GL-T8200 1- to 25-Watt 900-MHz Power Amplifier
Glenayre Document Number: 9110.01306
CHECKOUT AND TROUBLESHOOTING
Rev. A: 03/23/99
Page: 8-2
Copyright © 1999 Glenayre
Print Date: 05/10/99
8.3.2
GL-C2000 Transmitter Controller Alarms
Another valuable source of PA troubleshooting data is the GL-C2000 alarm history. It is
accessed by connecting the VDT to the VT-100 connector on the front panel of the GL-
C2000 transmitter controller. Consult the GL-C2000 user manual for assistance in
accessing the controller alarm history.
If the GL-C2000 has a telephone line connected to its modem output, its alarm history can
be accessed remotely through the use of the Glenayre GL-N2000 console, or with a
computer which is running a communication program with VT-100 emulation and has a
2400-baud modem.
The GL-N2000 console equipped with version 3.5 or later software can also perform an
over-the-air connection if telephone lines are not connected to the GL-C2000 controller.
8.3.3
Operational Checks
If the transmitter is operational, valuable troubleshooting information can be obtained by
comparing the present transmitter operating parameters, obtained through the exciter VDT
connection, to the parameters from the factory transmitter data sheets; or (if available) from
the transmitter parameters log.
8.3.4
Power Amplifier Current Measurement
Refer to Table 8-1, PA Board Current. The PA board has provisions to measure the current
flow of the first and second stage.
Table 8-1 PA Board Current
PA board function
transistor current measured
first stage
measure Q1 current
second stage
measures Q2 current
