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From: ken@turtlevax.UUCP (Ken Turkowski)
Newsgroups: net.graphics,net.video
Subject: Re: RGB to composite output ?
Message-ID: <806@turtlevax.UUCP>
Date: Mon, 1-Jul-85 13:04:57 EDT
Article-I.D.: turtleva.806
Posted: Mon Jul  1 13:04:57 1985
Date-Received: Thu, 4-Jul-85 00:27:57 EDT
References: <6105@ucla-cs.ARPA>
Reply-To: ken@turtlevax.UUCP (Ken Turkowski)
Distribution: net
Organization: CADLINC, Inc. @ Menlo Park, CA
Lines: 27
Xref: watmath net.graphics:852 net.video:1280

In article <6105@ucla-cs.ARPA> roth@ucla-cs.UUCP (coupe d`ville) writes:
>How can I take the output (loopthrough) of an RGB monitor and
>record it on a VCR? Is there a "black box" available that will
>convert RGB to composite so that I can use a standard VCR or
>do I need a special VCR? All information /recommendations 
>appreciated.
>
>Specifics: monitor is a Hitachi HM-3619A 19" color
>           with 1280 x 1024 resolution 
>           claimed bandwidth 45khtz
>           RGB in and out via BNC plugs

Yes, there are boxes that convert RGB to NSTC.  They are called
"encoders".  Check your local video store.  If they don't have them,
they can guide you to a place that does have them.  One manufacturer
of encoders that I know of is Cohu, located, I believe, in San Diego.

However, what kind of video do you have?  Monitor specs are
irrelevant.  It should be 525 lines (486 visible), vertical frequency
60 Hz interlaced, horizontal frequency 15750 Hz, and a video bandwidth
of 4.2 MHz.  If not, get yourself a framestore that can generate
NTSC-compatible video.  Those with 480x640 resolution are a good bet.
-- 

Ken Turkowski @ CADLINC, Menlo Park, CA
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