8 files changed, 7685 insertions, 2113 deletions
diff --git a/gr-digital/examples/demod/ber_simulation.grc b/gr-digital/examples/demod/ber_simulation.grc
index 72d52d3730..4d59390377 100644
--- a/gr-digital/examples/demod/ber_simulation.grc
+++ b/gr-digital/examples/demod/ber_simulation.grc
@@ -1,59 +1,81 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Mon Jan 14 11:20:53 2013</timestamp>
+  <timestamp>Wed Jul  9 17:52:56 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>ber_simulation</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value>BER Simulation</value>
+      <key>value</key>
+      <value>100e3</value>
     </param>
     <param>
-      <key>author</key>
-      <value>Example</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>description</key>
-      <value>Adjust the noise and constellation... see what happens!</value>
+      <key>_coordinate</key>
+      <value>(16, 308)</value>
     </param>
     <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
+      <key>id</key>
+      <value>const</value>
     </param>
     <param>
-      <key>category</key>
-      <value>Custom</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>run_options</key>
-      <value>prompt</value>
+      <key>value</key>
+      <value>(digital.constellation_bpsk(), digital.constellation_qpsk(), digital.constellation_8psk())</value>
     </param>
     <param>
-      <key>run</key>
-      <value>True</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>max_nouts</key>
+      <key>_coordinate</key>
+      <value>(116, 310)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>const_type</value>
+    </param>
     <param>
-      <key>realtime_scheduling</key>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(16, 10)</value>
+      <value>(18, 428)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -83,6 +105,26 @@
       <value>1</value>
     </param>
     <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(284, 24)</value>
     </param>
@@ -92,10 +134,37 @@
     </param>
   </block>
   <block>
-    <key>blocks_add_xx</key>
+    <key>import</key>
     <param>
       <key>id</key>
-      <value>blocks_add_xx</value>
+      <value>import</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>import</key>
+      <value>import math</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(18, 373)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_random_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_random_source_x</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -103,19 +172,43 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>byte</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>2</value>
+      <key>min</key>
+      <value>0</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>max</key>
+      <value>const[const_type].arity()</value>
+    </param>
+    <param>
+      <key>num_samps</key>
+      <value>10000000</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(486, 151)</value>
+      <value>(17, 125)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -123,10 +216,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_numbersink2</key>
+    <key>analog_noise_source_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_numbersink2</value>
+      <value>analog_noise_source_x</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -134,98 +227,133 @@
     </param>
     <param>
       <key>type</key>
-      <value>float</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>title</key>
-      <value>BER</value>
+      <key>noise_type</key>
+      <value>analog.GR_GAUSSIAN</value>
     </param>
     <param>
-      <key>units</key>
-      <value>%</value>
+      <key>amp</key>
+      <value>1.0 / math.sqrt(2.0 * const[const_type].bits_per_symbol() * 10**(EbN0/10))</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>seed</key>
+      <value>42</value>
     </param>
     <param>
-      <key>min_value</key>
-      <value>0.0</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>max_value</key>
-      <value>1.0</value>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>factor</key>
-      <value>100</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>decimal_places</key>
-      <value>4</value>
+      <key>_coordinate</key>
+      <value>(16, 224)</value>
     </param>
     <param>
-      <key>ref_level</key>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>digital_chunks_to_symbols_xx</key>
     <param>
-      <key>number_rate</key>
-      <value>15</value>
+      <key>id</key>
+      <value>digital_chunks_to_symbols_xx</value>
     </param>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>in_type</key>
+      <value>byte</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>out_type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>show_gauge</key>
-      <value>False</value>
+      <key>symbol_table</key>
+      <value>const[const_type].points()</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>dimension</key>
+      <value>1</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>1, 0, 1, 1</value>
+      <key>num_ports</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(791, 228)</value>
+      <value>(240, 140)</value>
     </param>
     <param>
       <key>_rotation</key>
-      <value>180</value>
+      <value>0</value>
     </param>
   </block>
   <block>
-    <key>import</key>
+    <key>digital_constellation_decoder_cb</key>
     <param>
       <key>id</key>
-      <value>import</value>
+      <value>digital_constellation_decoder_cb_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>import</key>
-      <value>import math</value>
+      <key>constellation</key>
+      <value>const[const_type].base()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(18, 373)</value>
+      <value>(618, 164)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -233,7 +361,7 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
       <value>EbN0</value>
@@ -244,43 +372,47 @@
     </param>
     <param>
       <key>label</key>
-      <value>Eb/N0 (dB)</value>
+      <value>Eb / N0 (dB)</value>
     </param>
     <param>
       <key>value</key>
       <value>10</value>
     </param>
     <param>
-      <key>min</key>
+      <key>start</key>
       <value>-10</value>
     </param>
     <param>
-      <key>max</key>
+      <key>stop</key>
       <value>200</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>211</value>
+      <key>step</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>min_len</key>
+      <value>200</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>gui_hint</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(311, 309)</value>
+      <value>(317, 281)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -288,22 +420,38 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>variable_qtgui_label</key>
     <param>
       <key>id</key>
-      <value>const</value>
+      <value>variable_qtgui_label_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>label</key>
+      <value>Constellation Type</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>string</value>
+    </param>
+    <param>
       <key>value</key>
-      <value>(digital.constellation_bpsk(), digital.constellation_qpsk(), digital.constellation_8psk())</value>
+      <value>{0: 'BPSK', 1: 'QPSK', 2: '8-PSK'}[const_type] + " - Change const_type for different constellation types!"</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(116, 310)</value>
+      <value>(294, 413)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -311,10 +459,10 @@
     </param>
   </block>
   <block>
-    <key>analog_random_source_x</key>
+    <key>blocks_add_xx</key>
     <param>
       <key>id</key>
-      <value>analog_random_source_x</value>
+      <value>blocks_add_xx</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -322,27 +470,35 @@
     </param>
     <param>
       <key>type</key>
-      <value>byte</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>num_inputs</key>
+      <value>2</value>
     </param>
     <param>
-      <key>max</key>
-      <value>const[const_type].arity()</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>num_samps</key>
-      <value>10000000</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>repeat</key>
-      <value>True</value>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(17, 125)</value>
+      <value>(486, 151)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -350,10 +506,10 @@
     </param>
   </block>
   <block>
-    <key>analog_noise_source_x</key>
+    <key>qtgui_const_sink_x</key>
     <param>
       <key>id</key>
-      <value>analog_noise_source_x</value>
+      <value>qtgui_const_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -364,188 +520,316 @@
       <value>complex</value>
     </param>
     <param>
-      <key>noise_type</key>
-      <value>analog.GR_GAUSSIAN</value>
+      <key>name</key>
+      <value>"foo"</value>
     </param>
     <param>
-      <key>amp</key>
-      <value>1.0 / math.sqrt(2.0 * const[const_type].bits_per_symbol() * 10**(EbN0/10))</value>
+      <key>size</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>seed</key>
-      <value>42</value>
+      <key>autoscale</key>
+      <value>False</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(16, 224)</value>
+      <key>ymin</key>
+      <value>-2</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>ymax</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>xmin</key>
+      <value>-2</value>
+    </param>
+    <param>
+      <key>xmax</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>2,0,1,1</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>digital_chunks_to_symbols_xx</key>
     <param>
-      <key>id</key>
-      <value>digital_chunks_to_symbols_xx</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>label1</key>
+      <value>"Constellation: "+str(const[const_type].arity()) + "-PSK"</value>
     </param>
     <param>
-      <key>in_type</key>
-      <value>byte</value>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>out_type</key>
-      <value>complex</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>symbol_table</key>
-      <value>const[const_type].points()</value>
+      <key>style1</key>
+      <value>0</value>
     </param>
     <param>
-      <key>dimension</key>
+      <key>marker1</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
       <value>1</value>
     </param>
     <param>
-      <key>num_ports</key>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
       <value>1</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(240, 140)</value>
+      <key>color3</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>style3</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>blks2_error_rate</key>
     <param>
-      <key>id</key>
-      <value>blks2_error_rate</value>
+      <key>marker3</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>alpha3</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>type</key>
-      <value>'BER'</value>
+      <key>label4</key>
+      <value></value>
     </param>
     <param>
-      <key>win_size</key>
-      <value>int(1e7)</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>bits_per_symbol</key>
-      <value>const[const_type].bits_per_symbol()</value>
+      <key>color4</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(720, 25)</value>
+      <key>style4</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>marker4</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>digital_constellation_decoder_cb</key>
     <param>
-      <key>id</key>
-      <value>digital_constellation_decoder_cb_0</value>
+      <key>alpha4</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>constellation</key>
-      <value>const[const_type].base()</value>
+      <key>width5</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(618, 164)</value>
+      <key>color5</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>style5</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>wxgui_scopesink2</key>
     <param>
-      <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <key>marker5</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>alpha5</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>label6</key>
+      <value></value>
     </param>
     <param>
-      <key>title</key>
-      <value>"Constellation: "+str(const[const_type].arity()) + "-PSK"</value>
+      <key>width6</key>
+      <value>1</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>color6</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>v_scale</key>
+      <key>style6</key>
       <value>0</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>marker6</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style7</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>marker7</key>
+      <value>0</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>True</value>
+      <key>alpha7</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>color8</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>2, 0, 1, 1</value>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(623, 228)</value>
+      <value>(603, 253)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -553,22 +837,46 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>blks2_error_rate</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>blks2_error_rate</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>100e3</value>
+      <key>type</key>
+      <value>'BER'</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value>int(1e7)</value>
+    </param>
+    <param>
+      <key>bits_per_symbol</key>
+      <value>const[const_type].bits_per_symbol()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(16, 308)</value>
+      <value>(720, 25)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -576,22 +884,62 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>options</key>
     <param>
       <key>id</key>
-      <value>const_type</value>
+      <value>ber_simulation</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>1</value>
+      <key>title</key>
+      <value>BER Simulation</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value>Example</value>
+    </param>
+    <param>
+      <key>description</key>
+      <value>Adjust the noise and constellation... see what happens!</value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(18, 428)</value>
+      <value>(16, 10)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -599,42 +947,142 @@
     </param>
   </block>
   <block>
-    <key>variable_static_text</key>
+    <key>qtgui_number_sink</key>
     <param>
       <key>id</key>
-      <value>variable_static_text_0</value>
+      <value>qtgui_number_sink_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Constellation Type</value>
+      <key>type</key>
+      <value>float</value>
     </param>
     <param>
-      <key>value</key>
-      <value>{0: 'BPSK', 1: 'QPSK', 2: '8-PSK'}[const_type] + " - Change const_type for different constellation types!"</value>
+      <key>autoscale</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>avg</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>graph_type</key>
+      <value>qtgui.NUM_GRAPH_HORIZ</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>str_converter</value>
+      <key>min</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>1,0,1,1</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value>BER</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>("black", "black")</value>
     </param>
     <param>
-      <key>formatter</key>
-      <value>None</value>
+      <key>label10</key>
+      <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>color10</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(422, 311)</value>
+      <value>(940, 26)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -642,12 +1090,6 @@
     </param>
   </block>
   <connection>
-    <source_block_id>blks2_error_rate</source_block_id>
-    <sink_block_id>wxgui_numbersink2</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>blocks_throttle</source_block_id>
     <sink_block_id>blks2_error_rate</sink_block_id>
     <source_key>0</source_key>
@@ -678,12 +1120,6 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_add_xx</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>digital_constellation_decoder_cb_0</source_block_id>
     <sink_block_id>blks2_error_rate</sink_block_id>
     <source_key>0</source_key>
@@ -695,4 +1131,16 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blocks_add_xx</source_block_id>
+    <sink_block_id>qtgui_const_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blks2_error_rate</source_block_id>
+    <sink_block_id>qtgui_number_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
 </flow_graph>
diff --git a/gr-digital/examples/demod/digital_freq_lock.grc b/gr-digital/examples/demod/digital_freq_lock.grc
index 399d6a8e01..0b8955df53 100644
--- a/gr-digital/examples/demod/digital_freq_lock.grc
+++ b/gr-digital/examples/demod/digital_freq_lock.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Tue Jan 15 14:17:18 2013</timestamp>
+  <timestamp>Tue Jul  8 23:23:18 2014</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -29,7 +29,7 @@
     </param>
     <param>
       <key>generate_options</key>
-      <value>wx_gui</value>
+      <value>qt_gui</value>
     </param>
     <param>
       <key>category</key>
@@ -52,6 +52,10 @@
       <value></value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(-1, 0)</value>
     </param>
@@ -64,7 +68,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sps</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -72,11 +76,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>4</value>
+      <value>32000</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(166, -2)</value>
+      <value>(311, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -98,8 +106,12 @@
       <value>0.35</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(231, 0)</value>
+      <value>(223, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -110,7 +122,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>sps</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -118,11 +130,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>32000</value>
+      <value>4</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(439, -1)</value>
+      <value>(154, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -130,54 +146,62 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>digital_psk_mod</key>
     <param>
       <key>id</key>
-      <value>freq_offset</value>
+      <value>digital_psk_mod_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Frequency Offset</value>
