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Article View: comp.sys.ibm.pc.hardware.video
Article #805

Re: Video Signal through Switchbox

#805
From: Gosharks
Date: Thu, 06 Jul 2000 00:00
66 lines
2719 bytes
"Splezunk" <splezunk@usa.net> wrote:
>Thanks Rodent,
>
>The cables are cheapies, but I spoke to the computer store, and
they are
>ordering in higher quality ones.  Hopefully that will solve the
problem.
>
The cables may help, but they will not cure the problem. Cheap
switch boxes are notorius for causing gosting and other artifacts
on the screen. Most switch boxes are rated for video bandwidth or
frequency. If you are running 1280 x 1024 at 85Hz, the pixel rate
or bandwidth is running around 157.5Mhz. At least that is the
Vesa standard. I recommend you find a switch box rated at least
1.5 times the video rate.

Cables should 75ohm coaxial. Cheap twisted pair cables will also
cause ghosting.

Good Luck

Jim at http://www.monitorsdirect.com
>"rodent" <vips1@zdnetmail.com> wrote in message
>news:8juadi$s5k$1@arachne.labyrinth.net.au...
>> have you tried better quality VGA cables?
>> Splezunk <splezunk@usa.net> wrote in message
>> news:3962966a@isupx1.isd.tafensw.edu.au...
>> > Hi all,
>> >
>> > I have two PC's, and I just recently got a switchbox so they
can use the
>> > same Keyboard, Mouse and Monitor...
>> >
>> > Monitor Works OK at below 70Hz refresh rate (1280x1024) but
it seems
>that
>> > the more I increase the refresh rate the worse it gets.  I
am used to
>> > running at 85Hz
>> >
>> > My question to all of you, is what Can I do to boost the
signal, or am I
>> > stuck with this using the switchbox?
>> >
>> >
>> > Thanks
>> > Zunk
>> >
>> >
>>
>>
>
>
>
>


jim at http://www.monitorsdirect.com



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From: Gosharks <jwitkowskiNOjwSPAM@cptmail.com.invalid>
Subject: Re: Video Signal through Switchbox
Date: 2000/07/06
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