WFM Squelch

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pijimh
Posts: 2
Joined: Tue Apr 23, 2019 2:25 am

WFM Squelch

Post by pijimh » Tue Apr 23, 2019 2:38 am

The Squelch selection is grayed out when WFM s selected, SDR# v1.0.0.1700 - RTL-SDR(USB)
Why is that?

Thanks, Jim

pijimh
Posts: 2
Joined: Tue Apr 23, 2019 2:25 am

Re: WFM Squelch

Post by pijimh » Tue Apr 23, 2019 4:11 am

Which leads to the question: In the radio world, why don't we often see squelches on modes other than FM?

Thanks ,Jim

hotpaw2
Posts: 114
Joined: Sat Jan 14, 2017 11:07 pm
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Re: WFM Squelch

Post by hotpaw2 » Tue Apr 23, 2019 4:12 pm

The signal bandwidth and subcarriers (for stereo, data, etc.) in WFM broadcasts interfere with the typical capture algorithms/filters used for NFM squelch. Those same capture algorithms work extremely poorly for AM.

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