+      <key>constellation_points</key>
+      <value>2</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>mod_code</key>
+      <value>"gray"</value>
     </param>
     <param>
-      <key>min</key>
-      <value>-0.5</value>
+      <key>differential</key>
+      <value>False</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.5</value>
+      <key>samples_per_symbol</key>
+      <value>sps</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>excess_bw</key>
+      <value>rolloff</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>verbose</key>
+      <value>False</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>log</key>
+      <value>False</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(673, -1)</value>
+      <value>(202, 142)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -185,10 +209,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>analog_random_source_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0</value>
+      <value>analog_random_source_x</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -196,63 +220,102 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>byte</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Frequency Corrected Signal</value>
+      <key>min</key>
+      <value>0</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>max</key>
+      <value>256</value>
+    </param>
+    <param>
+      <key>num_samps</key>
+      <value>10000000</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>v_scale</key>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>_coordinate</key>
+      <value>(8, 150)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>channels_channel_model</key>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>id</key>
+      <value>channels_channel_model_0</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>noise_voltage</key>
+      <value>noise_amp</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>freq_offset</key>
+      <value>freq_offset</value>
+    </param>
+    <param>
+      <key>epsilon</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>42</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>block_tags</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,1</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(439, 289)</value>
+      <value>(681, 142)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -260,10 +323,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>blocks_throttle</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0_0</value>
+      <value>blocks_throttle_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -274,76 +337,91 @@
       <value>complex</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Frequency Corrected Signal</value>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>baseband_freq</key>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>_coordinate</key>
+      <value>(469, 172)</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>10</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>digital_fll_band_edge_cc</key>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>id</key>
+      <value>digital_fll_band_edge_cc_0</value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>30</value>
+      <key>type</key>
+      <value>cc</value>
     </param>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>samps_per_sym</key>
+      <value>sps</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>rolloff</key>
+      <value>rolloff</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>filter_size</key>
+      <value>44</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>w</key>
+      <value>freq_bw</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,0</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(439, 423)</value>
+      <value>(583, 286)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -351,10 +429,10 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>freq_bw</value>
+      <value>noise_amp</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -362,43 +440,47 @@
     </param>
     <param>
       <key>label</key>
-      <value>FLL Loop Bandwidth</value>
+      <value>Channel Noise</value>
     </param>
     <param>
       <key>value</key>
       <value>0</value>
     </param>
     <param>
-      <key>min</key>
+      <key>start</key>
       <value>0</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.1</value>
+      <key>stop</key>
+      <value>1</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>step</key>
+      <value>0.01</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value></value>
+      <key>min_len</key>
+      <value>200</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>gui_hint</key>
+      <value>0, 0, 1, 1</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(74, 436)</value>
+      <value>(498, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -406,34 +488,58 @@
     </param>
   </block>
   <block>
-    <key>notebook</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>notebook_0</value>
+      <value>freq_offset</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.NB_TOP</value>
+      <key>label</key>
+      <value>Frequency Offset</value>
     </param>
     <param>
-      <key>labels</key>
-      <value>['Freq', 'Time']</value>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value></value>
+      <key>start</key>
+      <value>-.5</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>.5</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>0.01</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>1, 0, 1, 1</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(108, 568)</value>
+      <value>(624, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -441,38 +547,109 @@
     </param>
   </block>
   <block>
-    <key>digital_fll_band_edge_cc</key>
+    <key>qtgui_tab_widget</key>
     <param>
       <key>id</key>
-      <value>digital_fll_band_edge_cc_0</value>
+      <value>notebook</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>cc</value>
+      <key>num_tabs</key>
+      <value>2</value>
     </param>
     <param>
-      <key>samps_per_sym</key>
-      <value>sps</value>
+      <key>label0</key>
+      <value>Frequency</value>
     </param>
     <param>
-      <key>rolloff</key>
-      <value>rolloff</value>
+      <key>label1</key>
+      <value>Time</value>
     </param>
     <param>
-      <key>filter_size</key>
-      <value>44</value>
+      <key>label2</key>
+      <value>Tab 2</value>
     </param>
     <param>
-      <key>w</key>
+      <key>label3</key>
+      <value>Tab 3</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value>Tab 4</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>3, 0, 1, 1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(0, 69)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
+    <param>
+      <key>id</key>
       <value>freq_bw</value>
     </param>
     <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value></value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>0.1</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>0.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>2, 0, 1, 1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(75, 295)</value>
+      <value>(399, 290)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -480,10 +657,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>qtgui_freq_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0</value>
+      <value>qtgui_freq_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -494,76 +671,224 @@
       <value>complex</value>
     </param>
     <param>
-      <key>title</key>
+      <key>name</key>
       <value>Signal into Receiver</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>fftsize</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>baseband_freq</key>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+    </param>
+    <param>
+      <key>fc</key>
       <value>0</value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>bw</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>autoscale</key>
+      <value>False</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>10</value>
+      <key>average</key>
+      <value>0.1</value>
     </param>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>ymin</key>
+      <value>-120</value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>ymax</key>
+      <value>-20</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>30</value>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>update_time</key>
+      <value>0.10</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>gui_hint</key>
+      <value>notebook@0</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,0</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(918, 107)</value>
+      <value>(931, 200)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -571,10 +896,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>qtgui_freq_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>qtgui_freq_sink_x_1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -585,107 +910,224 @@
       <value>complex</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Signal into Receiver</value>
+      <key>name</key>
+      <value>Frequency Corrected Signal</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>fftsize</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>0</value>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>fc</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>0</value>
+      <key>bw</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>ac_couple</key>
+      <key>autoscale</key>
       <value>False</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>average</key>
+      <value>0.1</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-120</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>ymax</key>
+      <value>-20</value>
+    </param>
+    <param>
+      <key>nconnections</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@0</value>
+    </param>
+    <param>
+      <key>label1</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,1</value>
+      <key>width2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>color2</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>alpha2</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(918, 0)</value>
+      <key>label3</key>
+      <value></value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>width3</key>
+      <value>1</value>
     </param>
-  </block>
-  <block>
-    <key>digital_psk_mod</key>
     <param>
-      <key>id</key>
-      <value>digital_psk_mod_0</value>
+      <key>color3</key>
+      <value>"green"</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>alpha3</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>constellation_points</key>
-      <value>2</value>
+      <key>label4</key>
+      <value></value>
     </param>
     <param>
-      <key>mod_code</key>
-      <value>"gray"</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>differential</key>
-      <value>False</value>
+      <key>color4</key>
+      <value>"black"</value>
     </param>
     <param>
-      <key>samples_per_symbol</key>
-      <value>sps</value>
+      <key>alpha4</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>excess_bw</key>
-      <value>rolloff</value>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>verbose</key>
-      <value>False</value>
+      <key>width5</key>
+      <value>1</value>
     </param>
     <param>
-      <key>log</key>
-      <value>False</value>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(202, 142)</value>
+      <value>(929, 436)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -693,10 +1135,10 @@
     </param>
   </block>
   <block>
-    <key>analog_random_source_x</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>analog_random_source_x</value>
+      <value>qtgui_time_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -704,66 +1146,323 @@
     </param>
     <param>
       <key>type</key>
-      <value>byte</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>name</key>
+      <value>Frequency Corrected Signal</value>
     </param>
     <param>
-      <key>max</key>
-      <value>256</value>
+      <key>size</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>num_samps</key>
-      <value>10000000</value>
+      <key>srate</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>repeat</key>
+      <key>autoscale</key>
       <value>True</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(8, 150)</value>
+      <key>ymin</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>ymax</key>
+      <value>1</value>
     </param>
-  </block>
-  <block>
-    <key>channels_channel_model</key>
     <param>
-      <key>id</key>
-      <value>channels_channel_model_0</value>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
       <value>True</value>
     </param>
     <param>
-      <key>noise_voltage</key>
-      <value>noise_amp</value>
+      <key>gui_hint</key>
+      <value>notebook@1</value>
     </param>
     <param>
-      <key>freq_offset</key>
-      <value>freq_offset</value>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
     </param>
     <param>
-      <key>epsilon</key>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_chan</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
       <value>1.0</value>
     </param>
     <param>
-      <key>taps</key>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
       <value>1.0</value>
     </param>
     <param>
-      <key>seed</key>
-      <value>42</value>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(681, 142)</value>
+      <value>(930, 324)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -771,10 +1470,10 @@
     </param>
   </block>
   <block>
-    <key>blocks_throttle</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>blocks_throttle_0</value>
+      <value>qtgui_time_sink_x_0_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -785,71 +1484,320 @@
       <value>complex</value>
     </param>
     <param>
-      <key>samples_per_second</key>
+      <key>name</key>
+      <value>Signal into Receiver</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>autoscale</key>
+      <value>True</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(487, 174)</value>
+      <key>ymin</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>ymax</key>
+      <value>1</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>noise_amp</value>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Channel Noise</value>
+      <key>gui_hint</key>
+      <value>notebook@1</value>
     </param>
     <param>
-      <key>value</key>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>min</key>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
     <param>
-      <key>max</key>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
       <value>1.0</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>width5</key>
+      <value>1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>label6</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(549, 0)</value>
+      <value>(928, 41)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -857,50 +1805,50 @@
     </param>
   </block>
   <connection>
-    <source_block_id>channels_channel_model_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+    <source_block_id>analog_random_source_x</source_block_id>
+    <sink_block_id>digital_psk_mod_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>channels_channel_model_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+    <source_block_id>digital_psk_mod_0</source_block_id>
+    <sink_block_id>blocks_throttle_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>analog_random_source_x</source_block_id>
-    <sink_block_id>digital_psk_mod_0</sink_block_id>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>channels_channel_model_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_psk_mod_0</source_block_id>
-    <sink_block_id>blocks_throttle_0</sink_block_id>
+    <source_block_id>channels_channel_model_0</source_block_id>
+    <sink_block_id>digital_fll_band_edge_cc_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_throttle_0</source_block_id>
-    <sink_block_id>channels_channel_model_0</sink_block_id>
+    <source_block_id>channels_channel_model_0</source_block_id>
+    <sink_block_id>qtgui_freq_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>channels_channel_model_0</source_block_id>
-    <sink_block_id>digital_fll_band_edge_cc_0</sink_block_id>
+    <sink_block_id>qtgui_time_sink_x_0_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>digital_fll_band_edge_cc_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0</sink_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>digital_fll_band_edge_cc_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0_0</sink_block_id>
+    <sink_block_id>qtgui_freq_sink_x_1</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
diff --git a/gr-digital/examples/demod/dpsk_loopback.grc b/gr-digital/examples/demod/dpsk_loopback.grc
index daa076c47b..c0ad423a5b 100644
--- a/gr-digital/examples/demod/dpsk_loopback.grc
+++ b/gr-digital/examples/demod/dpsk_loopback.grc
@@ -1,59 +1,51 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sat Nov 10 15:13:23 2012</timestamp>
+  <timestamp>Tue Jul  8 23:26:29 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>blocks_throttle</key>
     <param>
       <key>id</key>
-      <value>dpsk_loopback</value>
+      <value>blocks_throttle_0_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value>DPSK Loopback</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value>GNU Radio</value>
-    </param>
-    <param>
-      <key>description</key>
-      <value>Encode a signal into a packet, modulate, demodulate, decode and show it's the same data.</value>
+      <key>type</key>
+      <value>float</value>
     </param>
     <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>category</key>
-      <value>Custom</value>
+      <key>ignoretag</key>
+      <value>True</value>
     </param>
     <param>
-      <key>run_options</key>
-      <value>prompt</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>run</key>
-      <value>True</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>max_nouts</key>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>realtime_scheduling</key>
-      <value></value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(10, 10)</value>
+      <value>(381, 51)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -75,63 +67,12 @@
       <value>10000</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(11, 120)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
