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MATRIX SERVSWITCH™
By contrast, coaxial cables (standard for Sun applications, required for XGA
applications, and recommended for most other applications) do much better at
maintaining video quality, as shown in Table 3-3. (For the meaning of quality
numbers 3, 2, and 1, see the bottom of the previous page.) As before, the distances
in the table are total adapter-cable lengths (not including Expansion Cable)
measured from the CPU to the monitor. Also as before, the table assumes a single
Matrix ServSwitch is between the CPU and monitor; if there are other chained
Switches as well, video quality will always be lower. (Where “interlaced” or
“noninterlaced” isn’t specified, noninterlaced video is implied.)
Table 3-3. Video quality vs. distance for coaxial cables.
Resolution
Distance 10 ft. 20 ft. 30 ft. 50 ft. 75 ft. 100 ft. 150 ft. 200 ft.
(3 m) (6.1 m) (9.1 m) (15.2 m) (22.9 m) (30.5 m) (45.7 m) (61 m)
640 x 480 33 3 3 3 3 3 3
800 x 600 33 3 3 3 3 3 2
1024 x 768 interlaced 33 3 3 3 3 2 2
1024 x 768 noninterl. 33 3 3 3 2 2 1
1280 x 1024 interlaced 33 3 3 2 2 1 1
1280 x 1024 noninterl. 33 3 2 2 1 1 1
1600 x 1280 33 2 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).
If all of your CPUs are IBM PC compatible, and you want to drive signals across
CPU-to-Switch or Switch-to-monitor distances over 100 feet (30.5 m), you might
require Station Extenders or CAT5 KVM Extenders (see Appendix B). Please call
Black Box Technical Support to discuss your application.
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