Comnet MLS II MLSH041, Руководство по обслуживанию

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LBI-38425A ALIGNMENT AND TROUBLESHOOTING PROCEDURES
14
5.1.3 Transmitter Frequency Adjustment
STEP
METERING
POINT
TUNING
CONTROL
METER
READING PROCEDURE
NOTE
This step assumes the frequency
is measured when the
transmitter is first keyed. If
delayed, the rapidly rising
ambient temperature must be
taken into consideration. The
Oscillator frequency should be
set at 25°C ambient
temperature.
1 J201 (or J1) FREQ TRIM
Control on
TCXO
(XU201)
Channel
Operating
Frequency
Press the PTT switch while
monitoring RX/EX injection
frequency at J201. Adjust FREQ
TRIM Control on TCXO
(XU201) for the assigned channel
frequency ±0.5 PPM.
Figure 6 – Synthesizer Adjustment