-    <param>
-      <key>id</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label</key>
-      <value>Frequency (Hz)</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>500</value>
-    </param>
-    <param>
-      <key>min</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>max</key>
-      <value>samp_rate/2</value>
-    </param>
-    <param>
-      <key>num_steps</key>
-      <value>100</value>
-    </param>
-    <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
-    </param>
-    <param>
-      <key>converver</key>
-      <value>float_converter</value>
-    </param>
-    <param>
-      <key>grid_pos</key>
-      <value></value>
-    </param>
-    <param>
-      <key>notebook</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(13, 188)</value>
+      <value>(5, 115)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -139,10 +80,10 @@
     </param>
   </block>
   <block>
-    <key>blocks_throttle</key>
+    <key>blks2_packet_encoder</key>
     <param>
       <key>id</key>
-      <value>blocks_throttle_0_0</value>
+      <value>blks2_packet_encoder_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -153,54 +94,43 @@
       <value>float</value>
     </param>
     <param>
-      <key>samples_per_second</key>
-      <value>samp_rate</value>
+      <key>samples_per_symbol</key>
+      <value>2</value>
     </param>
     <param>
-      <key>vlen</key>
+      <key>bits_per_symbol</key>
       <value>1</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(381, 51)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>preamble</key>
+      <value></value>
     </param>
-  </block>
-  <block>
-    <key>blks2_packet_encoder</key>
     <param>
-      <key>id</key>
-      <value>blks2_packet_encoder_0</value>
+      <key>access_code</key>
+      <value></value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>pad_for_usrp</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>float</value>
-    </param>
-    <param>
-      <key>samples_per_symbol</key>
-      <value>2</value>
+      <key>payload_length</key>
+      <value>0</value>
     </param>
     <param>
-      <key>bits_per_symbol</key>
-      <value>1</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>access_code</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>pad_for_usrp</key>
-      <value>True</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>payload_length</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
@@ -247,6 +177,22 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(806, 27)</value>
     </param>
@@ -306,6 +252,22 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(745, 139)</value>
     </param>
@@ -315,10 +277,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>blks2_packet_decoder</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>blks2_packet_decoder_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -329,60 +291,367 @@
       <value>float</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <key>access_code</key>
+      <value></value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>threshold</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>v_scale</key>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>1./freq</value>
+      <key>_coordinate</key>
+      <value>(545, 187)</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>_rotation</key>
+      <value>180</value>
+    </param>
+  </block>
+  <block>
+    <key>qtgui_time_sink_x</key>
+    <param>
+      <key>id</key>
+      <value>qtgui_time_sink_x_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>xy_mode</key>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>name</key>
+      <value>QT GUI Plot</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>autoscale</key>
       <value>False</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>ymin</key>
+      <value>-1.1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1.1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_chan</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(184, 163)</value>
+      <value>(249, 172)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -390,42 +659,121 @@
     </param>
   </block>
   <block>
-    <key>analog_sig_source_x</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>analog_sig_source_x_0</value>
+      <value>freq</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>float</value>
+      <key>label</key>
+      <value></value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>value</key>
+      <value>500</value>
     </param>
     <param>
-      <key>waveform</key>
-      <value>analog.GR_COS_WAVE</value>
+      <key>start</key>
+      <value>0</value>
     </param>
     <param>
-      <key>freq</key>
-      <value>freq</value>
+      <key>stop</key>
+      <value>5000</value>
     </param>
     <param>
-      <key>amp</key>
+      <key>step</key>
       <value>1</value>
     </param>
     <param>
-      <key>offset</key>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(0, 187)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>dpsk_loopback</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>DPSK Loopback</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value>GNU Radio</value>
+    </param>
+    <param>
+      <key>description</key>
+      <value>Encode a signal into a packet, modulate, demodulate, decode and show it's the same data.</value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
     <param>
       <key>_coordinate</key>
-      <value>(190, 19)</value>
+      <value>(0, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -433,10 +781,10 @@
     </param>
   </block>
   <block>
-    <key>blks2_packet_decoder</key>
+    <key>analog_sig_source_x</key>
     <param>
       <key>id</key>
-      <value>blks2_packet_decoder_0</value>
+      <value>analog_sig_source_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -447,29 +795,51 @@
       <value>float</value>
     </param>
     <param>
-      <key>access_code</key>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>waveform</key>
+      <value>analog.GR_COS_WAVE</value>
+    </param>
+    <param>
+      <key>freq</key>
+      <value>freq</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>offset</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>threshold</key>
-      <value>-1</value>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(545, 187)</value>
+      <value>(188, 23)</value>
     </param>
     <param>
       <key>_rotation</key>
-      <value>180</value>
+      <value>0</value>
     </param>
   </block>
   <connection>
-    <source_block_id>blks2_packet_decoder_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>blks2_packet_encoder_0</source_block_id>
     <sink_block_id>digital_dxpsk_mod_1</sink_block_id>
     <source_key>0</source_key>
@@ -499,4 +869,10 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blks2_packet_decoder_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
 </flow_graph>
diff --git a/gr-digital/examples/demod/pam_sync.grc b/gr-digital/examples/demod/pam_sync.grc
index 98b4d4a63d..e3de4296e2 100644
--- a/gr-digital/examples/demod/pam_sync.grc
+++ b/gr-digital/examples/demod/pam_sync.grc
@@ -1,59 +1,54 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sun Mar 17 21:08:58 2013</timestamp>
+  <timestamp>Wed Jul  9 12:32:34 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>pam_sync</value>
+      <value>sig_amp</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value></value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
+      <key>value</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>description</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
+      <key>_coordinate</key>
+      <value>(887, -1)</value>
     </param>
     <param>
-      <key>category</key>
-      <value>Custom</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>run_options</key>
-      <value>prompt</value>
+      <key>id</key>
+      <value>const</value>
     </param>
     <param>
-      <key>run</key>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>max_nouts</key>
-      <value>0</value>
+      <key>value</key>
+      <value>digital.qpsk_constellation()</value>
     </param>
     <param>
-      <key>realtime_scheduling</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(-1, 0)</value>
+      <value>(336, -2)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -64,7 +59,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>const</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -72,11 +67,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.qpsk_constellation()</value>
+      <value>128000</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(336, -2)</value>
+      <value>(193, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -84,22 +83,26 @@
     </param>
   </block>
   <block>
-    <key>virtual_sink</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>virtual_sink_0</value>
+      <value>spb</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>stream_id</key>
-      <value>input_signal_probe</value>
+      <key>value</key>
+      <value>4.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(330, 183)</value>
+      <value>(513, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -110,7 +113,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>rolloff</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -118,11 +121,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>128000</value>
+      <value>0.35</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(193, -1)</value>
+      <value>(578, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -130,38 +137,53 @@
     </param>
   </block>
   <block>
-    <key>analog_random_source_x</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>analog_random_source_x</value>
+      <value>rrctaps</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>byte</value>
+      <key>value</key>
+      <value>firdes.root_raised_cosine(nfilts,1.0,1.0/(nfilts*spb), rolloff, int(11*spb*nfilts))</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>max</key>
-      <value>const.arity()</value>
+      <key>_coordinate</key>
+      <value>(660, 0)</value>
     </param>
     <param>
-      <key>num_samps</key>
-      <value>10000000</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>repeat</key>
+      <key>id</key>
+      <value>nfilts</value>
+    </param>
+    <param>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>value</key>
+      <value>32</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(0, 72)</value>
+      <value>(816, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -169,74 +191,77 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>virtual_sink</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0_1</value>
+      <value>virtual_sink_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>stream_id</key>
+      <value>input_signal_probe</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Pre-sync Signal</value>
+      <key>_coordinate</key>
+      <value>(330, 183)</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>analog_random_source_x</key>
     <param>
-      <key>v_scale</key>
-      <value>.5</value>
+      <key>id</key>
+      <value>analog_random_source_x</value>
     </param>
     <param>
-      <key>v_offset</key>
-      <value>0</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>0</value>
+      <key>type</key>
+      <value>byte</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>min</key>
+      <value>0</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>max</key>
+      <value>const.arity()</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>num_samps</key>
+      <value>10000000</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>repeat</key>
+      <value>True</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,1</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1081, 439)</value>
+      <value>(0, 72)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -244,90 +269,121 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>digital_chunks_to_symbols_xx</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0</value>
+      <value>digital_chunks_to_symbols_xx</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
+      <key>in_type</key>
+      <value>byte</value>
+    </param>
+    <param>
+      <key>out_type</key>
       <value>complex</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Received spectrum</value>
+      <key>symbol_table</key>
+      <value>const.points()</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>dimension</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>num_ports</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>baseband_freq</key>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>_coordinate</key>
+      <value>(178, 87)</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>10</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>digital_pfb_clock_sync_xxx</key>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>id</key>
+      <value>digital_pfb_clock_sync_xxx_0</value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>30</value>
+      <key>type</key>
+      <value>ccf</value>
     </param>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>sps</key>
+      <value>spb</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>loop_bw</key>
+      <value>time_bw</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>taps</key>
+      <value>rrctaps</value>
+    </param>
+    <param>
+      <key>filter_size</key>
+      <value>nfilts</value>
+    </param>
+    <param>
+      <key>init_phase</key>
+      <value>16</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>max_dev</key>
+      <value>1.5</value>
+    </param>
+    <param>
+      <key>osps</key>
+      <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,1</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1081, 563)</value>
+      <value>(598, 241)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -335,54 +391,58 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>channels_channel_model</key>
     <param>
       <key>id</key>
-      <value>phase_bw</value>
+      <value>channels_channel_model_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Costas Loop (Phase) Bandwidth</value>
+      <key>noise_voltage</key>
+      <value>noise_amp</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>freq_offset</key>
+      <value>freq_offset</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>epsilon</key>
+      <value>interpratio</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.1</value>
+      <key>taps</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>42</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>block_tags</key>
+      <value>False</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(7,2,1,1)</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>notebook</key>
-      <value></value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(866, 313)</value>
+      <value>(59, 184)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -390,61 +450,46 @@
     </param>
   </block>
   <block>
-    <key>digital_chunks_to_symbols_xx</key>
+    <key>blocks_multiply_const_vxx</key>
     <param>
       <key>id</key>
-      <value>digital_chunks_to_symbols_xx</value>
+      <value>blocks_multiply_const_vxx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>in_type</key>
-      <value>byte</value>
-    </param>
-    <param>
-      <key>out_type</key>
+      <key>type</key>
       <value>complex</value>
     </param>
     <param>
-      <key>symbol_table</key>
-      <value>const.points()</value>
+      <key>const</key>
+      <value>sig_amp</value>
     </param>
     <param>
-      <key>dimension</key>
+      <key>vlen</key>
       <value>1</value>
     </param>
     <param>
-      <key>num_ports</key>
-      <value>1</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(178, 87)</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>spb</value>
-    </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>4.0</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(513, -1)</value>
+      <value>(807, 95)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -452,45 +497,50 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>blocks_throttle</key>
     <param>
       <key>id</key>
-      <value>rolloff</value>
+      <value>blocks_throttle_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0.35</value>
+      <key>type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(578, -1)</value>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
-  </block>
-  <block>
-    <key>variable</key>
     <param>
-      <key>id</key>
-      <value>rrctaps</value>
+      <key>ignoretag</key>
+      <value>True</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>value</key>
-      <value>firdes.root_raised_cosine(nfilts,1.0,1.0/(nfilts*spb), rolloff, int(11*spb*nfilts))</value>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(660, 0)</value>
+      <value>(987, 95)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -498,45 +548,58 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>pfb_arb_resampler_xxx</key>
     <param>
       <key>id</key>
-      <value>sig_amp</value>
+      <value>pfb_arb_resampler_xxx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>1.0</value>
+      <key>type</key>
+      <value>ccf</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(887, -1)</value>
+      <key>rrate</key>
+      <value>spb</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>taps</key>
+      <value>firdes.root_raised_cosine(nfilts, 1.0, 1.0/nfilts, rolloff, int(11*spb*nfilts))</value>
+    </param>
+    <param>
+      <key>nfilts</key>
+      <value>32</value>
+    </param>
+    <param>
+      <key>atten</key>
+      <value>100</value>
+    </param>
+    <param>
+      <key>samp_delay</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>variable</key>
     <param>
-      <key>id</key>
-      <value>nfilts</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>value</key>
-      <value>32</value>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(816, 0)</value>
+      <value>(455, 72)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -544,50 +607,58 @@
     </param>
   </block>
   <block>
-    <key>digital_pfb_clock_sync_xxx</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>digital_pfb_clock_sync_xxx_0</value>
+      <value>interpratio</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>ccf</value>
+      <key>label</key>
+      <value>Timing Offset</value>
     </param>
     <param>
