TX6200 I N S T R U C T I O N M A N U A L PAGE 31
SIMPLEX/DUPLEX RANGE
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 and 41 – 48, 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.
Vechicle
Simplex/Duplex Range Comparison
Simplex
Repeater
operation
Channel 31
Channel 1
Repeater
Station
Channel 1
Channel 31
Vechicle
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