RF Technology Pa50 Eclipse Series, Руководство по эксплуатации и обслуживанию

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RF Technology PA50 Page 3
1 OPERATING INSTRUCTIONS
1 Operating Instructions
The PA50 is part of the Eclipse range of modular base station equipment. It is a power
amplifier capable of delivering 120 Watts in the VHF frequency range. It is designed
to complement the T50 transmitter, and mounts in a standard Eclipse sub-rack.
1.2 Front Panel Indicators
PWR LED Power LED indicates that the PA50 is connected to a DC power source.
RFO LED RF Output LED indicates that the PA50 is being driven by the exciter
and RF Output is available at the antenna socket.
TEMP LED
Temperature LED indicates that the output transistors are above 90
degrees. This is only an indication and not an alarm condition as the
exciter monitors the PA50 temperature at all times in order to keep
within safe operating limits.
2 Internal Adjustments
All internal adjustments are factory set and should not need to be changed under
normal conditions.
R238 Driver bias adjustment
R239 O/P Q101 bias adjustment
R240 O/P Q100 bias adjustment
R227 Forward power meter adjustment
R228 Reverse power meter adjustment
C209 Reflectometer balance adjustment
WARNING
Changes or modifications not expressly approved by RF
Technology could void your authority to operate this
equipment. Specifications may vary from those given in
this document in accordance with requirements of local
authorities. RF Technology equipment is subject to
continual improvement and RF Technology reserves the
right to change performance and specification without
further notice.