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- Path: sparky!uunet!cs.utexas.edu!usc!hela.iti.org!cs.widener.edu!dsinc!bagate!cbmvax!grr
- From: grr@cbmvax.commodore.com (George Robbins)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: AGA artifacts, shimmer
- Message-ID: <37914@cbmvax.commodore.com>
- Date: 15 Dec 92 19:47:37 GMT
- References: <dej.026x@qpoint.ocunix.on.ca> <92349.200813FAA102@psuvm.psu.edu> <1992Dec15.032707.8522@netcom.com>
- Reply-To: grr@cbmvax.commodore.com (George Robbins)
- Organization: Commodore, West Chester, PA
- Lines: 44
- Keywords: AGA
-
- In article <1992Dec15.032707.8522@netcom.com> tres@netcom.com (Gary Chow) writes:
- > In article <92349.200813FAA102@psuvm.psu.edu> <FAA102@psuvm.psu.edu> writes:
- > >In article <dej.026x@qpoint.ocunix.on.ca>, dej@qpoint.ocunix.on.ca (David Jones)
- > >says:
- > [stuff deleted]
- > >>On all of the AGA machines, a fine pattern of vertical lines could
- > >>be seen on the screen. The lines were 8 pixels apart. On one machine,
- > [stuff deleted]
- > >>
- > >>Have any AGA users out there noticed the same thing? Commodore, what
- > >>will you do about it?
- > >>
- > >>--
- > >> David Jones, 6730 Tooney Drive, Orleans, Ontario K1C 6R4 CANADA
- > >>
- > >
- > >I think you're seeing things. I saw a demo on a 1960 monitor and the 4000 perfo
- > >rmed flawlessly. The pictures were incredibly good.
- > >
- > >
- > >Name------Frederick-Aaron------| ///
- >
- > I have a 4000 sitting right in front of me. And I can assure you that
- > David is not "seeing things" there are vertical lines 8 pixels apart!
- > (But you have to look real close) ... and it doesn't really bother me
-
- What you may see is a faint pattern of vertical bright and dim bars.
- This is most obvious on a plain grey background with the contrast on
- the monitor cranked all the way up and all invisible with real images
- or text on the screen. If you're looking for some kind of sharp lines
- or radical zebra strips you won't see them.
-
- The pattern is basically visual evidence of the internal 3.58 MHz cycle
- pattern. It's the kind of thing that we'll try to improve over time,
- but it's all but impossible to compeletely eliminate.
-
- Someone else mentioned shimmer or a kind of swimming motion. This is
- usually due to having two monitors in close proximity without any
- magentic shielding between them and not a feature of the video output.
-
- --
- George Robbins - now working for, work: to be avoided at all costs...
- but no way officially representing: uucp: {uunet|pyramid|rutgers}!cbmvax!grr
- Commodore, Engineering Department domain: grr@cbmvax.commodore.com
-