4-4 Chapter 4: Service 98-144591-D
Calibrating the master oscillator
10.
11.
The calibration process should result in a fi nal ppm value to lie within +/-0.030 and the Service Interface
indicate "Calibration OK". However, if the fi nal ppm-value lies outside the +/- 0.030 limit the calibration
attempt is ignored automatically and the original calibration value restored. The Service Interface will
indicate "Calibration failed".
To restore correct frequency accuracy of the transceiver the Exciter Control Module should be replaced.
12. Power down the radio system, disconnect the service PC and the AUX interface cable (PPS source
connection).
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