Repeaters; Simplex/Duplex Range Comparison - GME GA9800 Instruction Manual

REPEATERS

A repeater system consists of a linked transmitter/receiver combination installed in a prominent
location. The repeater is designed to receive signals on a designated channel and re-transmit
them on another channel.
Repeaters are usually located on hills, mountains or tall buildings. The increased elevation
greatly improves the range of the repeater beyond that of a normal base or mobile. This means
that the repeaters are able to receive and retransmit signals to radios that would otherwise be
out of range of each other.
Normally, UHF transceivers transmit and receive on the same channel. This is known as
SIMPLEX operation. However, to communicate through repeaters, your transceiver must be
able to transmit and receive on different channels (known as DUPLEX). Your TX6200 has a
Duplex key to allow you to operate through repeaters.
The Duplex function only operates on channels 1 - 8, as these are the channels that have been
designated for repeater use. When Duplex mode is selected, your TX6200 receives on the
selected channel (e.g. channel 1) but automatically transmits 30 channels higher (i.e. channel
31). The UHF repeater receives your signal on Channel 31 and retransmits it on channel 1 for
others to hear.

SIMPLEX/DUPLEX RANGE COMPARISON

Page 40 User Instructions TX6200