Re: TAAC and Dunn/Matrix camera on long lines

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Article #10353

#10353

From: Peter G. Ford
Date: Wed, 18 Jan 1989 04:25

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I, too, run a Sun/260C with TAAC and Dunn/Matrix Multicolor, and have
experimented with various cable extensions.  Anything longer than the
cable supplied by Sun seems to cause some ghosting, but the severity
varies with the configuration, specifically:

* The sequence Sun->Taac->Multicolor->Monitor is a better impedence
  match than Sun->Taac->Monitor->Multicolor. The DC resistance really
  doesn't make any difference. It's the impedences within the video
  bandwidth that must match.

* High-quality 75 ohm cable makes a difference. Use the best.

* Make sure that each of the 4 R-G-B-S cables is the same length.

Please let me know how this works out. I'd like to extend my own monitor
cable to about 50', but haven't found a really satisfactory solution yet
myself.

 Peter G. Ford 			Inet:	pgf@space.mit.edu
 MIT Center for Space Research	UUCP:	..!mit-eddie!space!pgf
 Cambridge, MA 02139		Span:	MITCCD::PGF
 +1 617 253 6485		Gte:	[PFORD/JPL/NASA] NASAMAIL/USA

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!lll-winken!lll-lcc!ames!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: pgf@space.mit.edu (Peter G. Ford)
Newsgroups: comp.sys.sun
Subject: Re: TAAC and Dunn/Matrix camera on long lines
Message-ID: <8901130512.AA16522@rice.edu>
Date: 18 Jan 89 04:25:42 GMT
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Original-Date: Fri, 13 Jan 89 00:12:21 EST
X-Sun-Spots-Digest: Volume 7, Issue 108, message 13 of 16