-      <key>sps</key>
-      <value>spb</value>
+      <key>value</key>
+      <value>1</value>
     </param>
     <param>
-      <key>loop_bw</key>
-      <value>time_bw</value>
+      <key>start</key>
+      <value>.99</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>rrctaps</value>
+      <key>stop</key>
+      <value>1.01</value>
     </param>
     <param>
-      <key>filter_size</key>
-      <value>nfilts</value>
+      <key>step</key>
+      <value>0.0001</value>
     </param>
     <param>
-      <key>init_phase</key>
-      <value>16</value>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>max_dev</key>
-      <value>1.5</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>osps</key>
-      <value>1</value>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>3,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(598, 241)</value>
+      <value>(0, 452)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -595,38 +666,58 @@
     </param>
   </block>
   <block>
-    <key>pfb_arb_resampler_xxx</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>pfb_arb_resampler_xxx_0</value>
+      <value>noise_amp</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>ccf</value>
+      <key>label</key>
+      <value>Channel Noise</value>
     </param>
     <param>
-      <key>rrate</key>
-      <value>spb</value>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>firdes.root_raised_cosine(nfilts, 1.0, 1.0/nfilts, rolloff, int(11*spb*nfilts))</value>
+      <key>start</key>
+      <value>0</value>
     </param>
     <param>
-      <key>nfilts</key>
-      <value>32</value>
+      <key>stop</key>
+      <value>1</value>
     </param>
     <param>
-      <key>atten</key>
-      <value>100</value>
+      <key>step</key>
+      <value>.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>1,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(503, 63)</value>
+      <value>(136, 317)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -634,7 +725,7 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
       <value>freq_offset</value>
@@ -652,36 +743,40 @@
       <value>0</value>
     </param>
     <param>
-      <key>min</key>
-      <value>-0.5</value>
+      <key>start</key>
+      <value>-.5</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.5</value>
+      <key>stop</key>
+      <value>.5</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.01</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>min_len</key>
+      <value>200</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(2,2,1,1)</value>
+      <key>gui_hint</key>
+      <value>2,2,1,1</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(8, 314)</value>
+      <value>(-1, 317)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -689,54 +784,50 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>qtgui_tab_widget</key>
     <param>
       <key>id</key>
-      <value>noise_amp</value>
+      <value>notebook</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Channel Noise</value>
+      <key>num_tabs</key>
+      <value>2</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>label0</key>
+      <value>Synched Signal</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>label1</key>
+      <value>Received Signal</value>
     </param>
     <param>
-      <key>max</key>
-      <value>1.0</value>
+      <key>label2</key>
+      <value>Tab 2</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>label3</key>
+      <value>Tab 3</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>label4</key>
+      <value>Tab 4</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>gui_hint</key>
+      <value>1,1,8,1</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(1,2,1,1)</value>
-    </param>
-    <param>
-      <key>notebook</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(136, 314)</value>
+      <value>(150, 492)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -744,38 +835,58 @@
     </param>
   </block>
   <block>
-    <key>channels_channel_model</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>channels_channel_model_0</value>
+      <value>freq_bw</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>noise_voltage</key>
-      <value>noise_amp</value>
+      <key>label</key>
+      <value>FLL Bandwidth</value>
     </param>
     <param>
-      <key>freq_offset</key>
-      <value>freq_offset</value>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>epsilon</key>
-      <value>interpratio</value>
+      <key>start</key>
+      <value>0</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>1.0</value>
+      <key>stop</key>
+      <value>.05</value>
     </param>
     <param>
-      <key>seed</key>
-      <value>42</value>
+      <key>step</key>
+      <value>.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>4,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(59, 184)</value>
+      <value>(331, 383)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -813,8 +924,24 @@
       <value>freq_bw</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(331, 238)</value>
+      <value>(331, 237)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -822,145 +949,238 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>qtgui_freq_sink_x</key>
     <param>
       <key>id</key>
-      <value>freq_bw</value>
+      <value>qtgui_freq_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>FLL Bandwidth</value>
+      <key>type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>value</key>
+      <key>name</key>
+      <value>Post-sync Spectrum</value>
+    </param>
+    <param>
+      <key>fftsize</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+    </param>
+    <param>
+      <key>fc</key>
       <value>0</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0.0</value>
+      <key>bw</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.05</value>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>average</key>
+      <value>0.2</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>ymin</key>
+      <value>-140</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>ymax</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>update_time</key>
+      <value>0.10</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(4,2,1,1)</value>
+      <key>gui_hint</key>
+      <value>notebook@0</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>label1</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(335, 379)</value>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>180</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
-  </block>
-  <block>
-    <key>wxgui_fftsink2</key>
     <param>
-      <key>id</key>
-      <value>wxgui_fftsink2_0_0</value>
+      <key>alpha1</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>label2</key>
+      <value></value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>width2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Post-sync spectrum</value>
+      <key>color2</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>alpha2</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>baseband_freq</key>
-      <value>0</value>
+      <key>label3</key>
+      <value></value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>width3</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>color3</key>
+      <value>"green"</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>10</value>
+      <key>alpha3</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>label4</key>
+      <value></value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>30</value>
+      <key>color4</key>
+      <value>"black"</value>
     </param>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>alpha4</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>alpha8</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,0</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(337, 523)</value>
+      <value>(337, 519)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -986,6 +1206,22 @@
       <value>const.arity()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(871, 225)</value>
     </param>
@@ -995,10 +1231,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>qtgui_time_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1009,60 +1245,320 @@
       <value>complex</value>
     </param>
     <param>
-      <key>title</key>
+      <key>name</key>
       <value>Post-sync Signal</value>
     </param>
     <param>
-      <key>samp_rate</key>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>0</value>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@0</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>True</value>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>style3</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,0</value>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>style6</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1103, 196)</value>
+      <value>(1096, 198)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1070,22 +1566,58 @@
     </param>
   </block>
   <block>
-    <key>virtual_source</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>virtual_source_0</value>
+      <value>time_bw</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>stream_id</key>
-      <value>input_signal_probe</value>
+      <key>label</key>
+      <value>Timing Loop BW</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>.1</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>5,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(828, 562)</value>
+      <value>(586, 402)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1093,30 +1625,58 @@
     </param>
   </block>
   <block>
-    <key>blocks_multiply_const_vxx</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>blocks_multiply_const_vxx_0</value>
+      <value>phase_bw</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>label</key>
+      <value>Costas Loop (Phase) Bandwidth</value>
     </param>
     <param>
-      <key>const</key>
-      <value>sig_amp</value>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>.1</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>7,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(807, 95)</value>
+      <value>(844, 325)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1124,10 +1684,10 @@
     </param>
   </block>
   <block>
-    <key>blocks_throttle</key>
+    <key>qtgui_freq_sink_x</key>
     <param>
       <key>id</key>
-      <value>blocks_throttle_0</value>
+      <value>qtgui_freq_sink_x_1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1138,16 +1698,224 @@
       <value>complex</value>
     </param>
     <param>
-      <key>samples_per_second</key>
+      <key>name</key>
+      <value>Received Spectrum</value>
+    </param>
+    <param>
+      <key>fftsize</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+    </param>
+    <param>
+      <key>fc</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>bw</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>vlen</key>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>average</key>
+      <value>0.2</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-140</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@1</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
       <value>1</value>
     </param>
     <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(987, 95)</value>
+      <value>(1101, 481)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1155,144 +1923,420 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>virtual_source</key>
     <param>
       <key>id</key>
-      <value>time_bw</value>
+      <value>virtual_source_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Timing Loop BW</value>
+      <key>stream_id</key>
+      <value>input_signal_probe</value>
     </param>
     <param>
-      <key>value</key>
+      <key>_coordinate</key>
+      <value>(836, 476)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>qtgui_time_sink_x</key>
     <param>
-      <key>min</key>
+      <key>id</key>
+      <value>qtgui_time_sink_x_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>name</key>
+      <value>Pre-sync Signal</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@1</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.1</value>
+      <key>tr_chan</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>style1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>marker1</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(5,2,1,1)</value>
+      <key>alpha1</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>label2</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(598, 388)</value>
+      <key>width2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>color2</key>
+      <value>"red"</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>interpratio</value>
+      <key>style2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>marker2</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Timing Offset</value>
+      <key>alpha2</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>value</key>
-      <value>1.00</value>
+      <key>label3</key>
+      <value></value>
     </param>
     <param>
-      <key>min</key>
-      <value>0.99</value>
+      <key>width3</key>
+      <value>1</value>
     </param>
     <param>
-      <key>max</key>
-      <value>1.01</value>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>marker10</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>alpha10</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(3,2,1,1)</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(42, 459)</value>
+      <value>(1104, 349)</value>
     </param>
     <param>
       <key>_rotation</key>
-      <value>180</value>
+      <value>0</value>
     </param>
   </block>
   <block>
-    <key>notebook</key>
+    <key>options</key>
     <param>
       <key>id</key>
-      <value>notebook_0</value>
+      <value>pam_sync</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.NB_TOP</value>
+      <key>title</key>
+      <value></value>
+    </param>
+    <param>
+      <key>author</key>
+      <value></value>
+    </param>
+    <param>
+      <key>description</key>
+      <value></value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
     </param>
     <param>
-      <key>labels</key>
-      <value>['Synched Signal', 'Received Signal']</value>
+      <key>run_options</key>
+      <value>prompt</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(1,1,8,1)</value>
+      <key>run</key>
+      <value>True</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(9, 601)</value>
+      <value>(-1, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1318,12 +2362,6 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_costas_loop_cc_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>pfb_arb_resampler_xxx_0</source_block_id>
     <sink_block_id>blocks_multiply_const_vxx_0</sink_block_id>
     <source_key>0</source_key>
@@ -1336,44 +2374,50 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_fll_band_edge_cc_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0_0</sink_block_id>
+    <source_block_id>analog_random_source_x</source_block_id>
+    <sink_block_id>digital_chunks_to_symbols_xx</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>virtual_source_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>channels_channel_model_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>virtual_source_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0_1</sink_block_id>
+    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
+    <sink_block_id>blocks_throttle_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>analog_random_source_x</source_block_id>
-    <sink_block_id>digital_chunks_to_symbols_xx</sink_block_id>
+    <source_block_id>digital_chunks_to_symbols_xx</source_block_id>
+    <sink_block_id>pfb_arb_resampler_xxx_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_throttle_0</source_block_id>
-    <sink_block_id>channels_channel_model_0</sink_block_id>
+    <source_block_id>digital_fll_band_edge_cc_0</source_block_id>
+    <sink_block_id>qtgui_freq_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
-    <sink_block_id>blocks_throttle_0</sink_block_id>
+    <source_block_id>digital_costas_loop_cc_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_chunks_to_symbols_xx</source_block_id>
-    <sink_block_id>pfb_arb_resampler_xxx_0</sink_block_id>
+    <source_block_id>virtual_source_0</source_block_id>
+    <sink_block_id>qtgui_freq_sink_x_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>virtual_source_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
diff --git a/gr-digital/examples/demod/pam_timing.grc b/gr-digital/examples/demod/pam_timing.grc
index 0e4dd4933a..a1ddbc148e 100644
--- a/gr-digital/examples/demod/pam_timing.grc
+++ b/gr-digital/examples/demod/pam_timing.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Tue Jan 15 15:21:46 2013</timestamp>
+  <timestamp>Wed Jul  9 23:37:48 2014</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -29,7 +29,7 @@
     </param>
     <param>
       <key>generate_options</key>
-      <value>wx_gui</value>
+      <value>qt_gui</value>
     </param>
     <param>
       <key>category</key>
@@ -52,6 +52,10 @@
       <value></value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(-1, 0)</value>
     </param>
@@ -61,38 +65,53 @@
     </param>
   </block>
   <block>
-    <key>analog_random_source_x</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>analog_random_source_x</value>
+      <value>nfilts</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>byte</value>
+      <key>value</key>
+      <value>32</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>max</key>
-      <value>const.arity()</value>
+      <key>_coordinate</key>
+      <value>(562, 334)</value>
     </param>
     <param>
-      <key>num_samps</key>
-      <value>10000000</value>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>rolloff</value>
     </param>
     <param>
-      <key>repeat</key>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>value</key>
+      <value>.35</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(-1, 163)</value>
+      <value>(482, 335)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -100,38 +119,53 @@
     </param>
   </block>
   <block>
-    <key>digital_chunks_to_symbols_xx</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>digital_chunks_to_symbols_xx</value>
+      <value>spb</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>in_type</key>
-      <value>byte</value>
+      <key>value</key>
+      <value>4.2563</value>
     </param>
     <param>
