Motorola ASTRO 25 GTR 8000 - RFDS - External Dual Circulator;Isolator Tray (700;800 Mhz); RFDS - External Dual Circulator;Isolator Tray (UHF); Figure 23: External Dual Circulator;Isolator Tray (700;800 Mhz)

2.3.8
RFDS - External Dual Circulator/Isolator Tray (700/800 MHz)
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.
Figure 23: External Dual Circulator/Isolator Tray (700/800 MHz)
2.3.9
RFDS - External Dual Circulator/Isolator Tray (UHF)
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.
MN003286A01-E
Chapter 2: GTR 8000 Base Radio Theory of Operation
75