Specifications

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).