Technical Manual

EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd 7-23 Issue 4 - August 2001
7.5 VHF RF Power Amplifier Module Type 8028
7.5.1 General
The VHF RF Power Amplifier module is driven by a modulated signal on the required RF
frequency by the VHF Transmitter module Type 8027. Refer to Figure 7.6 “VHF RF
Connection Diagram” for details.
The Transmitter module maintains a constant RF output power adjusting the drive level
as necessary. The Power Amplifier is a wideband device and requires no tuning
Various metering outputs, including forward power, reverse power and heat sink
temperature, are monitored by the Transmitter module (refer to Section 4.2.1).
The Power Amplifier requires forced air cooling of the heat sink, a dual-fan assembly is
fitted to provide this. Refer to the supplement at the front of this Manual for further details.
Note: Exicom recommends fan replacement every 5 years.
Figure 7.13: VHF RF Power Amplifier Module in Place within an EX7100 Terminal