Path: 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: Date: 24 Jun 91 01:13:03 GMT Organization: The Duck Pond, Stockton, CA Lines: 22 (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. -- Nick Sayer | Official Scapegoat for the | "And now my mrapple@quack.sac.ca.us | MC68HC11 Mailing List. | post is done!" N6QQQ | To subscribe, send mail to | --buster@acme.edu 209-952-5347 (Telebit) | mc68hc11-request@quack.sac.ca.us |