22
SERVSWITCH™ JR. MP
By contrast, coaxial 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.) As before, the distances in the table are total cable lengths
measured from the CPU to the monitor.
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
1600 x 1280 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 CPU-to-monitor distances over 200 feet (61 m), Station Extenders or CAT5
KVM Extenders might be required. Call Black Box for technical support to discuss
this option.
