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From: jhs@disunix.UUCP
Newsgroups: net.micro.atari16
Subject: Re: Video out on 520 and 1040ST
Message-ID: <8606232127.AA21999@mitre-bedford.ARPA>
Date: Mon, 23-Jun-86 17:27:45 EDT
Article-I.D.: mitre-be.8606232127.AA21999
Posted: Mon Jun 23 17:27:45 1986
Date-Received: Wed, 25-Jun-86 05:48:24 EDT
References: <360@atari.UUcp>
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Organization: The MITRE Corp., Bedford, MA
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If you have a 520 with RF modulator output, you should be able to add a
composite output fairly easily, as the baseband input to the RF modulator is
precisely the composite signal.  All you have to do is bring it out, possibly
with an amplifier stage if the level is not right.  More likely just a switch
or a parallel tap off the input to the modulator will work fine.

I haven't seen the schematic, but you may also pick up some resolution on the
composite output by removing a "slowdown" capacitor put in to keep the TV
modulator bandwidth down.  Or, you might be able to leave such a capacitor in
place and pick off your signal before the slowdown circuit has affected it.

Good luck.

-John Sangster
jhs@mitre-bedford.arpa