Comnet MLS II MLSH041, Руководство по обслуживанию

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LBI-38425A ALIGNMENT AND TROUBLESHOOTING PROCEDURES
18
5.2 TRANSMITTER
Alignment and troubleshooting procedures for Transmitter circuitry on the
Transmitter/Receiver board CMN-233 are as follows:
5.2.1 General Description of Adjustment
This manual is prepared for adjustments and confirmations of the Exciter/PA section and
covers the following items:
5.2.2 Measuring Instruments
•
AVR (DC Power Supply DC 0-20V, 20A)
•
Power Meter (usable at the value above 80 W)
•
Directional Coupler
•
Signal Generator
•
Spectrum Analyzer
•
Attenuator (30 dB, above 80 W)
•
Tester
STOP
START
Confirming the Voltage
Confirming the APC Section
Adjustment and Setting of the Transmitting Output
Initial Setting
1
2
3
4
DC power ON
SG, PTT ON