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From: reichert@motcid.UUCP (Chuck KD9JQ)
Newsgroups: sci.electronics
Subject: Re: SCA Tuner
Message-ID: <4743@cocoa46.UUCP>
Date: 15 Apr 91 20:52:44 GMT
Distribution: sci
Organization: Motorola Inc., Cellular Infrastructure Div., Arlington Heights, IL
Lines: 7


	The 38Khz L-R info is part of the 0-15Khz L+R Audio info.  19Khz 10%
Pilot is doubled to 38Khz and suppressed (DSB).  The 67Khz is all by itself and
usually some sort of PLL detection is required.  Use of a stereo decoder chip
LM-1800, 2800, etc.) with the de-emphasis removed and the output fed to the PLL (CD 4046, etc) decoder has worked in the past. 

		Chuck Reichert    KD9JQ