<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
<timestamp>Fri Aug 2 16:57:39 2013</timestamp>
<block>
<key>options</key>
<param>
<key>id</key>
<value>demo_quantization</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>title</key>
<value></value>
</param>
<param>
<key>author</key>
<value>mettus</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>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>_coordinate</key>
<value>(10, 10)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>samp_rate</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>100000</value>
</param>
<param>
<key>_coordinate</key>
<value>(11, 134)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>import</key>
<param>
<key>id</key>
<value>import_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>import</key>
<value>import math</value>
</param>
<param>
<key>_coordinate</key>
<value>(11, 88)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_range</key>
<param>
<key>id</key>
<value>bw</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>BW</value>
</param>
<param>
<key>value</key>
<value>samp_rate/2</value>
</param>
<param>
<key>start</key>
<value>samp_rate/100</value>
</param>
<param>
<key>stop</key>
<value>samp_rate/2</value>
</param>
<param>
<key>step</key>
<value>100</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>_coordinate</key>
<value>(873, 11)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_range</key>
<param>
<key>id</key>
<value>center</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Center Freq.</value>
</param>
<param>
<key>value</key>
<value>samp_rate/11.0</value>
</param>
<param>
<key>start</key>
<value>0</value>
</param>
<param>
<key>stop</key>
<value>samp_rate/2</value>
</param>
<param>
<key>step</key>
<value>100</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>2,1,1,1</value>
</param>
<param>
<key>_coordinate</key>
<value>(724, 11)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_chooser</key>
<param>
<key>id</key>
<value>bits</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Bits</value>
</param>
<param>
<key>type</key>
<value>int</value>
</param>
<param>
<key>num_opts</key>
<value>0</value>
</param>
<param>
<key>value</key>
<value>16</value>
</param>
<param>
<key>options</key>
<value>[0, 1, 2, 4, 6, 8, 10, 12, 14, 16]</value>
</param>
<param>
<key>labels</key>
<value>[]</value>
</param>
<param>
<key>option0</key>
<value>0</value>
</param>
<param>
<key>label0</key>
<value></value>
</param>
<param>
<key>option1</key>
<value>1</value>
</param>
<param>
<key>label1</key>
<value></value>
</param>
<param>
<key>option2</key>
<value>2</value>
</param>
<param>
<key>label2</key>
<value></value>
</param>
<param>
<key>option3</key>
<value>3</value>
</param>
<param>
<key>label3</key>
<value></value>
</param>
<param>
<key>option4</key>
<value>4</value>
</param>
<param>
<key>label4</key>
<value></value>
</param>
<param>
<key>widget</key>
<value>combo_box</value>
</param>
<param>
<key>orient</key>
<value>Qt.QVBoxLayout</value>
</param>
<param>
<key>gui_hint</key>
<value>1,2,1,1</value>
</param>
<param>
<key>_coordinate</key>
<value>(570, 10)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_range</key>
<param>
<key>id</key>
<value>sigfreq</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Signal Freq</value>
</param>
<param>
<key>value</key>
<value>samp_rate*1.0247385/11.0</value>
</param>
<param>
<key>start</key>
<value>0</value>
</param>
<param>
<key>stop</key>
<value>samp_rate/2</value>
</param>
<param>
<key>step</key>
<value>100</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>1,1,1,1</value>
</param>
<param>
<key>_coordinate</key>
<value>(427, 9)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_range</key>
<param>
<key>id</key>
<value>signal_amp</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Signal Power</value>
</param>
<param>
<key>value</key>
<value>-150</value>
</param>
<param>
<key>start</key>
<value>-150</value>
</param>
<param>
<key>stop</key>
<value>0</value>
</param>
<param>
<key>step</key>
<value>1</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>0,2,1,1</value>
</param>
<param>
<key>_coordinate</key>
<value>(301, 9)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_qtgui_range</key>
<param>
<key>id</key>
<value>noise_amp</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Noise Power</value>
</param>
<param>
<key>value</key>
<value>-150</value>
</param>
<param>
<key>start</key>
<value>-150</value>
</param>
<param>
<key>stop</key>
<value>0</value>
</param>
<param>
<key>step</key>
<value>1</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>0,1,1,1</value>
</param>
<param>
<key>_coordinate</key>
<value>(173, 10)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>blocks_add_xx</key>
<param>
<key>id</key>
