Harris CZ1000F, Commissioning Manual

Page: 23 / 162

12/24/07 888-2685-001 1-7
WARNING: Disconnect primary power prior to servicing.
Section 1 Introduction
Ranger Commissioning Manual
Figure 1-3 PA Module Block Diagram
Each PA module consists of the following components:
a. PA Module Controller Board - Responsible for all monitoring and protection of
the module. Reports to the transmitter Main Controller via the CAN bus but is
also connected to the parallel control lines in case the CAN bus is not operational.
Also provides for FET switching and distribution of the +32Vdc power to the
driver and PA pallets and sensing of driver and pallet currents.
b. Phase and Gain Board - Provides for module phase and gain adjustments to mini-
mize the PA module combiner reject power for the CZ1000F.
c. One LDMOS Driver Pallet - Provides enough power to drive the 6 way splitter
and the inputs to the power amplifier pallets.
d. Six-way Pallet Splitter and Combiner.
e. Six (6) LDMOS Amplifier Pallets - When combined, they provide up to 400
watts of average power at the output of the module. These pallets are field
replaceable.
f. RF Output Directional Coupler - Samples both Forward and Reflected power for
metering, module ALC and module VSWR protection.
AB
PHASE
&
GAIN
CONTROL
BOARD
SS RELAY
AB
AB
AB
AB
AB
AB A
LDMOS FAULT
FWD
TEMP
Pin
+32V
BIAS
RF IN
TO MAIN CONTROLLER
SWITCHED
+32V
ON/OFF
MODULE ENABLE
DC
SHORT
32V
MON
RF
OUT