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From: szeto@kilroy.jpl.nasa.gov (James T. Szeto)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: FM SCA Subcarrier Demodulation
Message-ID: <1991Apr19.050618.23977@elroy.jpl.nasa.gov>
Date: 19 Apr 91 05:06:18 GMT
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Organization: Jet Propulsion Laboratory, Pasadena, CA
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Originator: szeto@kilroy
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After reading the FCC Rules and Regulations concerning the engineering standard
for subsidiary communications (SCA), I was wondering if someone would give a 
clearer understanding on how SCA is added to the FM signal and how it is 
recovered from the signal.  Also, I'm looking for a reference where I may find
an example circuit which recovers SCA.

Thanx in advance.
 
James T. Szeto                          | Internet: szeto@kilroy.jpl.nasa.gov
Jet Propulsion Laboratory               | Phone   : (818) 354-2299
Atmospheric and Oceanographic Sciences  | Fax     : (818) 354-5148
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Pasadena, CA  91109                     |