<value>blocks_add_xx_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>float</value>
</param>
<param>
<key>num_inputs</key>
<value>2</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(489, 297)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>channels_quantizer</key>
<param>
<key>id</key>
<value>channels_quantizer_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>bits</key>
<value>bits</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(827, 203)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>blocks_multiply_const_vxx</key>
<param>
<key>id</key>
<value>blocks_multiply_const_vxx_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>float</value>
</param>
<param>
<key>const</key>
<value>pow(2,bits-1)</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(800, 287)</value>
</param>
<param>
<key>_rotation</key>
<value>0</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>float</value>
</param>
<param>
<key>name</key>
<value></value>
</param>
<param>
<key>fftsize</key>
<value>2048</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>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>3,1,1,2</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(998, 170)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>analog_sig_source_x</key>
<param>
<key>id</key>
<value>analog_sig_source_x_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>float</value>
</param>
<param>
<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>sigfreq</value>
</param>
<param>
<key>amp</key>
<value>pow(10.0,signal_amp/20.0)</value>
</param>
<param>
<key>offset</key>
<value>0</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(7, 295)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>band_pass_filter</key>
<param>
<key>id</key>
<value>band_pass_filter_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>fir_filter_fff</value>
</param>
<param>
<key>decim</key>
<value>1</value>
</param>
<param>
<key>interp</key>
<value>1</value>
</param>
<param>
<key>gain</key>
<value>1</value>
</param>
<param>
<key>samp_rate</key>
<value>samp_rate</value>
</param>
<param>
<key>low_cutoff_freq</key>
<value>max(bw/15.0,center-bw/2.0)</value>
</param>
<param>
<key>high_cutoff_freq</key>
<value>min(samp_rate/2.0-bw/15.0,center+bw/2.0)</value>
</param>
<param>
<key>width</key>
<value>bw/5.0</value>
</param>
<param>
<key>win</key>
<value>firdes.WIN_HANN</value>
</param>
<param>
<key>beta</key>
<value>6.76</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(212, 173)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>analog_noise_source_x</key>
<param>
<key>id</key>
<value>analog_noise_source_x_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>float</value>
</param>
<param>
<key>noise_type</key>
<value>analog.GR_GAUSSIAN</value>
</param>
<param>
<key>amp</key>
<value>pow(10.0,noise_amp/20.0)</value>
</param>
<param>
<key>seed</key>
<value>42</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(9, 213)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>blocks_throttle</key>
<param>
<key>id</key>
<value>blocks_throttle_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>float</value>
</param>
<param>
<key>samples_per_second</key>
<value>samp_rate</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(634, 203)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>qtgui_histogram_sink_x</key>
<param>
<key>id</key>
<value>qtgui_histogram_sink_x_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>name</key>
<value></value>
</param>
<param>
<key>size</key>
<value>10240</value>
</param>
<param>
<key>bins</key>
<value>1000</value>
</param>
<param>
<key>xmin</key>
<value>-10000</value>
</param>
<param>
<key>xmax</key>
<value>10000</value>
</param>
<param>
<key>nconnections</key>
<value>1</value>
</param>
<param>
<key>update_time</key>
<value>0.1</value>
</param>
<param>
<key>gui_hint</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(998, 271)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<connection>
<source_block_id>blocks_throttle_0</source_block_id>
<sink_block_id>channels_quantizer_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>channels_quantizer_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>band_pass_filter_0</source_block_id>
<sink_block_id>blocks_add_xx_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>blocks_add_xx_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_quantizer_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>qtgui_histogram_sink_x_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>analog_sig_source_x_0</source_block_id>
<sink_block_id>blocks_add_xx_0</sink_block_id>
<source_key>0</source_key>
<sink_key>1</sink_key>
</connection>
<connection>
<source_block_id>analog_noise_source_x_0</source_block_id>
<sink_block_id>band_pass_filter_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
</flow_graph>