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CHAPTER 5: Configuration
5. Configuration
The configuration controls for the ServSwitch Brand CAT5 KVM Extender for Sun
are inside the Remote Unit, 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 Remote Unit’s circuit boards can be damaged by static electricity, so
take
every reasonable precaution against it. At the very least, touch
a
metallic surface before opening the unit; 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 Extender for Sun 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 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
Up to 100 (328.1) Off (factory default)
100 to 200 (328.1 to 656.2) A
200 to 300 (656.2 to 984.3) B
NOTE
If you will be running cable to near the limit of one of these cable-length
ranges, say as far as 260 ft. (79.2 m), 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).
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