MTR3000 Radio Frequency Distribution System (RFDS) Equipment: Description 9-3
9.1.1.3 External Dual Circulator Tray
An option for the MTR3000 Base Station/Repeater is an External Dual Circulator module which
isolates the base station/repeater from the antenna, thus reducing the transmitter generated
intermodulation. The circulator load dissipates reflected power. It includes a cable that connects to
the RF Peripherals port on the base station/repeater backplane interface board to provide
temperature monitoring in identifying antenna problems.
Figure 9-4 External Dual Circulator Tray (UHF)
Figure 9-5 External Dual Circulator Tray (800 MHz)
Note
The functionality of RF Peripherals port (temperature monitoring) is not supported.
RF Output
RF Peripherals
Port
Low Pass Filter
RF Input
Circulator Load
External Dual
Circulator
RF Output
RF Peripherals Port
RF Input
Circulator Load
External Dual Circulator
Low Pass Filter
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