Re: FM stereo receiver distortion

Is the .grc file available anywhere?

Ron

On 6/19/20 17:29, 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.png
>
> Thank you for everyone's help / suggestions.
> ---
> Barry Duggan KV4FV
>
>
> 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
>