Black Box SW723A-R4, SW722A-R4, KV3108SA-R4 Video Quality vs. Distance for Original Serv Cables

CHAPTER 4: Operation: Hardware and Keyboard Commands

The ServSwitches will support SVGA (Super VGA) video, but with original Serv cables the video quality will decrease markedly at higher resolutions and distances. Table 4-2, below, illustrates this. The distances in the table are total cable lengths measured from the CPU to the monitor. The table assumes that one ServSwitch is between the CPU and monitor; in a cascaded application with a ServSwitch and one or more submasters between the CPU and monitor, video quality will always be lower.

Table 4-2. Video Quality vs. Distance for Original Serv Cables

Distance	5' (1.5 m)	10' (3 m)	15' (4.6 m)	20' (6.125'm) (7.6 m)
Resolution
640 x 480	3	3	3	3	3

800 x 600 noninterlaced

3

3

3

2

2

1024 x 768 interlaced

3

3

2

2

2

1024 x 768 noninterlaced

3

2

2

2

2

1280 x 1024 interlaced

2

1

1

1

1

1280 x 1024 noninterlaced

2

1

1

1

1

1600 x 1280 noninterlaced

2

1

1

1

1

Quality 3 = Near perfect; screen defects are not conspicuous

Quality 2 = Good to very good; images are clear; there are small reflections around text lettering depending on the color; screen defects are sometimes conspicuous

Quality 1 = Fair to poor as distance increases; images run from slightly fuzzy to badly smeared; text runs from fuzzy but readable to completely washed out

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