MAINTENANCE
Section 17, Page 27 May 2002
14. Wait for about one minute to determine that the adjustment is stable. If movement in the
phase meter resumes, very carefully adjust the mechanical trim to stop the motion.
15. CYCLE THE POWER ON/OFF BUTTON TO OFF, replace the screw covering the
adjustment hole, and put the receiver back together again.
16. Turn on the power and wait for 10 minutes before attempting to fine-tune the crystal
frequency. Synchronize the two units by executing the Synchronize to XMT option in
the Diagnostic program of the GDP-32
II
(Press in the Main Menu).
The above procedure should permit accurate synchronization once again.
Mechanical adjustment of the large case GDP-32 crystal
After both the receiver and transmitter controller have had power applied for at least 60 minutes,
the procedure above can be used to adjust the mechanical trim. The crystal in the large case
configuration is mounted on the calibration and timing board. The board is located in the left-
most slot of the analog card cage, accessible by opening the battery compartment (bottom lid) of
the GDP-32
II
. Follow the same procedure as indicated for the GDP-32
II
T.
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