Rev. 2.0
7005STC-O3B Series
DES007565
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24
6) Once your PC or modem is connected with the BUC using either serial or Ethernet mode,
check various BUC status such as Output power, Temperature, LO Lock, Over-temperature,
Over-power, and external mute.
7) Turn on the IF power source with a proper power level according to the BUC specification
sheet, which enters the IF input port of the BUC.
8) To turn on the SSPA, make sure that all of LO Lock, Over-temperature, Over-power, and
External Mute states should be green. Then click SSPA ON button on BUC GUI window.
9) Adjust the BUC gain using Gain setting buttons such as MAX GAIN, MIN GAIN, and specific
gain values on the BUC GUI window.
10) If all of LO Lock, Over-temperature, and External Mute states are not green on BUC GUI
window, the SSPA does not turn on even though SSPA ON button is clicked.
During the operation, if one of LO Lock, Over-temperature, and External Mute states becomes
red on BUC GUI window, the SSPA is automatically turned off.
11) If you want to turn off the SSPA, just click SSPA MUTE button or pull out the External Mute
signal wire from the ground.
6. MAINTENANCE AND TROUBLE SHOOTING
6.1
MAINTENANCE
The Ka band 5W BUC is designed for minimal maintenance and an uses a heat sink with air cooling
fins. Regular maintenance is not required. Ensure that the fins of the heat sink are facing up as shown
in Fig. 7. Also, make sure that there are no objects that obstruct the flow of air into the fins.
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.
o
Check the power level of 10MHz reference source at the modem side or at
the BUC input side.
•
Or, the BUC is faulty
o
Contact Norsat International for further support.
2) When Temperature value is out of its normal range (-40 ~ +85oC) on the BUC GUI window.
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The BUC is faulty if the BUC is hot
o
Contact Norsat International for further support
•
M&C processor is temporally malfunctioning if the BUC is not hot.
o
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