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From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
Newsgroups: comp.sys.dec
Subject: Re: VAXstation 2000, monitor cable
Message-ID: <1991Jun1.033527.1411@spcvxb.spc.edu>
Date: 1 Jun 91 03:35:27 GMT
References: <1991May31.121457.13500@odin.diku.dk> <1991May31.152314.9216@e2big.mko.dec.com>
Organization: St. Peter's College, US
Lines: 21

In article <1991May31.152314.9216@e2big.mko.dec.com>, marra@samuel.enet.dec.com (Dave Marra) writes:
> 
> From a former team member for the vs2000 team:
> "The video driver in the VS2000 is a ttl signal. THe video quality will
> go down the tube after 10 Ft."

  Well, if the 2000 uses a composite video signal (and if it uses the VR260
monitor, it does) you can use standard video technology to distribute it.
Over 5 years ago we were doing this on the then-high end video subsystems
(2048x2048x24) using standard TV studio type components. A common part was
the Apert VBB (Video Bus Buffer) which was designed to drive a few thousand
feet of coax with maybe 60 taps on it at broadcast quality. These devices
certainly handled the bandwidth of the signals we were generating. You've
seen the graphics that we did with them on TV, as well.

  In other words, you can always re-generate and re-drive the signal if
you can't get away with a vanilla extension cord.

	Terry Kennedy		Operations Manager, Academic Computing
	terry@spcvxa.bitnet	St. Peter's College, US
	terry@spcvxa.spc.edu	(201) 915-9381