-      <key>out_type</key>
-      <value>complex</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>symbol_table</key>
-      <value>const.points()</value>
+      <key>_coordinate</key>
+      <value>(300, 0)</value>
     </param>
     <param>
-      <key>dimension</key>
-      <value>1</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>num_ports</key>
-      <value>1</value>
+      <key>id</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>32000</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(203, 178)</value>
+      <value>(267, 357)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -142,7 +176,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>const</value>
+      <value>sig_amp</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -150,11 +184,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.qpsk_constellation()</value>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(206, 116)</value>
+      <value>(791, 46)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -162,22 +200,26 @@
     </param>
   </block>
   <block>
-    <key>import</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>import_0</value>
+      <value>const</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>import</key>
-      <value>from gnuradio import digital</value>
+      <key>value</key>
+      <value>digital.qpsk_constellation()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(-1, 61)</value>
+      <value>(206, 116)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -185,22 +227,54 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>analog_random_source_x</key>
     <param>
       <key>id</key>
-      <value>spb</value>
+      <value>analog_random_source_x</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>4.2563</value>
+      <key>type</key>
+      <value>byte</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>const.arity()</value>
+    </param>
+    <param>
+      <key>num_samps</key>
+      <value>10000000</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(300, 0)</value>
+      <value>(-1, 163)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -208,22 +282,54 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>digital_chunks_to_symbols_xx</key>
     <param>
       <key>id</key>
-      <value>sig_amp</value>
+      <value>digital_chunks_to_symbols_xx</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
+      <key>in_type</key>
+      <value>byte</value>
+    </param>
+    <param>
+      <key>out_type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>symbol_table</key>
+      <value>const.points()</value>
+    </param>
+    <param>
+      <key>dimension</key>
       <value>1</value>
     </param>
     <param>
+      <key>num_ports</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(791, 46)</value>
+      <value>(203, 178)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -253,6 +359,26 @@
       <value>1</value>
     </param>
     <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(258, 431)</value>
     </param>
@@ -292,6 +418,26 @@
       <value>42</value>
     </param>
     <param>
+      <key>block_tags</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(57, 401)</value>
     </param>
@@ -301,22 +447,58 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>pfb_arb_resampler_xxx</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>pfb_arb_resampler_xxx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>32000</value>
+      <key>type</key>
+      <value>ccf</value>
+    </param>
+    <param>
+      <key>rrate</key>
+      <value>spb</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value>firdes.root_raised_cosine(nfilts, nfilts, 1.0, rolloff, 44*nfilts)</value>
+    </param>
+    <param>
+      <key>nfilts</key>
+      <value>32</value>
+    </param>
+    <param>
+      <key>atten</key>
+      <value>100</value>
+    </param>
+    <param>
+      <key>samp_delay</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(267, 357)</value>
+      <value>(458, 179)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -324,22 +506,26 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>import</key>
     <param>
       <key>id</key>
-      <value>rolloff</value>
+      <value>import_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>.35</value>
+      <key>import</key>
+      <value>from gnuradio import digital</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(482, 335)</value>
+      <value>(-1, 61)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -347,22 +533,46 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>blocks_multiply_const_vxx</key>
     <param>
       <key>id</key>
-      <value>nfilts</value>
+      <value>blocks_multiply_const_vxx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>32</value>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>const</key>
+      <value>sig_amp</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(562, 335)</value>
+      <value>(760, 159)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -370,10 +580,10 @@
     </param>
   </block>
   <block>
-    <key>digital_pfb_clock_sync_xxx</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>digital_pfb_clock_sync_xxx_0</value>
+      <value>qtgui_time_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -381,39 +591,323 @@
     </param>
     <param>
       <key>type</key>
-      <value>ccf</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>sps</key>
-      <value>spb</value>
+      <key>name</key>
+      <value>Error</value>
     </param>
     <param>
-      <key>loop_bw</key>
-      <value>time_bw</value>
+      <key>size</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>firdes.root_raised_cosine(nfilts, nfilts*spb, 1.0, rolloff, 44*nfilts)</value>
+      <key>srate</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>filter_size</key>
-      <value>nfilts</value>
+      <key>autoscale</key>
+      <value>False</value>
     </param>
     <param>
-      <key>init_phase</key>
-      <value>16</value>
+      <key>ymin</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>max_dev</key>
-      <value>1.5</value>
+      <key>ymax</key>
+      <value>1</value>
     </param>
     <param>
-      <key>osps</key>
+      <key>nconnections</key>
       <value>1</value>
     </param>
     <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@3</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_chan</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(467, 403)</value>
+      <value>(1020, 128)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -421,38 +915,50 @@
     </param>
   </block>
   <block>
-    <key>pfb_arb_resampler_xxx</key>
+    <key>qtgui_tab_widget</key>
     <param>
       <key>id</key>
-      <value>pfb_arb_resampler_xxx_0</value>
+      <value>notebook</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>ccf</value>
+      <key>num_tabs</key>
+      <value>4</value>
     </param>
     <param>
-      <key>rrate</key>
-      <value>spb</value>
+      <key>label0</key>
+      <value>Error</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>firdes.root_raised_cosine(nfilts, nfilts, 1.0, rolloff, 44*nfilts)</value>
+      <key>label1</key>
+      <value>Phase</value>
     </param>
     <param>
-      <key>nfilts</key>
-      <value>32</value>
+      <key>label2</key>
+      <value>Freq</value>
     </param>
     <param>
-      <key>atten</key>
-      <value>100</value>
+      <key>label3</key>
+      <value>Resampled Signal</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value>Tab 4</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>1,1,5,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(458, 179)</value>
+      <value>(485, 554)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -460,74 +966,176 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0_1</value>
+      <value>interpratio</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>label</key>
+      <value>Timing Offset</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Error</value>
+      <key>value</key>
+      <value>1</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>start</key>
+      <value>.99</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>.5</value>
+      <key>stop</key>
+      <value>1.01</value>
     </param>
     <param>
-      <key>v_offset</key>
-      <value>0</value>
+      <key>step</key>
+      <value>0.0001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>2,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(6, 526)</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>id</key>
+      <value>noise_amp</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Channel Noise</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>step</key>
+      <value>.001</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>3,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,3</value>
+      <key>_coordinate</key>
+      <value>(130, 528)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
+    <param>
+      <key>id</key>
+      <value>freq_offset</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>label</key>
+      <value>Frequency Offset</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>-.5</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>.5</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.01</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>4,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(961, 84)</value>
+      <value>(268, 527)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -535,10 +1143,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0_0</value>
+      <value>qtgui_time_sink_x_1_1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -549,60 +1157,320 @@
       <value>float</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <key>name</key>
+      <value>Phase</value>
     </param>
     <param>
-      <key>samp_rate</key>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>9</value>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@1</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,1</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>color4</key>
+      <value>"black"</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(991, 592)</value>
+      <value>(1014, 622)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -610,10 +1478,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>digital_pfb_clock_sync_xxx</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>digital_pfb_clock_sync_xxx_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -621,63 +1489,55 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <value>ccf</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>sps</key>
+      <value>spb</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>0</value>
+      <key>loop_bw</key>
+      <value>time_bw</value>
     </param>
     <param>
-      <key>v_offset</key>
-      <value>0</value>
+      <key>taps</key>
+      <value>firdes.root_raised_cosine(nfilts, nfilts*spb, 1.0, rolloff, 44*nfilts)</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>0</value>
+      <key>filter_size</key>
+      <value>nfilts</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>init_phase</key>
+      <value>16</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>max_dev</key>
+      <value>1.5</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>osps</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
-    </param>
-    <param>
-      <key>grid_pos</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1029, 243)</value>
+      <value>(467, 403)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -685,10 +1545,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0</value>
+      <value>qtgui_time_sink_x_1_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -699,60 +1559,320 @@
       <value>float</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Error</value>
+      <key>name</key>
+      <value>Rate</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>samp_rate</key>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>3</value>
+      <key>autoscale</key>
+      <value>True</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value>notebook@2</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>style1</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,0</value>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1029, 335)</value>
+      <value>(1018, 503)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -760,10 +1880,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0_0_0_0</value>
+      <value>qtgui_time_sink_x_1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -774,60 +1894,320 @@
       <value>float</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <key>name</key>
+      <value>Error</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>samp_rate</key>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>1.25</value>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>gui_hint</key>
+      <value>notebook@0</value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>tr_chan</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>label1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>style8</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value>notebook_0,2</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>style10</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1024, 462)</value>
+      <value>(1017, 378)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -835,10 +2215,10 @@
     </param>
   </block>
   <block>
-    <key>blocks_multiply_const_vxx</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>blocks_multiply_const_vxx_0</value>
+      <value>qtgui_time_sink_x_0_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -849,236 +2229,320 @@
       <value>complex</value>
     </param>
     <param>
-      <key>const</key>
-      <value>sig_amp</value>
+      <key>name</key>
+      <value>Scope Plot</value>
     </param>
     <param>
-      <key>vlen</key>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>autoscale</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
       <value>1</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(760, 159)</value>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>interpratio</value>
+      <key>tr_chan</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Timing Offset</value>
+      <key>label1</key>
+      <value></value>
     </param>
     <param>
-      <key>value</key>
-      <value>1.00</value>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>min</key>
-      <value>0.99</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>max</key>
-      <value>1.01</value>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>width2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>color2</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(2,2,1,1)</value>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>label3</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(4, 530)</value>
+      <key>width3</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>180</value>
+      <key>color3</key>
+      <value>"green"</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>time_bw</value>
+      <key>style3</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>marker3</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Timing Loop BW</value>
+      <key>alpha3</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>label4</key>
+      <value></value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.1</value>
+      <key>color4</key>
+      <value>"black"</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>style4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>marker4</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>alpha4</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(1,2,1,1)</value>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(552, 4)</value>
+      <key>width6</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>color6</key>
+      <value>"magenta"</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>noise_amp</value>
+      <key>style6</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>marker6</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Channel Noise</value>
+      <key>alpha6</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>label7</key>
+      <value></value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>width7</key>
+      <value>1</value>
     </param>
     <param>
-      <key>max</key>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
       <value>1.0</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>label8</key>
+      <value></value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>style8</key>
+      <value>1</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(3,2,1,1)</value>
+      <key>marker8</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(149, 530)</value>
+      <key>width9</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>color9</key>
+      <value>"dark green"</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>freq_offset</value>
+      <key>style9</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>marker9</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Frequency Offset</value>
+      <key>alpha9</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>label10</key>
+      <value></value>
     </param>
     <param>
-      <key>min</key>
-      <value>-0.5</value>
+      <key>width10</key>
+      <value>1</value>
     </param>
     <param>
-      <key>max</key>
-      <value>0.5</value>
+      <key>color10</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>1000</value>
+      <key>style10</key>
+      <value>1</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>marker10</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>alpha10</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(4,2,1,1)</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(293, 530)</value>
+      <value>(1029, 281)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1086,34 +2550,58 @@
     </param>
   </block>
   <block>
-    <key>notebook</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>notebook_0</value>
+      <value>time_bw</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.NB_TOP</value>
+      <key>label</key>
+      <value>Timing Loop BW</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>.1</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.001</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>labels</key>
-      <value>['error', 'phase', 'freq', 'Resampled Signal']</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>(1,1,5,1)</value>
+      <key>min_len</key>
