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CHAPTER 4: Operation: Hardware and Keyboard Commands
The ServSwitch Ultra 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 Ultra is between the CPU and monitor; in a cascaded application with a
ServSwitch Ultra 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 Ultra systems in which the Mac
versions of the original Serv cables (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
3
3
3
3
3
800 x 600
3
3
3
2
2
1024 x 768 interlaced
3
3
2
2
2
1024 x 768 noninterlaced
3
2
2
2
2
1280 x 1024 interlaced
2
1
1
1
1
1280 x 1024 noninterlaced
2
1
1
1
1
1600 x 1280
2
1
1
1
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
