Path: utzoo!attcan!uunet!murtoa.cs.mu.oz.au!munnari.oz.au!bruce!trlluna!rhea!aduncan
From: aduncan@rhea.trl.oz (Allan Duncan)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Interlace and Multiscan Moniters
Message-ID: <654@rhea.trl.oz>
Date: 18 Aug 89 06:38:43 GMT
Organization: Telecom Research Labs,IPF,Melbourne, Australia
Lines: 26

From article by mikela@tekig3.LEN.TEK.COM (Mike Larson):
> I recently connected my A1000 to an Intec multiscan moniter (this moniter
 
> This multiscan performed flawlessly when the Amiga was displaying a
> non-interlaced screen.
> An interlaced screen, however, showed an incredible amount of flicker, much
> worse than my 1080.  Upon closer inspection of the CRT I realized that
> the odd and even frames were being SUPERIMPOSED on each other rather
> than being displaced by half of a scan line.

If the scan-lines were over the corresponding ones from the previous
field, you would not expect to get worse flicker, rather you have an
approximation of non-interlace.  If, however, there was a substantial
vertical offset between the odd and even fields, severe flicker would
appear.  If you had been feeding composite sync to the monitor (as used
by the 1080) there could have been interaction with the complicated
vertical sync region (designed for cheap valve sync circuits when I was
but a lad).  All I can offer is that the unit is iffy, OR it has
significantly brighter output.  Flicker is strongly brightness
dependant.

-- 
Allan Duncan	ACSnet	aduncan@rhea.trl.oz
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Telecom Research Labs, PO Box 249, Clayton, Victoria, 3168, Australia.