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SERVSWITCH BRAND CAT5 KVM EXTENDER FOR SUN
I get a constant vertical wobble down the screen. What is the cause of this interference?
1. The interconnection cable could be located too close to a source of very
strong electrical-power interference; reroute the cable if possible.
2. If the wobble forms a standing “beat pattern,” the extender is probably being
affected by a very strong signal from a nearby broadcast transmitter. The
solution in this case is to change the vertical refresh rate slightly (for example,
from 60 Hz to 70 Hz or vice versa).
3. You might require an alternative power supply for the Remote Unit. Call
Black Box Technical Support.
Connecting a keyboard to the Remote Unit has an adverse effect on the remote video.
Try using a newer keyboard. (Some older keyboards require too high a current
for the Remote Unit to properly drive the video signal.)
The Extender doesn’t seem to work correctly with my LCD panel.
Try reducing the refresh rate of the video signal that your graphics card is
outputting. (The maximum refresh rates supported by most LCD panels are less
than those supported by most monitors.)
8.1.5 P
OWER
I don’t need to use a keyboard in my application, but the extender doesn’t work at all unless I
have a keyboard line running from the Local Unit to the Sun CPU or KVM switch.
The extender’s Local Unit normally operates using the 5 volts of DC power that
the attached CPU or KVM switch supplies on its keyboard port. Even if you’re not
using a keyboard at either the local or remote user station, you should run a cable
from the Local Unit’s CPU-port keyboard connector to the keyboard port of the
CPU or KVM switch in order to power the Local Unit. If this is not possible, please
call Black Box Technical Support to discuss your application; you might need a
keyboard-port power supply for the Local Unit.
8.2 General Questions About the Extender
Is it possible to use an interconnection cable longer than 1000 feet (304.8 meters)?
The extender has been designed to produce acceptable results with SVGA resolutions
at the maximum cable length of 1000 ft. Therefore, it might be possible for you to
run as far as 1640 ft. (499.9 m) at the standard VGA resolution of 640 x 480.
However, we do not recommend doing this and cannot guarantee that it will work.
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