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From: | Marcus D. Leech |
Subject: | Re: FM stereo receiver distortion |
Date: | Fri, 19 Jun 2020 21:39:12 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 06/19/2020 08:29 PM, Barry Duggan wrote:
Hi James and others,Success! Using the code from https://github.com/gnuradio/gnuradio/blob/master/gr-analog/python/analog/wfm_rcv_fmdet.py with several modifications, I built a FM stereo receiver using only basic blocks. See the revised https://wiki.gnuradio.org/index.php/File:USRP_FM_stereo_fg.pngThank you for everyone's help / suggestions. --- Barry Duggan KV4FV
You know, I had forgotten that I did this, several years back: https://github.com/patchvonbraun/wfm_stuff
On 2020-06-17 01:11, James Hayek wrote:Evening Barry, I'll put this on my to do list tomorrow morning for the Pluto. On Tue, Jun 16, 2020 at 8:45 PM Barry Duggan <barry@dcsmail.net> wrote:Hi, I have a broadcast FM (mono) receiver which works well, with good audio and clean traces in the Time Domain. See https://wiki.gnuradio.org/index.php/File:USRP_FM_fg.png Then I made a stereo version. See https://wiki.gnuradio.org/index.php/File:USRP_FM_stereo_fg.png Using it, the sound has a distortion but does not have any audio underruns. The traces in the Time Domain have a lot of "fuzz" (noise?). Do I need a filter? If so, would it come before or after the WBFM Receive PLL block? Once I have a good design, I will use it as an Example Flowgraph. Thanks for your help. -- Barry Duggan KV4FV-- Thanks, James G Hayek Youtube.com/JamesHayek
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