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SERVSWITCH™ BRAND CAT5 KVM/SERIAL/AUDIO EXTENDER
5. Configuration
The configuration controls for the ServSwitch Brand CAT5 KVM/Serial/Audio
Extender are internal, but should only need to be set once. To get at them, first
open the Unit by unscrewing the four screws on its case and lifting off the top half
of the case. When you’ve finished setting them, close the Unit by replacing the top
half of the case and screwing the screws back in.
CAUTION!
The Extender’s circuit boards can be damaged by static electricity, so take
every reasonable precaution against it. At the very least, discharge yourself
on a metallic surface before opening the Extender; if possible, stand on
an anti-static mat and wear a grounding strap or anti-static gloves.
5.1 Setting the Cable-Length Jumpers
The Remote Unit of the KVM/Serial/Audio Extender contains video-equalization
circuitry which compensates for the loss in image quality that occurs when you
drive video across long cables. With cables in the neighborhood of 300 meters
(1000 feet) long, this loss is considerable.
There are three jumpers on the main circuit board of the Extender’s Remote
Unit that you can use to select an equalization-adjustment range appropriate to the
length of the interconnect cable you’ll be running between the Local and Remote
Units. (Figure 5-1 on the next page shows where these jumpers are.) Once you set
them, you can alter the compensation level with the two rotary controls on the
Remote Unit’s front panel while the Extender is operating in order to “tune in”
the image more precisely (see
Section 6.4
).
The three cable-length jumpers should be set as follows (
all three jumpers must be
set the same way
):
Cable Length in Jumper
Meters (Feet)
Position
0 to 100 (0 to 330)
Off
(factory default)
100 to 200 (330 to 655)
A
200 to 300 (655 to 1000)
B
NOTE
If you will be running cable to near the limit of one of these cable-length
ranges, say as far as 80 m (260 ft.), and you will be using high-resolution
(1024 x 768 or higher) video, you might be able to achieve more accurate
video compensation (see
Section 6.4
) by selecting the higher cable
length range (the 100-to-200-m range in this case).