+      <value>200</value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>gui_hint</key>
+      <value>1,2,1,1</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(443, 577)</value>
+      <value>(451, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1127,63 +2615,63 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0_0_0</sink_block_id>
-    <source_key>2</source_key>
+    <source_block_id>pfb_arb_resampler_xxx_0</source_block_id>
+    <sink_block_id>blocks_multiply_const_vxx_0</sink_block_id>
+    <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0_1</sink_block_id>
+    <source_block_id>digital_chunks_to_symbols_xx</source_block_id>
+    <sink_block_id>pfb_arb_resampler_xxx_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>pfb_arb_resampler_xxx_0</source_block_id>
-    <sink_block_id>blocks_multiply_const_vxx_0</sink_block_id>
+    <source_block_id>analog_random_source_x</source_block_id>
+    <sink_block_id>digital_chunks_to_symbols_xx</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_chunks_to_symbols_xx</source_block_id>
-    <sink_block_id>pfb_arb_resampler_xxx_0</sink_block_id>
+    <source_block_id>channels_channel_model_0</source_block_id>
+    <sink_block_id>blocks_throttle_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>analog_random_source_x</source_block_id>
-    <sink_block_id>digital_chunks_to_symbols_xx</sink_block_id>
+    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
+    <sink_block_id>channels_channel_model_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0_0</sink_block_id>
-    <source_key>3</source_key>
+    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0_0</sink_block_id>
-    <source_key>1</source_key>
+    <sink_block_id>qtgui_time_sink_x_0_0</sink_block_id>
+    <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
     <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
-    <source_key>0</source_key>
+    <sink_block_id>qtgui_time_sink_x_1</sink_block_id>
+    <source_key>1</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>channels_channel_model_0</source_block_id>
-    <sink_block_id>blocks_throttle_0</sink_block_id>
-    <source_key>0</source_key>
+    <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_1_1</sink_block_id>
+    <source_key>3</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_multiply_const_vxx_0</source_block_id>
-    <sink_block_id>channels_channel_model_0</sink_block_id>
-    <source_key>0</source_key>
+    <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_1_0</sink_block_id>
+    <source_key>2</source_key>
     <sink_key>0</sink_key>
   </connection>
 </flow_graph>
diff --git a/gr-digital/examples/ofdm/ofdm_loopback.grc b/gr-digital/examples/ofdm/ofdm_loopback.grc
index a2c93145c4..fbb26cae92 100644
--- a/gr-digital/examples/ofdm/ofdm_loopback.grc
+++ b/gr-digital/examples/ofdm/ofdm_loopback.grc
@@ -1,59 +1,27 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sun Nov  3 19:13:00 2013</timestamp>
+  <timestamp>Wed Jul  9 15:53:31 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>ofdm_loopback_example</value>
+      <value>len_tag_key</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value>OFDM Loopback Example</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
-    </param>
-    <param>
-      <key>description</key>
-      <value>Transmit a pre-defined signal (a complex sine) as OFDM packets.</value>
-    </param>
-    <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
-    </param>
-    <param>
-      <key>category</key>
-      <value>Custom</value>
-    </param>
-    <param>
-      <key>run_options</key>
-      <value>prompt</value>
-    </param>
-    <param>
-      <key>run</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>max_nouts</key>
-      <value>0</value>
+      <key>value</key>
+      <value>"packet_len"</value>
     </param>
     <param>
-      <key>realtime_scheduling</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(0, -1)</value>
+      <value>(283, 6)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -75,6 +43,10 @@
       <value>100000</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(493, 7)</value>
     </param>
@@ -98,31 +70,12 @@
       <value>64</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(403, 8)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>len_tag_key</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>"packet_len"</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(283, 6)</value>
+      <value>(403, 8)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -144,6 +97,10 @@
       <value>50</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(182, 6)</value>
     </param>
@@ -183,6 +140,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -191,6 +152,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(5, 124)</value>
     </param>
@@ -200,10 +165,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>blocks_tag_debug</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0</value>
+      <value>blocks_tag_debug_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -211,83 +176,90 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>byte</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Rx Spectrum</value>
+      <key>name</key>
+      <value>Rx Packets</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>100e3</value>
+      <key>filter</key>
+      <value>""</value>
     </param>
     <param>
-      <key>baseband_freq</key>
-      <value>0</value>
+      <key>num_inputs</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>display</key>
+      <value>True</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>0</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>_coordinate</key>
+      <value>(325, 483)</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>15</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>blocks_stream_to_tagged_stream</key>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>id</key>
+      <value>blocks_stream_to_tagged_stream_0</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>type</key>
+      <value>byte</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>packet_len</key>
+      <value>packet_len</value>
+    </param>
+    <param>
+      <key>len_tag_key</key>
+      <value>len_tag_key</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(51, 500)</value>
+      <value>(282, 132)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -295,73 +267,66 @@
     </param>
   </block>
   <block>
-    <key>blocks_tag_debug</key>
+    <key>digital_ofdm_rx</key>
     <param>
       <key>id</key>
-      <value>blocks_tag_debug_0</value>
+      <value>digital_ofdm_rx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>byte</value>
-    </param>
-    <param>
-      <key>name</key>
-      <value>Rx Packets</value>
+      <key>fft_len</key>
+      <value>fft_len</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>cp_len</key>
+      <value>fft_len/4</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>packet_len_key</key>
+      <value>"rx_len"</value>
     </param>
     <param>
-      <key>display</key>
-      <value>True</value>
+      <key>occupied_carriers</key>
+      <value>()</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>pilot_carriers</key>
+      <value>()</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(325, 483)</value>
+      <key>pilot_symbols</key>
+      <value>()</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>sync_word1</key>
+      <value>()</value>
     </param>
-  </block>
-  <block>
-    <key>blocks_stream_to_tagged_stream</key>
     <param>
-      <key>id</key>
-      <value>blocks_stream_to_tagged_stream_0</value>
+      <key>sync_word2</key>
+      <value>()</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>header_mod</key>
+      <value>"BPSK"</value>
     </param>
     <param>
-      <key>type</key>
-      <value>byte</value>
+      <key>payload_mod</key>
+      <value>"QPSK"</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>scramble_bits</key>
+      <value>False</value>
     </param>
     <param>
-      <key>packet_len</key>
-      <value>packet_len</value>
+      <key>log</key>
+      <value>False</value>
     </param>
     <param>
-      <key>len_tag_key</key>
-      <value>len_tag_key</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>affinity</key>
@@ -372,8 +337,12 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(282, 132)</value>
+      <value>(52, 374)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -381,10 +350,10 @@
     </param>
   </block>
   <block>
-    <key>digital_ofdm_rx</key>
+    <key>digital_ofdm_tx</key>
     <param>
       <key>id</key>
-      <value>digital_ofdm_rx_0</value>
+      <value>digital_ofdm_tx_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -400,7 +369,7 @@
     </param>
     <param>
       <key>packet_len_key</key>
-      <value>"rx_len"</value>
+      <value>len_tag_key</value>
     </param>
     <param>
       <key>occupied_carriers</key>
@@ -431,6 +400,10 @@
       <value>"QPSK"</value>
     </param>
     <param>
+      <key>rolloff</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>scramble_bits</key>
       <value>False</value>
     </param>
@@ -439,6 +412,10 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -447,8 +424,12 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(52, 374)</value>
+      <value>(557, 94)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -456,16 +437,44 @@
     </param>
   </block>
   <block>
-    <key>blocks_uchar_to_float</key>
+    <key>channels_channel_model</key>
     <param>
       <key>id</key>
-      <value>blocks_uchar_to_float_0</value>
+      <value>channels_channel_model_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>noise_voltage</key>
+      <value>noise_voltage</value>
+    </param>
+    <param>
+      <key>freq_offset</key>
+      <value>freq_offset * 1.0/fft_len</value>
+    </param>
+    <param>
+      <key>epsilon</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value>1.0 + 1.0j</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>block_tags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -474,19 +483,23 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(326, 408)</value>
+      <value>(453, 244)</value>
     </param>
     <param>
       <key>_rotation</key>
-      <value>0</value>
+      <value>180</value>
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>blocks_throttle</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>blocks_throttle_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -494,59 +507,270 @@
     </param>
     <param>
       <key>type</key>
-      <value>float</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>1.0</value>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>v_scale</key>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>v_offset</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
+      <key>_coordinate</key>
+      <value>(177, 281)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>180</value>
+    </param>
+  </block>
+  <block>
+    <key>qtgui_freq_sink_x</key>
+    <param>
+      <key>id</key>
+      <value>qtgui_freq_sink_x_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>name</key>
+      <value>Rx Spectrum</value>
+    </param>
+    <param>
+      <key>fftsize</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+    </param>
+    <param>
+      <key>fc</key>
       <value>0</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>bw</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>xy_mode</key>
+      <key>autoscale</key>
       <value>False</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>average</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-140</value>
+    </param>
+    <param>
+      <key>ymax</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value>Rx Spectrum</value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
       <value>1</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
       <value></value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>affinity</key>
@@ -554,7 +778,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(530, 382)</value>
+      <value>(52, 527)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -562,78 +786,117 @@
     </param>
   </block>
   <block>
-    <key>digital_ofdm_tx</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>id</key>
-      <value>digital_ofdm_tx_0</value>
+      <value>freq_offset</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>fft_len</key>
-      <value>fft_len</value>
+      <key>label</key>
+      <value>Frequency Offset (Multiples of Sub-carrier spacing)</value>
     </param>
     <param>
-      <key>cp_len</key>
-      <value>fft_len/4</value>
+      <key>value</key>
+      <value>0</value>
     </param>
     <param>
-      <key>packet_len_key</key>
-      <value>len_tag_key</value>
+      <key>start</key>
+      <value>-3</value>
     </param>
     <param>
-      <key>occupied_carriers</key>
-      <value>()</value>
+      <key>stop</key>
+      <value>3</value>
     </param>
     <param>
-      <key>pilot_carriers</key>
-      <value>()</value>
+      <key>step</key>
+      <value>.01</value>
     </param>
     <param>
-      <key>pilot_symbols</key>
-      <value>()</value>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
     <param>
-      <key>sync_word1</key>
-      <value>()</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>sync_word2</key>
-      <value>()</value>
+      <key>min_len</key>
+      <value>200</value>
     </param>
     <param>
-      <key>header_mod</key>
-      <value>"BPSK"</value>
+      <key>gui_hint</key>
+      <value></value>
     </param>
     <param>
-      <key>payload_mod</key>
-      <value>"QPSK"</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>rolloff</key>
+      <key>_coordinate</key>
+      <value>(458, 518)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
     <param>
-      <key>scramble_bits</key>
-      <value>False</value>
+      <key>id</key>
+      <value>noise_voltage</value>
     </param>
     <param>
-      <key>log</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>label</key>
+      <value>Noise Amplitude</value>
     </param>
     <param>
-      <key>minoutbuf</key>
+      <key>value</key>
+      <value>0.1</value>
+    </param>
+    <param>
+      <key>start</key>
       <value>0</value>
     </param>
     <param>
+      <key>stop</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>.01</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(557, 94)</value>
+      <value>(652, 501)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -641,40 +904,83 @@
     </param>
   </block>
   <block>
-    <key>channels_channel_model</key>
+    <key>options</key>
     <param>
       <key>id</key>
-      <value>channels_channel_model_0</value>
+      <value>ofdm_loopback_example</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>noise_voltage</key>
-      <value>noise_voltage</value>
+      <key>title</key>
+      <value>OFDM Loopback Example</value>
     </param>
     <param>
-      <key>freq_offset</key>
-      <value>freq_offset * 1.0/fft_len</value>
+      <key>author</key>
+      <value></value>
     </param>
     <param>
-      <key>epsilon</key>
-      <value>1.0</value>
+      <key>description</key>
+      <value>Transmit a pre-defined signal (a complex sine) as OFDM packets.</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>1.0 + 1.0j</value>
+      <key>window_size</key>
+      <value>1280, 1024</value>
     </param>
     <param>
-      <key>seed</key>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
       <value>0</value>
     </param>
     <param>
-      <key>block_tags</key>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(0, -1)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_uchar_to_float</key>
+    <param>
+      <key>id</key>
+      <value>blocks_uchar_to_float_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -683,19 +989,23 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(453, 244)</value>
+      <value>(326, 408)</value>
     </param>
     <param>
       <key>_rotation</key>
-      <value>180</value>
+      <value>0</value>
     </param>
   </block>
   <block>
-    <key>blocks_throttle</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>blocks_throttle_0</value>
+      <value>qtgui_time_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -703,137 +1013,323 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>float</value>
     </param>
     <param>
-      <key>samples_per_second</key>
+      <key>name</key>
+      <value>Scope Plot</value>
+    </param>
+    <param>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
       <value>samp_rate</value>
     </param>
     <param>
-      <key>vlen</key>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
       <value>1</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>nconnections</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
       <value>0</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(177, 281)</value>
+      <key>tr_chan</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>180</value>
+      <key>tr_tag</key>
+      <value>""</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>freq_offset</value>
+      <key>label1</key>
+      <value></value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Frequency Offset (Multiples of Sub-carrier spacing)</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0</value>
+      <key>style1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>min</key>
-      <value>-3</value>
+      <key>marker1</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>max</key>
-      <value>3</value>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>100</value>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>marker2</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>alpha2</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>label3</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(466, 508)</value>
+      <key>width4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>color4</key>
+      <value>"black"</value>
     </param>
-  </block>
-  <block>
-    <key>variable_slider</key>
     <param>
-      <key>id</key>
-      <value>noise_voltage</value>
+      <key>style4</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>marker4</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Noise Amplitude</value>
+      <key>alpha4</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>value</key>
-      <value>0.01</value>
+      <key>label5</key>
+      <value></value>
     </param>
     <param>
