GL-T8541 PA
Glenayre Document Number: 9110.01002
CHECKOUT AND MAINTENANCE
09/10/99
Page: 7-10
Copyright © 1997 Glenayre
7.
Adjust driver board Q1 bias using the following sub-routine:
A. Remove JW1 from the driver board.
B. Connect a current meter between test points TP1 and TP2.
C. Apply power to the transmitter, but do not key it.
D. Adjust R6 for a Q1 idle current of 20 +/- 5 mA as displayed on the meter.
Refer to left side of Figure 7-6.
E.
Remove power from the transmitter.
F.
Remove the meter from the test points
G. Replace jumper JW1.
8.
Adjust the Q2 bias using the following sub-routine:
A. The exciter RF output should be disconnected.
B. Apply power to the transmitter.
C. Enter the forward power calibrate mode and key the transmitter (key
sequence m-5-6-1).
D. Adjust R16 for a Q2 idle current of 1.0 +/-0.2A on the VDT. Refer to left
side of Figure 7-6.
E.
Unkey the Transmitter and press the escape key to exit the calibration mode.
F.
Remove power from the transmitter.
9.
Remove all power and reconfigure the transmitter for normal operation.
