Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!oliveb!tymix!tardis!jms
From: jms@tardis.Tymnet.COM (Joe Smith)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Want to use A3000 Display Enhancer and CMI VI-500 RF Modulator
Summary: Can't be done
Message-ID: <1157@tardis.Tymnet.COM>
Date: 19 Jul 90 02:07:15 GMT
References: <1071@orange9.qtp.ufl.edu>
Reply-To: jms@tardis.Tymnet.COM (Joe Smith)
Distribution: na
Organization: BT Tymnet, San Jose, CA
Lines: 34

In article <1071@orange9.qtp.ufl.edu> sutherla@qtp.ufl.edu (Scott Sutherland) writes:
>I know that the A3000 has a 23 pin connector to which I could hook
>my encoder AND I also have 2 connectors which came with my A3000
>which will convert from the connector for the 31 KHz out to a 
>23 pin connector.

No, you have an adapter that allows the 15-pin VGA cable from the A1950
monitor to plug into the 23-pin connector.  The adaptor does not create
at 31 KHz signal - it buffers and passes the 15 KHz signal to the monitor,
which is capable of displaying an image at that low frequency.

>One, does the display enhancer affect the data output on the standard
>15.?? KHz 23-pin connector on the A3000?

No, it does not.

>If not, is there ANY reason why I cannot use the 31 KHz to 23-pin converter
>to hook up my encoder to the 31 KHz out so that I can dump these 
>display-enhanced images to video tape??

The adapter only passes signals from the 23-pin end to the 15-pin end.
It can't be used backwards.

>Are the images processed with the display enhancer NOT NTSC compatible???

You got it.  NTSC runs at a horizontal frequency of 15.750 KHz and a frame
rate of 30 Hz.  The display enhancer puts out a signal running at 31.500 KHz
and a frame rate of 60 Hz.  That is very definately out-of-spec for any
NTSC compliant device, such as your CMI Encoder, your VCR, or your TV.
-- 
Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com
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