Power Amplifier Input/Output Connections; Figure 2-6 Power Amplifier Module - Motorola GTR 8000 Manual

The power amplifier (PA) is a forced convection-cooled RF power amplifier. It accepts a low-level modulated RF
signal from the transceiver module, and amplifies it for transmission through the site transmit antenna. Also, to
complete the Cartesian correction loop (linearization method), it provides a low level RF feedback signal to the
transceiver module to achieve the required transmitter linearity.
Transmit power output can be set using Configuration/Service Software (CSS). See
Values and Battery Type , page
The power amplifier also performs functions related to the fan module, including reporting of the fan module status
and supplying power to the fan power bus.

Figure 2-6 Power Amplifier Module

The power amplifier is comprised of six internal modules:
• Core Board
• Converter Board
• Driver Amplifier Board
• Final Amplifier Board
• Distribution Board
• Output Circuitry

2.1.2.1 Power Amplifier Input/Output Connections

There are three electrical connection assemblies on the power amplifier:
• RF output (front QN "quick-N" connector) on front of power amplifier module
This is cabled to the N-type female bulkhead connection at the rear of the base radio housing.
• DC power supply/control signal (backplane connection)
6871022P86-A - November 2012
4-31.
2.1.2.1 Power Amplifier Input/Output Connections
4.4.10 Configuring Tx Power
2-5