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<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'>It
might be the cabling—the TV off In a room downstairs and I ran cat-5 to
it, then put s-video and analog audio connectors onto the twisted pairs.
Its about 45 feet of cable, and I was afraid when I ran it that some distortion
would occur… but the fact that my laptop drives perfect video and sound
encouraged me. I wonder if there is poor enough shielding near the
connecter itself where the twisted pairs had to be un-twisted that the vga
cable is polluting it. I’ll play around with all sorts of these
things when I get home—I really appreciate the input. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'>-Will<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Tahoma'>From:</span></b><span
style='font-size:10.0pt;font-family:Tahoma'> mythtv-users-bounces@mythtv.org
[mailto:mythtv-users-bounces@mythtv.org] <b>On Behalf Of </b>Brian Wood<br>
<b>Sent:</b> Wednesday, June 07, 2006 11:10 AM<br>
<b>To:</b> Discussion about mythtv<br>
<b>Subject:</b> Re: [mythtv-users] video distortion</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>On Jun 7, 2006, at 9:00 AM, Will Constable wrote:<o:p></o:p></p>
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<br>
<o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:Arial;color:navy'>I’m running two
different resolutions, spanning desktops on vga and s-video. This could
be the problem I suppose – would unplugging the vga monitor do the trick
or do I have to boot with the output disabled?</span><o:p></o:p></p>
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style='font-size:10.0pt;font-family:Arial;color:navy'> </span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>It's basically a try-and-see
situation.<o:p></o:p></p>
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<p class=MsoNormal>What you are seeing is the horizontal sync bar from your vga
video floating through your S-Video signal. It all makes sense once you
mentioned that you're using two monitors.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>The cross-coupling can happen in different ways. One is
simply magnetic coupling between the two monitors, see what happens if you
simply power down the VGA monitor.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>The only way to fix that type of problem is to move the
monitors further away from each other, or use some type of magnetic shielding
such as "mu-metal". Using better shielded monitor(s) would help as
well.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>You could also be getting cross-talk between the cables,
using better shielded cables might help this sort of problem.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>The cross-talk could also be happening in the video card
itself, but a newer "better" card might or might not be better
shielded.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Like I said, you will just have to experiment and see what
helps.<o:p></o:p></p>
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