diff options
Diffstat (limited to 'docs/exploring-gnuradio/fm_demod.py')
| -rwxr-xr-x | docs/exploring-gnuradio/fm_demod.py | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/docs/exploring-gnuradio/fm_demod.py b/docs/exploring-gnuradio/fm_demod.py index e58407f73..0071fd751 100755 --- a/docs/exploring-gnuradio/fm_demod.py +++ b/docs/exploring-gnuradio/fm_demod.py @@ -21,10 +21,10 @@ def build_graph (freq1, freq2): audio_rate = quad_rate / audio_decimation fg = gr.flow_graph () - + # use high speed ADC as input source src = high_speed_adc (fg, input_rate) - + # compute FIR filter taps for channel selection channel_coeffs = \ gr.firdes.low_pass (1.0, # gain @@ -39,9 +39,9 @@ def build_graph (freq1, freq2): channel_coeffs, freq1, # 1st station freq input_rate) - + (head1, tail1) = build_pipeline (fg, quad_rate, audio_decimation) - + # sound card as final sink audio_sink = audio.sink (int (audio_rate)) @@ -67,7 +67,7 @@ def build_graph (freq1, freq2): fg.connect (src, chan_filter2) fg.connect (chan_filter2, head2) fg.connect (tail2, (audio_sink, 1)) - + return fg def build_pipeline (fg, quad_rate, audio_decimation): @@ -99,7 +99,7 @@ def build_pipeline (fg, quad_rate, audio_decimation): fg.connect (fm_demod, audio_filter) return ((fm_demod, 0), (audio_filter, 0)) - + def main (args): nargs = len (args) @@ -136,10 +136,10 @@ def main (args): target_freq = (freq1 + freq2) / 2 actual_freq = rf_front_end.set_RF_freq (target_freq) #actual_freq = target_freq - + fg = build_graph (IF_freq + freq1 - actual_freq, IF_freq + freq2 - actual_freq) - + fg.start () # fork thread(s) and return raw_input ('Press Enter to quit: ') fg.stop () |