From e8ffc004bc0fd1cec66629d1c92af8f68fde3249 Mon Sep 17 00:00:00 2001
From: cswiger <cswiger@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Tue, 13 May 2008 20:32:56 +0000
Subject: Added interp_fir_filter in place of zero sources, interleaver, filter
scheme.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@8417 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-atsc/src/python/interp_short.py | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
(limited to 'gr-atsc/src/python/interp_short.py')
diff --git a/gr-atsc/src/python/interp_short.py b/gr-atsc/src/python/interp_short.py
index 33172dae3e..d6b2ca1237 100755
--- a/gr-atsc/src/python/interp_short.py
+++ b/gr-atsc/src/python/interp_short.py
@@ -27,7 +27,7 @@
# -f <center of tv signal channel freq>
# -g <appropriate gain for best signal / noise>
# -s output shorts
-@
+#
# All this module does is multiply the sample rate by 3, from 6.4e6 to
# 19.2e6 complex samples / sec, then lowpass filter with a cutoff of 3.2MHz
# and a transition band width of .5MHz. Center of the tv channels is
@@ -45,8 +45,6 @@ def graph (args):
sys.stderr.write('usage: interp.py input_file\n')
sys.exit (1)
- sampling_freq = 6400000
-
tb = tb.top_block ()
srcf = gr.file_source (gr.sizeof_short,infile)
@@ -55,13 +53,9 @@ def graph (args):
s2f2 = gr.short_to_float()
src0 = gr.float_to_complex()
- src1 = gr.sig_source_c (sampling_freq, gr.GR_CONST_WAVE, 1, 0)
- src2 = gr.sig_source_c (sampling_freq, gr.GR_CONST_WAVE, 1, 0)
-
- interlv = gr.interleave(gr.sizeof_gr_complex)
lp_coeffs = gr.firdes.low_pass ( 3, 19.2e6, 3.2e6, .5e6, gr.firdes.WIN_HAMMING )
- lp = gr.fir_filter_ccf ( 1, lp_coeffs )
+ lp = gr.interp_fir_filter_ccf ( 3, lp_coeffs )
file = gr.file_sink(gr.sizeof_gr_complex,"/tmp/atsc_pipe_1")
@@ -70,9 +64,7 @@ def graph (args):
tb.connect( (s2ss, 1), s2f2)
tb.connect( s2f1, (src0,0) )
tb.connect( s2f2, (src0,1) )
- tb.connect( src0, (interlv, 0) )
- tb.connect( src1, (interlv, 1) )
- tb.connect( src2, (interlv, 2) )
+ tb.connect( src0, lp, file)
tb.connect( interlv, lp, file )
tb.start()
--
cgit v1.2.3