GTR 8000 Base Radio
Figure 2-20
External Dual Circulator/Isolator Tray (UHF)
2.3.10 RFDS - External Dual Circulator/Isolator Tray (VHF)
An option for the GTR 8000 Base Radio is an External Dual Circulator module which isolates the base radio
from the antenna, thus preventing the transmitter from generating intermodulation. The circulator load dissipates
reflected power. It includes a cable that connects to the RF Peripherals port on the base radio backplane to provide
temperature monitoring.
2.3.11 Antenna Relay Module
The antenna relay module allows a single antenna to be used for both transmit and receive functions on a
conventional GTR 8000 Base Radio. The antenna relay module is controlled by a signal from the base radio
transceiver module and is typically mounted on the backplane cover on the rear of the base radio, or on the
peripheral tray if the base radio is equipped with other options.
shows the antenna relay module input
and output external connections. Settings for the antenna relay module are made through Configuration/Service
Software (CSS) and UNC.
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6871022P86-A - November 2012
Summary of Contents for GTR 8000
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