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From: rbowman <bowman@montana.com>
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Subject: Re: Real-time OSs (Re: Microsoft Is Abandoning Windows 11 SE)
Date: 17 Aug 2025 21:29:18 GMT
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On Sun, 17 Aug 2025 21:02:22 +0100, The Natural Philosopher wrote:

> "To allow room for more stations on the medium wave broadcast band in
> the United States, in June 1989 the FCC adopted a National Radio Systems
> Committee (NRSC) standard that limited maximum transmitted *audio*
> bandwidth to 10.2 kHz, limiting *occupied* bandwidth to 20.4 kHz. The
> former audio limitation was 15 kHz resulting in bandwidth of 30 kHz."
> 
> So channel spacing in the USA is in fact 20Khz

In practice the wings from the center frequency are down so many db they 
do not matter unless you're in front of a spectrum analyzer.