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Article #14415

MTS method ?

#14415
From: Nick Sayer
Date: Mon, 24 Jun 1991 01:13
22 lines
1584 bytes
(Yes, I'm full of questions lately)

Let's say I want to build a cable ready, Stereo/MTS television demodulator
(i.e. the VCR without the VCR that we've all been talking about lately).
Fine. I need to build a frequency generator to generate a frequency
suitable to mix with the RF to get to the first IF of 45 MHz. From
there, Motorola makes a pair of chips to do IF amplification and TV
decoding. Fine. The FM subcarrier would, theoretically, be available
at 50.75 MHz (or so). Fine again. Now the MTS part. How does MTS work?
Is it similar to FM broadcast stereo ( DSB no carrier L-R at x kHz and
pilot at x/2 kHz ) ? I don't think so or at least if so, x is not
38 kHz, since channel six here has stereo+SAP, but doesn't register
on my stereo (which tunes that low). So how does it work, and does
anyone have any chips to do this? Has Radio Electronics done this yet?
I'd think the demand would be large enough for them to take a crack
at it.

-- 
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!lll-winken!quack!mrapple
From: mrapple@quack.sac.ca.us (Nick Sayer)
Newsgroups: sci.electronics
Subject: MTS method ?
Message-ID: <kXAYtXS@quack.sac.ca.us>
Date: 24 Jun 91 01:13:03 GMT
Organization: The Duck Pond, Stockton, CA
Lines: 22