User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

7.7 VHF Receiver Module Type 8029

7.7.1 General

Received RF is passed from the antenna through the Duplexer to the Front End sub-

module Type 8018 where it is filtered and amplified. This RF is applied to the Receiver

module’s RF input, it is then filtered, amplified, mixed and demodulated.

The microcontroller on the Transmitter module provides metering for the receiver,

generates the automatic gain control (AGC) voltages, controls the Receiver module’s

synthesisers and stores receiver configuration information.

Figure 7.21: VHF Receiver Module in Place within Terminal

7.7.2 Testing and Fault Diagnosis

General

Note: Refer to Section 5 “Troubleshooting the EX7100” before reading this section.

The Transmitter module provides control to both the Receiver module and the Receiver

Front-End module (AGC and synthesiser setting) and also collects measurements from

the Receiver modules. An apparent Receiver problem may actually be caused by a fault

with the Transmitter module.