Norsat O3b 5W BUC - Manual (Page 24)

Rev. 1.0
7005STC-O3B Series
DES007565
24
6. MAINTENANCE AND TROUBLE SHOOTING
6.1 MAINTENANCE
Ka band 5W BUC is designed for a minimum of maintenance and does not use fans for cooling.
Instead, it has one heat sinks with lots of air cooling fins on the body of the BUC for cooling.
Therefore, periodic scheduled maintenance is not required. However, make sure that it is mounted
upside down so that fins of the body heat sink are open to fresh air as shown in Fig. 7. And check
periodically that there are no objects that obstruct a flow of fresh air into the fins of the body heat
sink.
6.2 TROUBLE SHOOTING
The BUC GUI window shows various status of the BUC such as LO Lock, Over-temperature, and
External Mute. These states indicate the faults that may arise in the BUC. The BUC is designed to
automatically turn on the SSPA to avoid transmitting unwanted power to the target satellite if one of
LO Lock, Over-temperature, and External Mute states becomes red on BUC GUI window during the
operation.
The following explains two major types of faults and how to troubleshoot them.
A) SSPA is off
1) When LO Lock state became red on the BUC GUI window.
- The internal LOs are out of lock.
 Check the power level of 10MHz reference source at the modem side or at the
BUC input side.
 Otherwise, since the BUC is faulty, contact Norsat for further support.
2) When Temperature value is out of its normal range (-40 ~ +85 o C) on the BUC GUI window.
- The BUC is faulty if the BUC is hot
 Contact Norsat for further support
- M&C processor is temporally malfunctioning if the BUC is not hot.
 Turn off the main power supply of +48V and wait for about 5 minutes, and then turn
on again and check the Over-temperature state on the BUC GUI window.
3) When Over-power became red on the BUC GUI window.
- IF input power is too high
 Check the IF input power level.
- Or, the BUC is faulty
 Contact Norsat for further support.