Technical Manual

EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd 7-28 Issue 4 - August 2001
7.6 UHF RF Power Amplifier Module Types 8048 (10W) & 8051 (2W)
7.6.1 General
The UHF RF Power Amplifier module is driven by a modulated signal on the required RF
frequency by the UHF Transmitter module Type 8053. Refer to Figure 7.9 “UHF RF
Connection Diagram” for details.
The Power Amplifier module maintains a constant gain of 50dB (43 dB for 2W PA); with
RF output power being adjusted in the transmitter drive stage.
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 is a wideband device covering the following bands without manual
retuning:
> 403-455 MHz or 450-520 MHz for 10 Watt PA type 8048.
> 403-520 MHz for 2 Watt PA type 8051.
To assist in cooling, dual fans and an enclosure are fitted over and around the PA heat
sink
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Figure 7.16: UHF RF Power Amplifier Module in Place within an EX7100 Terminal
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10 Watt PA only, 2 Watt utilises heat sink only