[SunRescue] PowerMac 7600 questions

[Eric Ozrelic]

A Sony Trinitron Flat CRT paired with a Matrox G400 Max, and a really nice
HD15 to BNC cable produces the best picture quality. I've tried combinations
of cheaper video cards that supported the same resolution and refresh rates
but they produced inferior results at higher resolutions. Mostly because the
OEM's in an order to save money use crappy filters, or less filters, and
cheaper DAC's.

I've also tried the cables that come with the monitor, and a few other
cables which produced inferior results. My thought is that just like the
lower cat rating on a 4 pair cable, that monitor cables can only carry a
certain frequency ranges stably. That's why a big fat BNC cable will do
better then an 'el cheapo HD15 to HD15.

The monitor always makes a difference too. Invar shadow mask monitors blow.
Aperture grill is the only way to go. I've had excellent experiences with
Sony (too pricey though), IIYAMA, and some high end Viewsonic.


Regards,

Eric Ozrelic
Computer/Network Consultant

1532 NW West Hills Ave
Bend OR 97701-1043

-----Original Message-----
From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On Behalf Of
Jeff Borisch
Sent: Saturday, April 21, 2001 1:15 PM
To: rescue at sunhelp.org
Subject: Re: [SunRescue] PowerMac 7600 questions

Kurt Mosiejczuk wrote:

> I miss my last job with a 21" monitor at 1600x1200 at 32-bit color.
> Scary thing was, windows was always fuzzy so I dropped it to
> 1280x1024, but linux (XFree86) was always nice and sharp.

Could be linux was using a lower refresh rate.

One strange thing I found when trying to get my monitor sharper, is that
lower refresh rates would be sharper than higher ones.

Both refresh rates were in spec BTW. 88Hz vs. 75Hz.

My theory is that the beam is on any one pixel longer with lower refresh
rates. And has more time to go from full on (white) to full off (black). I
seemed to have less of a halo effect when I was at the lower refresh.

I was testing all kinds of stuff at the time. I wish I had written it down.

YMMV I don't know relatively little about monitors. These were just my
observations.

--jeff

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