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From: fisher@star.dec.com (Burns Fisher ZKO1-1/D42 DTN 381-1466)
Newsgroups: comp.sys.atari.8bit
Subject: 800XL chroma
Message-ID: <7474@decwrl.DEC.COM>
Date: Sun, 11-Jan-87 21:31:07 EST
Article-I.D.: decwrl.7474
Posted: Sun Jan 11 21:31:07 1987
Date-Received: Mon, 12-Jan-87 03:39:13 EST
Sender: daemon@decwrl.DEC.COM
Organization: Digital Equipment Corporation
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Followup:  I followed the instructions of several respondants and got a chroma
signal from the junction of R68 and R67 and took it to pin 5 through 200 ohms.

I ran the existing lumma signal to the lumma input of my Commodore 1702 monitor
and the new chroma signal to the chroma input.  Yes, it does work fine.
However, I have to say I can't tell the difference between using the new
chroma signal composite video into the chroma input.  Both seem equally
good.  I guess I can see now why Atari did not bother with the separate chroma
when the designed the XL.

Notice that I am talking about running composite to chroma input. If I
run composite into the composite input, the picture quality is distinctly
inferior.

Just curious...has anyone else (perhaps someone with an 800 non-XL) tried
substituting composite for chroma?  Can you see the difference?

Thanks for all your help.

Burns

fisher%star@DEC.COM