-      <key>min</key>
-      <value>0</value>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
     </param>
     <param>
-      <key>max</key>
+      <key>width7</key>
       <value>1</value>
     </param>
     <param>
-      <key>num_steps</key>
-      <value>100</value>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>marker7</key>
+      <value>-1</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>alpha7</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>label8</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(653, 505)</value>
+      <value>(550, 382)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -848,12 +1344,6 @@
   </connection>
   <connection>
     <source_block_id>blocks_throttle_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>blocks_throttle_0</source_block_id>
     <sink_block_id>digital_ofdm_rx_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
@@ -883,14 +1373,20 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_uchar_to_float_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+    <source_block_id>channels_channel_model_0</source_block_id>
+    <sink_block_id>blocks_throttle_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>channels_channel_model_0</source_block_id>
-    <sink_block_id>blocks_throttle_0</sink_block_id>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>qtgui_freq_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_uchar_to_float_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
diff --git a/gr-digital/examples/ofdm/rx_ofdm.grc b/gr-digital/examples/ofdm/rx_ofdm.grc
index 3853853a27..0d00567712 100644
--- a/gr-digital/examples/ofdm/rx_ofdm.grc
+++ b/gr-digital/examples/ofdm/rx_ofdm.grc
@@ -1,59 +1,27 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sun Feb  2 14:07:51 2014</timestamp>
+  <timestamp>Wed Jul  9 15:50:17 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>rx_ofdm</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value>OFDM Rx</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
-    </param>
-    <param>
-      <key>description</key>
-      <value>Example of an OFDM receiver</value>
-    </param>
-    <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
-    </param>
-    <param>
-      <key>category</key>
-      <value>Custom</value>
-    </param>
-    <param>
-      <key>run_options</key>
-      <value>prompt</value>
-    </param>
-    <param>
-      <key>run</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>max_nouts</key>
-      <value>0</value>
+      <key>value</key>
+      <value>10000</value>
     </param>
     <param>
-      <key>realtime_scheduling</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(0, -1)</value>
+      <value>(170, 65)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -64,7 +32,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>payload_mod</value>
+      <value>header_formatter</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -72,11 +40,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.constellation_qpsk()</value>
+      <value>digital.packet_header_ofdm(occupied_carriers, n_syms=1, len_tag_key=packet_length_tag_key, frame_len_tag_key=length_tag_key, bits_per_header_sym=header_mod.bits_per_symbol(), bits_per_payload_sym=payload_mod.bits_per_symbol(), scramble_header=False)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(663, 1)</value>
+      <value>(855, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -87,7 +59,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>packet_length_tag_key</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -95,11 +67,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>10000</value>
+      <value>"packet_len"</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(170, 65)</value>
+      <value>(1132, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -110,7 +86,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>header_equalizer</value>
+      <value>length_tag_key</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -118,11 +94,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.ofdm_equalizer_simpledfe(fft_len, header_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols)</value>
+      <value>"frame_len"</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(931, 69)</value>
+      <value>(367, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -133,7 +113,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>payload_equalizer</value>
+      <value>occupied_carriers</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -141,11 +121,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.ofdm_equalizer_simpledfe(fft_len, payload_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols, 1)</value>
+      <value>(range(-26, -21) + range(-20, -7) + range(-6, 0) + range(1, 7) + range(8, 21) + range(22, 27),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1112, 73)</value>
+      <value>(541, 70)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -156,7 +140,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sync_word2</value>
+      <value>pilot_symbols</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -164,11 +148,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>[0j, 0j, 0j, 0j, 0j, 0j, (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1 +0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), 0j, (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), 0j, 0j, 0j, 0j, 0j]</value>
+      <value>((1, 1, 1, -1,),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(399, 66)</value>
+      <value>(813, 70)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -179,7 +167,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sync_word1</value>
+      <value>pilot_carriers</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -187,11 +175,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>[0., 0., 0., 0., 0., 0., 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 0., 0., 0., 0., 0.]</value>
+      <value>((-21, -7, 7, 21,),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(255, 67)</value>
+      <value>(692, 70)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -202,7 +194,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>fft_len</value>
+      <value>packet_len</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -210,11 +202,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>64</value>
+      <value>96</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(301, -1)</value>
+      <value>(1034, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -236,6 +232,10 @@
       <value>digital.constellation_bpsk()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(490, 0)</value>
     </param>
@@ -248,7 +248,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>packet_len</value>
+      <value>fft_len</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -256,34 +256,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>96</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(1034, 0)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>pilot_carriers</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <value>64</value>
     </param>
     <param>
-      <key>value</key>
-      <value>((-21, -7, 7, 21,),)</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(692, 70)</value>
+      <value>(301, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -294,7 +275,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>pilot_symbols</value>
+      <value>sync_word1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -302,11 +283,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>((1, 1, 1, -1,),)</value>
+      <value>[0., 0., 0., 0., 0., 0., 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 0., 0., 0., 0., 0.]</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(813, 70)</value>
+      <value>(255, 67)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -317,7 +302,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>occupied_carriers</value>
+      <value>sync_word2</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -325,11 +310,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>(range(-26, -21) + range(-20, -7) + range(-6, 0) + range(1, 7) + range(8, 21) + range(22, 27),)</value>
+      <value>[0j, 0j, 0j, 0j, 0j, 0j, (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1 +0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), 0j, (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), 0j, 0j, 0j, 0j, 0j]</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(541, 70)</value>
+      <value>(399, 66)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -340,7 +329,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>length_tag_key</value>
+      <value>payload_equalizer</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -348,11 +337,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>"frame_len"</value>
+      <value>digital.ofdm_equalizer_simpledfe(fft_len, payload_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols, 1)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(367, -1)</value>
+      <value>(1112, 73)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -363,7 +356,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>packet_length_tag_key</value>
+      <value>header_equalizer</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -371,11 +364,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>"packet_len"</value>
+      <value>digital.ofdm_equalizer_simpledfe(fft_len, header_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1132, 0)</value>
+      <value>(931, 69)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -386,7 +383,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>header_formatter</value>
+      <value>payload_mod</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -394,11 +391,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.packet_header_ofdm(occupied_carriers, n_syms=1, len_tag_key=packet_length_tag_key, frame_len_tag_key=length_tag_key, bits_per_header_sym=header_mod.bits_per_symbol(), bits_per_payload_sym=payload_mod.bits_per_symbol(), scramble_header=False)</value>
+      <value>digital.constellation_qpsk()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(855, 0)</value>
+      <value>(663, 1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -420,6 +421,10 @@
       <value>from gnuradio.digital.utils import tagged_streams</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(163, 0)</value>
     </param>
@@ -459,6 +464,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -494,6 +503,10 @@
       <value>-2.0/fft_len</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -541,6 +554,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -584,6 +601,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -627,6 +648,10 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -662,6 +687,10 @@
       <value>header_formatter.base()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -697,6 +726,10 @@
       <value>header_mod.base()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -752,6 +785,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -822,6 +859,10 @@
       <value>packet_length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -877,6 +918,10 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -932,6 +977,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1056,6 +1105,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1111,6 +1164,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1173,6 +1230,10 @@
       <value>packet_length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1220,6 +1281,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1255,6 +1320,10 @@
       <value>payload_mod.base()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1333,6 +1402,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1380,6 +1453,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1463,6 +1540,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1534,6 +1615,10 @@
       <value>()</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1593,6 +1678,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1652,6 +1741,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1699,6 +1792,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1719,6 +1816,69 @@
       <value>0</value>
     </param>
   </block>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>rx_ofdm</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>OFDM Rx</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value></value>
+    </param>
+    <param>
+      <key>description</key>
+      <value>Example of an OFDM receiver</value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(1, 0)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
   <connection>
     <source_block_id>analog_random_source_x_0</source_block_id>
     <sink_block_id>blocks_stream_to_tagged_stream_0</sink_block_id>
diff --git a/gr-digital/examples/ofdm/tx_ofdm.grc b/gr-digital/examples/ofdm/tx_ofdm.grc
index 80d7f7f9e4..368f16bd80 100644
--- a/gr-digital/examples/ofdm/tx_ofdm.grc
+++ b/gr-digital/examples/ofdm/tx_ofdm.grc
@@ -1,59 +1,27 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sun Nov  3 18:45:28 2013</timestamp>
+  <timestamp>Wed Jul  9 15:49:47 2014</timestamp>
   <block>
-    <key>options</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>tx_ofdm</value>
+      <value>sync_word2</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>title</key>
-      <value>OFDM Tx</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
-    </param>
-    <param>
-      <key>description</key>
-      <value>Example of an OFDM Transmitter</value>
-    </param>
-    <param>
-      <key>window_size</key>
-      <value>1280, 1024</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>wx_gui</value>
-    </param>
-    <param>
-      <key>category</key>
-      <value>Custom</value>
-    </param>
-    <param>
-      <key>run_options</key>
-      <value>run</value>
-    </param>
-    <param>
-      <key>run</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>max_nouts</key>
-      <value>0</value>
+      <key>value</key>
+      <value>[0, 0, 0, 0, 0, 0, -1, -1, -1, -1, 1, 1, -1, -1, -1, 1, -1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, -1, 1, -1, 0, 1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, -1, -1, -1, 0, 0, 0, 0, 0] </value>
     </param>
     <param>
-      <key>realtime_scheduling</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(0, -1)</value>
+      <value>(496, 128)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -64,7 +32,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sync_word1</value>
+      <value>length_tag_key</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -72,11 +40,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>[0., 0., 0., 0., 0., 0., 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 0., 0., 0., 0., 0.]</value>
+      <value>"packet_len"</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(352, 128)</value>
+      <value>(352, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -87,7 +59,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sync_word2</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -95,11 +67,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>[0, 0, 0, 0, 0, 0, -1, -1, -1, -1, 1, 1, -1, -1, -1, 1, -1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, -1, 1, -1, 0, 1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, -1, -1, -1, 0, 0, 0, 0, 0] </value>
+      <value>100000</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(496, 128)</value>
+      <value>(255, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -110,7 +86,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>pilot_symbols</value>
+      <value>rolloff</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -118,11 +94,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>((1, 1, 1, -1,),)</value>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(601, 64)</value>
+      <value>(898, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -133,7 +113,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>occupied_carriers</value>
+      <value>payload_mod</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -141,11 +121,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>(range(-26, -21) + range(-20, -7) + range(-6, 0) + range(1, 7) + range(8, 21) + range(22, 27),)</value>
+      <value>digital.constellation_qpsk()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(329, 64)</value>
+      <value>(734, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -156,7 +140,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>pilot_carriers</value>
+      <value>header_mod</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -164,11 +148,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>((-21, -7, 7, 21,),)</value>
+      <value>digital.constellation_bpsk()</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(480, 64)</value>
+      <value>(567, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -179,7 +167,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>header_formatter</value>
+      <value>packet_len</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -187,11 +175,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.packet_header_ofdm(occupied_carriers, 1, length_tag_key)</value>
+      <value>96</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(708, 64)</value>
+      <value>(476, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -213,6 +205,10 @@
       <value>64</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(181, -1)</value>
     </param>
@@ -225,7 +221,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>packet_len</value>
+      <value>header_formatter</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -233,34 +229,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>96</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(476, 0)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>header_mod</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <value>digital.packet_header_ofdm(occupied_carriers, 1, length_tag_key)</value>
     </param>
     <param>
-      <key>value</key>
-      <value>digital.constellation_bpsk()</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(567, 0)</value>
+      <value>(708, 64)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -271,7 +248,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>payload_mod</value>
+      <value>pilot_carriers</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -279,11 +256,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>digital.constellation_qpsk()</value>
+      <value>((-21, -7, 7, 21,),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(734, 0)</value>
