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SERVSWITCH™ PROFESSOR
By contrast, coaxial CPU and User Cables (required for XGA applications, and
recommended for most other applications) do much better at maintaining video
quality, as shown in Table 4-2. (For the meaning of quality numbers
3
,
2
, and
1
, see
the bottom of the previous page.) The distances in the table are total lengths of
coaxial CPU and User Cable between the CPU and the monitor; as before, these
measurements do
not
include any bus-cable length.
Table 4-2. 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
3
3
3
3
3
3
2
2
800 x 600 noninterl.
3
3
3
3
3
3
2
2
1024 x 768 interlaced
3
3
3
3
3
3
2
2
1024 x 768 noninterl.
3
3
3
3
2
2
2
1
1280 x 1024 interlaced
3
2
2
2
2
1
1
1
1280 x 1024 noninterl.
3
2
2
1
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).
For Professor-to-CPU or Professor-to-monitor runs over 100 feet (30.5 m), Station
Extenders or CAT5 KVM Extenders might be required. Call Black Box for
technical support to discuss this option.
