User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

Figure 7.7: VHF Transmitter Module in Place within an EX7100 Terminal

7.3.2 Testing and Fault Diagnosis

General

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

The Transmitter module provides control to the Receiver module, the Receiver Front-End

module and the Transmitter RF Power Amplifier. It collects measurements from all of

these modules and interacts with the Modem/Controller module.

For this reason, a faulty Transmitter module may cause symptoms that appear elsewhere

while faults elsewhere may cause symptoms to appear at the Transmitter module.

The module contains semi-conductor components that are

sensitive to electrostatic damage.

Electrostatic sensitive devices should only be stored and

transported inside electrically conductive static shielding

bags. Fault finding and module replacement must be

performed at “electrostatically safe work stations” where the

work bench surface; soldering iron and the operator are all

earthed to prevent the build up of harmful electrostatic

charges.

The RF Power Amplifier module must not be run without a

50Ω load on its output. Failure to meet this condition may

damage the amplifier.