Black Box ServSwitch SW721AE-R2, User Manual

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CHAPTER 4: Operation
Coaxial cables do well at maintaining video quality, as shown in Table 4-1. The
distances in the table are total cable lengths measured from the CPU to the
monitor. The table assumes a single ServSwitch is between the CPU and monitor.
Table 4-1. Video quality vs. distance for coaxial cables.
Resolution Distance(feet)
5' 10' 20' 35' 50' 75' 100' 150' 200'
640 x 480 Z4 Z4 Z4 Z3
C4 C4 C4 C4 C4 C4 C4 C3 C3
800 x 600 Z4 Z4 Z4 Z3
C4 C4 C4 C4 C4 C4 C4 C3 C3
1024 x 768 Z4 Z4 Z4 Z3
C4 C4 C4 C4 C4 C4 C3 C3 C2
1280 x 1024 Z4 Z3 Z3 Z3
C4 C4 C4 C3 C3 C3 C2 C2 C2
Z = Standard coax cabling (EHN151)
C = Coax cabling (EHN282)
4 = Perfect or near perfect; unable to easily detect defects in screen.
3 = Very acceptable; images clear, small reflections around lettering depending upon
color; if you examine the screen closely, you will find defects.
2 = Acceptable; slightly fuzzy images; readable text, acceptable for casual use, but
not for prolonged viewing since this will cause eye fatigue.
1 = Unusable; images smeared; text not easily readable.
75 Hz refresh rate used for testing.
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).