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SERVSWITCH™ AND SERVSWITCH ULTRA™
The IBM and multiplatform 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.
This table also applies to Mac video in ServSwitch systems in which the Mac
versions of the original Serv cables (our product codes EHN210 and EHN215)
have been installed.
Table 4-2. Video Quality vs. Distance for Original Serv Cables
Resolution
Distance
5' (1.5 m) 10' (3 m) 15' (4.6 m) 20' (6.1 m)
25' (7.6 m)
640 x 480 333 3 3
800 x 600 noninterlaced 3332 2
1024 x 768 interlaced 3322 2
1024 x 768 noninterlaced 3222 2
1280 x 1024 interlaced 2111 1
1280 x 1024 noninterlaced 2111 1
Quality 3 = Near perfect; screen defects are not conspicuous
Quality 2 = Good to very good; images are clear; there are small reflections around
text lettering depending on the color; screen defects are sometimes
conspicuous
Quality 1 = Fair to poor as distance increases; images run from slightly fuzzy to
badly smeared; text runs from fuzzy but readable to completely
washed out