HR
X
-C-HB-3
V
IA
L
ITE
HD
C-B
AND
L
INK
H
ANDBOOK
31
5
Maintenance and fault finding guide
Refer to the following table that gives a list of commonly encountered problems and suggested
solutions.
Fault
Possible Causes
Solution
Power LED does
not illuminate.
Power is not connected to the
PSU.
Module is not fully inserted.
Connect mains power to the rear of the PSU.
Check fuses of power leads.
Check module is properly aligned and handle
pawls are fully engaged.
Check there are no obstructions to the rear
such as optical cable protective covers.
Difficulty inserting
module.
Incorrect alignment.
Incorrect module slot.
Check that the module is correctly fitted in card
guides.
Check that module is in correct slot.
Slots 1-13 for 5HP modules.
Alarm LED in
ALARM state.
LNA Feed is in current limit.
Laser degraded.
Low optical level at receiver.
Check external load.
Return to local
ViaLite Communications
office.
Check optical link for breaks / kinks.
Check all optical connectors are clean.
Low signal level.
Gain adjustment set too low.
RF feed not connected.
Optical loss too high.
Incorrect optical connectors
Incorrect manual or software
gain settings
Input power too high
Increase gain setting.
Check RF connections.
Clean and check Optical connections.
Ensure that optical cable matches the type of
connectors on you
ViaLiteHD
module, normally
cable and connector colours should match.
Reset to factory default.
Or reset to known good configuration
If input power exceeds the modules P1dB,
either reduce the input power, reconfigure the
module to increase P1dB or replace with a
more linear module (lower gain TX).
High
intermodulation
levels.
Gain adjustment set too high.
Incorrect manual or software
gain settings
Decrease TX gain setting.
Reset to factory default.
Or reset to known good configuration.
The
ViaLiteHD
range of RF transmitter and receiver modules are precision engineered and calibrated
for optimum performance and accuracy before dispatch.
In the event of any problems or queries arising with the equipment, please contact
ViaLite
Communications
or your local agent.