+      <value>(480, 64)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -294,7 +275,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>rolloff</value>
+      <value>occupied_carriers</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -302,11 +283,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>0</value>
+      <value>(range(-26, -21) + range(-20, -7) + range(-6, 0) + range(1, 7) + range(8, 21) + range(22, 27),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(898, -1)</value>
+      <value>(329, 64)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -317,7 +302,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>pilot_symbols</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -325,11 +310,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>100000</value>
+      <value>((1, 1, 1, -1,),)</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(255, 0)</value>
+      <value>(601, 64)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -340,7 +329,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>length_tag_key</value>
+      <value>sync_word1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -348,11 +337,15 @@
     </param>
     <param>
       <key>value</key>
-      <value>"packet_len"</value>
+      <value>[0., 0., 0., 0., 0., 0., 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 0., 0., 0., 0., 0.]</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(352, 0)</value>
+      <value>(352, 128)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -397,6 +390,10 @@
       <value>import numpy</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(237, 93)</value>
     </param>
@@ -420,6 +417,10 @@
       <value>from gnuradio.digital.utils import tagged_streams</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(99, 93)</value>
     </param>
@@ -443,6 +444,10 @@
       <value>import random</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(3, 94)</value>
     </param>
@@ -528,6 +533,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -536,6 +545,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(212, 450)</value>
     </param>
@@ -625,6 +638,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -633,6 +650,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(414, 548)</value>
     </param>
@@ -664,6 +685,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -672,6 +697,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(209, 747)</value>
     </param>
@@ -711,6 +740,10 @@
       <value>1</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -719,6 +752,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(214, 376)</value>
     </param>
@@ -758,6 +795,10 @@
       <value>True</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -766,6 +807,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(13, 220)</value>
     </param>
@@ -805,6 +850,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -813,6 +862,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(510, 428)</value>
     </param>
@@ -848,6 +901,10 @@
       <value>length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -856,6 +913,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(632, 564)</value>
     </param>
@@ -887,6 +948,10 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -895,6 +960,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(372, 747)</value>
     </param>
@@ -930,6 +999,10 @@
       <value>False</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -938,6 +1011,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(710, 301)</value>
     </param>
@@ -961,6 +1038,14 @@
       <value>header_formatter.formatter()</value>
     </param>
     <param>
+      <key>len_tag_key</key>
+      <value>"packet_len"</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -969,6 +1054,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(703, 242)</value>
     </param>
@@ -1004,6 +1093,10 @@
       <value>length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1012,6 +1105,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(193, 235)</value>
     </param>
@@ -1108,6 +1205,10 @@
       <value>length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1116,6 +1217,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(430, 235)</value>
     </param>
@@ -1159,6 +1264,10 @@
       <value>length_tag_key</value>
     </param>
     <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
@@ -1167,6 +1276,10 @@
       <value>0</value>
     </param>
     <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
       <value>(192, 540)</value>
     </param>
@@ -1222,78 +1335,141 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>digital_ofdm_rx</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>digital_ofdm_rx_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>fft_len</key>
+      <value>fft_len</value>
     </param>
     <param>
-      <key>title</key>
-      <value>Scope Plot</value>
+      <key>cp_len</key>
+      <value>fft_len/4</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>packet_len_key</key>
+      <value>"length"</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>0</value>
+      <key>occupied_carriers</key>
+      <value>occupied_carriers</value>
     </param>
     <param>
-      <key>v_offset</key>
-      <value>0</value>
+      <key>pilot_carriers</key>
+      <value>pilot_carriers</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>0</value>
+      <key>pilot_symbols</key>
+      <value>pilot_symbols</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>sync_word1</key>
+      <value>sync_word1</value>
+    </param>
+    <param>
+      <key>sync_word2</key>
+      <value>sync_word2</value>
+    </param>
+    <param>
+      <key>header_mod</key>
+      <value>"BPSK"</value>
+    </param>
+    <param>
+      <key>payload_mod</key>
+      <value>"QPSK"</value>
     </param>
     <param>
-      <key>xy_mode</key>
+      <key>scramble_bits</key>
       <value>False</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>log</key>
+      <value>False</value>
     </param>
     <param>
-      <key>win_size</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
-      <value></value>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(439, 823)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>channels_channel_model</key>
+    <param>
+      <key>id</key>
+      <value>channels_channel_model_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>noise_voltage</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>freq_offset</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>epsilon</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value>1.0 + 1.0j</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
     </param>
     <param>
-      <key>trig_mode</key>
-      <value>wxgui.TRIG_MODE_AUTO</value>
+      <key>block_tags</key>
+      <value>True</value>
     </param>
     <param>
-      <key>y_axis_label</key>
-      <value>Counts</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
       <key>affinity</key>
       <value></value>
     </param>
     <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(992, 716)</value>
+      <value>(193, 858)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1301,10 +1477,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>blocks_tag_debug</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0</value>
+      <value>blocks_tag_debug_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1312,83 +1488,90 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>byte</value>
     </param>
     <param>
-      <key>title</key>
-      <value>FFT Plot</value>
+      <key>name</key>
+      <value>Rx'd Packets</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
+      <key>filter</key>
+      <value>""</value>
     </param>
     <param>
-      <key>baseband_freq</key>
-      <value>0</value>
+      <key>num_inputs</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_per_div</key>
-      <value>10</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>y_divs</key>
-      <value>10</value>
+      <key>display</key>
+      <value>True</value>
     </param>
     <param>
-      <key>ref_level</key>
-      <value>0</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>ref_scale</key>
-      <value>2.0</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>_coordinate</key>
+      <value>(689, 889)</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>15</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>blocks_throttle</key>
     <param>
-      <key>peak_hold</key>
-      <value>False</value>
+      <key>id</key>
+      <value>blocks_throttle_0</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>win</key>
-      <value>None</value>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>win_size</key>
-      <value></value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>grid_pos</key>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>notebook</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>freqvar</key>
-      <value>None</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(994, 810)</value>
+      <value>(559, 747)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1396,125 +1579,238 @@
     </param>
   </block>
   <block>
-    <key>digital_ofdm_rx</key>
+    <key>qtgui_freq_sink_x</key>
     <param>
       <key>id</key>
-      <value>digital_ofdm_rx_0</value>
+      <value>qtgui_freq_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>fft_len</key>
-      <value>fft_len</value>
+      <key>type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>cp_len</key>
-      <value>fft_len/4</value>
+      <key>name</key>
+      <value>FFT Plot</value>
     </param>
     <param>
-      <key>packet_len_key</key>
-      <value>"length"</value>
+      <key>fftsize</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>occupied_carriers</key>
-      <value>occupied_carriers</value>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
     </param>
     <param>
-      <key>pilot_carriers</key>
-      <value>pilot_carriers</value>
+      <key>fc</key>
+      <value>0</value>
     </param>
     <param>
-      <key>pilot_symbols</key>
-      <value>pilot_symbols</value>
+      <key>bw</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>sync_word1</key>
-      <value>sync_word1</value>
+      <key>autoscale</key>
+      <value>True</value>
     </param>
     <param>
-      <key>sync_word2</key>
-      <value>sync_word2</value>
+      <key>average</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>header_mod</key>
-      <value>"BPSK"</value>
+      <key>ymin</key>
+      <value>-140</value>
     </param>
     <param>
-      <key>payload_mod</key>
-      <value>"QPSK"</value>
+      <key>ymax</key>
+      <value>10</value>
     </param>
     <param>
-      <key>scramble_bits</key>
-      <value>False</value>
+      <key>nconnections</key>
+      <value>1</value>
     </param>
     <param>
-      <key>log</key>
-      <value>False</value>
+      <key>update_time</key>
+      <value>0.10</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>gui_hint</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
-      <value>0</value>
+      <key>label1</key>
+      <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(439, 823)</value>
+      <key>width1</key>
+      <value>1</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>color1</key>
+      <value>"blue"</value>
     </param>
-  </block>
-  <block>
-    <key>channels_channel_model</key>
     <param>
-      <key>id</key>
-      <value>channels_channel_model_0</value>
+      <key>alpha1</key>
+      <value>1.0</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>True</value>
+      <key>label2</key>
+      <value></value>
     </param>
     <param>
-      <key>noise_voltage</key>
-      <value>0.0</value>
+      <key>width2</key>
+      <value>1</value>
     </param>
     <param>
-      <key>freq_offset</key>
-      <value>0.0</value>
+      <key>color2</key>
+      <value>"red"</value>
     </param>
     <param>
-      <key>epsilon</key>
+      <key>alpha2</key>
       <value>1.0</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>1.0 + 1.0j</value>
+      <key>label3</key>
+      <value></value>
     </param>
     <param>
-      <key>seed</key>
-      <value>0</value>
+      <key>width3</key>
+      <value>1</value>
     </param>
     <param>
-      <key>block_tags</key>
-      <value>True</value>
+      <key>color3</key>
+      <value>"green"</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
-      <value>0</value>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"dark blue"</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(193, 858)</value>
+      <value>(966, 841)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1522,10 +1818,10 @@
     </param>
   </block>
   <block>
-    <key>blocks_tag_debug</key>
+    <key>qtgui_time_sink_x</key>
     <param>
       <key>id</key>
-      <value>blocks_tag_debug_0</value>
+      <value>qtgui_time_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1533,31 +1829,323 @@
     </param>
     <param>
       <key>type</key>
-      <value>byte</value>
+      <value>complex</value>
     </param>
     <param>
       <key>name</key>
-      <value>Rx'd Packets</value>
+      <value>Scope Plot</value>
     </param>
     <param>
-      <key>num_inputs</key>
+      <key>size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>srate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>autoscale</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>ymin</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>ymax</key>
       <value>1</value>
     </param>
     <param>
-      <key>vlen</key>
+      <key>nconnections</key>
       <value>1</value>
     </param>
     <param>
-      <key>display</key>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>entags</key>
       <value>True</value>
     </param>
     <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>tr_mode</key>
+      <value>qtgui.TRIG_MODE_FREE</value>
+    </param>
+    <param>
+      <key>tr_slope</key>
+      <value>qtgui.TRIG_SLOPE_POS</value>
+    </param>
+    <param>
+      <key>tr_level</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>tr_delay</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_chan</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>tr_tag</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value>Scope Plot</value>
+    </param>
+    <param>
+      <key>width1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker1</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha1</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>"red"</value>
+    </param>
+    <param>
+      <key>style2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker2</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha2</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>"green"</value>
+    </param>
+    <param>
+      <key>style3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker3</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha3</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>"black"</value>
+    </param>
+    <param>
+      <key>style4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker4</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha4</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>"cyan"</value>
+    </param>
+    <param>
+      <key>style5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker5</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha5</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>"magenta"</value>
+    </param>
+    <param>
+      <key>style6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker6</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha6</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>"yellow"</value>
+    </param>
+    <param>
+      <key>style7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker7</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha7</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>"dark red"</value>
+    </param>
+    <param>
+      <key>style8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker8</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha8</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>"dark green"</value>
+    </param>
+    <param>
+      <key>style9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker9</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha9</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>width10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>"blue"</value>
+    </param>
+    <param>
+      <key>style10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>marker10</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>alpha10</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>affinity</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(689, 889)</value>
+      <value>(962, 714)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1565,38 +2153,62 @@
     </param>
   </block>
   <block>
-    <key>blocks_throttle</key>
+    <key>options</key>
     <param>
       <key>id</key>
-      <value>blocks_throttle_0</value>
+      <value>tx_ofdm</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
+      <key>title</key>
+      <value>OFDM Tx</value>
     </param>
     <param>
-      <key>samples_per_second</key>
-      <value>samp_rate</value>
+      <key>author</key>
+      <value></value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>description</key>
+      <value>Example of an OFDM Transmitter</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>window_size</key>
+      <value>1280, 1024</value>
     </param>
     <param>
-      <key>minoutbuf</key>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>run</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
       <value>0</value>
     </param>
     <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(559, 747)</value>
+      <value>(1, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1682,18 +2294,6 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>blocks_throttle_0</source_block_id>
-    <sink_block_id>wxgui_scopesink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>blocks_throttle_0</source_block_id>
-    <sink_block_id>wxgui_fftsink2_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>blocks_stream_to_tagged_stream_0</source_block_id>
     <sink_block_id>digital_crc32_bb_0</sink_block_id>
     <source_key>0</source_key>
@@ -1747,4 +2347,16 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>qtgui_freq_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
 </flow_graph>