Glenayre Document Number: 9110.00160
250-Watt Gold Line Power Amplifier
Issue 1, Rev. C: 10/21/96
DESCRIPTION
Print Date: 12/17/96
Copyright © 1996 Glenayre
Page: 3-1
3
DESCRIPTION
3.1
Introduction
Figure 3-1, 250-Watt, 900-MHz Power Amplifier Front View, and Figure 3-2, 250-Watt,
900-MHz Power Amplifier Rear View,show the Gold Line power amplifier (PA). This is a
250-watt PA intended for use in a GL-T8500 paging transmitter with an RF of 900 MHz
nominal. This PA is characterized by integrated monitoring devices that supply critical
status information to a Gold Line exciter/PA control (exciter). This exciter contains diag-
nostic software that can detect and report a faulty PA circuit board.
3.2
Physical Description
3.2.1
Mounting Provisions
The PA is mounted to the front of most standard 19-inch equipment racks by means of eight
screws. The front panel of the PA may by removed while the PA is mounted in the rack.
Two quarter-turn fasteners secure the front panel to the PA. Most PA circuit boards may be
replaced while the PA is mounted in the rack.
3.2.2
PA Front
Figure 5-1
shows the front view of the PA with the front panel removed. This exposes the
RF and shielded compartments, which contain the PA circuit boards.
Table 3-1
lists the PA
circuit boards.
3.2.2.1
Driver Board
The driver board (A1) contains the preamp module, the intermediate PA (IPA), and the PA
drivers (driver-1 and driver-2). These devices, in addition to one resistor, are mounted
directly on the PA heat sink. The driver board contains three connectors: two on the front
(J1 and J2) and one on the back (J3). Two RG316-type cables (not shown) are attached to
the front of the board.
Table 3-1 PA Circuit Boards
nomenclature
part number
location
driver board A1
263-0082-022
RF compartment
PA1 board A2
263-0082-007
RF compartment
PA2 board A3
263-0082-007
RF compartment
combiner board A4
263-0082-021
RF compartment
metering board A5
263-0082-018
shielded compartment
