SERVSWITCH™
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The ServSwitches will support SVGA (Super VGA) video, but with original Serv
cables the video quality will decrease markedly at higher resolutions and distances.
Table 4-2, below, illustrates this. The distances in the table are total cable lengths
measured from the CPU to the monitor. The table assumes that one ServSwitch is
between the CPU and monitor; in a cascaded application with a ServSwitch and
one or more submasters between the CPU and monitor, video quality will always be
lower.
Table 4-3. Video Quality vs. Distance for Original Serv Cables
Distance
Resolution
5' (1.5 m) 10' (3 m) 15' (4.6 m) 20' (6.1 m) 25' (7.6 m)
640 x 480
3 3 3 3 3
800 x 600 non-interlaced
3 3 3 2 2
1024 x 768 interlaced
3 3 2 2 2
1024 x 768 non-interlaced
3 2 2 2 2
1280 x 1024 interlaced
2 1 1 1 1
1280 x 1024 non-interlaced
2 1 1 1 1
1600 x 1280 non-interlaced
2 1 1 1 1
CAUTION!
Some CPUs can’t drive or receive keyboard and mouse signals across
longer runs of coaxial cable. Consult with the manufacturers of your
CPUs before installing this cable in lengths greater than 20 ft. (6.1 m).
One last note of caution about video: The IBM 9515, 9517, and 9518 monitors
that come with some PS/2 systems are not normal VGA monitors and require
special cabling in order for video to be correctly sized and synchronized. Call Black
Box for technical support if you want to use one of these monitors.
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