Hi,
I have been trying to get my Pluto to work with WBFM, but I am not
having any luck. I am attaching a grc file that I am pretty sure should
work, but it does not. It just generates sporadic noise. I did the
changes recommended to get the Pluto to work over a wider frequency
range, and the results indicated that the changes worked. And, I have
tried using the Pluto at higher frequencies to detect a WBFM signal, and
it still does not work properly. So, I know it has to be something with
my grc file.
What am I doing wrong?
Ed
<?xml version='1.0' encoding='utf-8'?>
<?grc format='1' created='3.7.12'?>
<flow_graph>
<timestamp>Thu Nov 20 18:01:12 2014</timestamp>
<block>
<key>options</key>
<param>
<key>author</key>
<value></value>
</param>
<param>
<key>window_size</key>
<value>1280, 1024</value>
</param>
<param>
<key>category</key>
<value>Custom</value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>description</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(12, 8)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>generate_options</key>
<value>wx_gui</value>
</param>
<param>
<key>hier_block_src_path</key>
<value>.:</value>
</param>
<param>
<key>id</key>
<value>top_block</value>
</param>
<param>
<key>max_nouts</key>
<value>0</value>
</param>
<param>
<key>qt_qss_theme</key>
<value></value>
</param>
<param>
<key>realtime_scheduling</key>
<value>1</value>
</param>
<param>
<key>run_command</key>
<value>{python} -u {filename}</value>
</param>
<param>
<key>run_options</key>
<value>prompt</value>
</param>
<param>
<key>run</key>
<value>True</value>
</param>
<param>
<key>sizing_mode</key>
<value>fixed</value>
</param>
<param>
<key>thread_safe_setters</key>
<value></value>
</param>
<param>
<key>title</key>
<value>FM Receiver</value>
</param>
<param>
<key>placement</key>
<value>(0,0)</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(186, 13)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>freq</value>
</param>
<param>
<key>value</key>
<value>92500000</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(17, 114)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>samp_rate</value>
</param>
<param>
<key>value</key>
<value>5000000</value>
</param>
</block>
<block>
<key>analog_wfm_rcv</key>
<param>
<key>audio_decimation</key>
<value>1</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(437, 328)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>analog_wfm_rcv_0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>quad_rate</key>
<value>250000</value>
</param>
</block>
<block>
<key>audio_sink</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>device_name</key>
<value></value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>_coordinate</key>
<value>(661, 146)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>audio_sink_0</value>
</param>
<param>
<key>num_inputs</key>
<value>1</value>
</param>
<param>
<key>ok_to_block</key>
<value>True</value>
</param>
<param>
<key>samp_rate</key>
<value>96000</value>
</param>
</block>
<block>
<key>low_pass_filter</key>
<param>
<key>beta</key>
<value>6.76</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>cutoff_freq</key>
<value>100000</value>
</param>
<param>
<key>decim</key>
<value>20</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>fir_filter_ccf</value>
</param>
<param>
<key>_coordinate</key>
<value>(245, 296)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>gain</key>
<value>1</value>
</param>
<param>
<key>id</key>
<value>low_pass_filter_0</value>
</param>
<param>
<key>interp</key>
<value>1</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>samp_rate</key>
<value>samp_rate</value>
</param>
<param>
<key>width</key>
<value>10000</value>
</param>
<param>
<key>win</key>
<value>firdes.WIN_HAMMING</value>
</param>
</block>
<block>
<key>pluto_source</key>
<param>
<key>bbdc</key>
<value>True</value>
</param>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>buffer_size</key>
<value>0x8000</value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>decimation</key>
<value>1</value>
</param>
<param>
<key>uri</key>
<value>192.168.2.1</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>auto_filter</key>
<value>True</value>
</param>
<param>
<key>filter</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(48, 266)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>gain</key>
<value>"manual"</value>
</param>
<param>
<key>id</key>
<value>pluto_source_0</value>
</param>
<param>
<key>frequency</key>
<value>freq</value>
</param>
<param>
<key>manual_gain</key>
<value>64.0</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>quadrature</key>
<value>True</value>
</param>
<param>
<key>rfdc</key>
<value>True</value>
</param>
<param>
<key>bandwidth</key>
<value>500000</value>
</param>
<param>
<key>samplerate</key>
<value>samp_rate</value>
</param>
</block>
<block>
<key>rational_resampler_xxx</key>
<param>
<key>alias</key>
<value></value>
</param>
<param>
<key>comment</key>
<value></value>
</param>
<param>
<key>affinity</key>
<value></value>
</param>
<param>
<key>decim</key>
<value>250</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>fbw</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(629, 312)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
<param>
<key>id</key>
<value>rational_resampler_xxx_0</value>
</param>
<param>
<key>interp</key>
<value>96</value>
</param>
<param>
<key>maxoutbuf</key>
<value>0</value>
</param>
<param>
<key>minoutbuf</key>
<value>0</value>
</param>
<param>
<key>taps</key>
<value></value>
</param>
<param>
<key>type</key>
<value>fff</value>
</param>
</block>
<connection>
<source_block_id>analog_wfm_rcv_0</source_block_id>
<sink_block_id>rational_resampler_xxx_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>low_pass_filter_0</source_block_id>
<sink_block_id>analog_wfm_rcv_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>pluto_source_0</source_block_id>
<sink_block_id>low_pass_filter_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>rational_resampler_xxx_0</source_block_id>
<sink_block_id>audio_sink_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
</flow_graph>
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