GME TX3500S - Manual (Page 9)

T X 3 5 0 0 S I N S T R U C T I O N M A N UA L PA G E 9
lent squelch tail. ‘oF’ will be displayed and the squelch
tail will be restored.
When finished, press and hold the Channel knob to
return to normal operation.
REPEATERS AND DUPLEX MODE
Duplex operation allows the radio to transmit on a different
frequency to that which it receives. This allows operation
through repeater stations.
A repeater station consists of a linked transmitter/receiver
combination installed in a prominent location. The repeater
is designed to receive signals on a designated channel and
retransmit them on another channel. Repeaters are usually
mounted on hills or tall buildings. The increased elevation
greatly improves both the receiving and transmitting range of
the repeater allowing it to receive and retransmit signals to
radios that would otherwise be out of range of each other.
Normally, UHF radios transmit and receive on the same
frequency - known as Simplex operation. However to
communicate through repeaters, your radio must be able
to transmit and receive on different channels – otherwise
known as Duplex operation. Your TX3500S is fitted with a
Duplex key
to allow you to operate through repeaters.
The Duplex function can only be selected on channels 1-8
and 41-48 as these are the channels that have been
allocated for repeater use. When Duplex is selected, your
TX3500S receives on the selected channel (e.g. CH 1) but
transmits 30 channels higher (CH 31). The repeater hears
your signal on CH 31 and retransmits it on CH 1 for others to
hear.
CHANNEL 31
CHANNEL 1
CHANNEL 1
CHANNEL 31
VEHICLE
SIMPLEX
REPEATER
OPERATION
VEHICLE
REPEATER
STATION
The TX3500S allows you to enable or disable Duplex mode
on individual repeater channels. In this way any repeater
channels that are not being used with repeaters in your area
can be used in Simplex mode for normal direct radio-to-radio
communications.
To enable Duplex on a repeater channel
1. Select the required repeater channel (1–8, 41–48)
2. Briefly press the DUP key. The duplex symbol will
appear on the display accompanied by a high beep.
To remove Duplex from a repeater channel
1. Select the required repeater channel (1-8, 41-48). If
duplex is currently selected, the duplex symbol will
appear.
2. Briefly press the DUP key. The duplex symbol will
disappear from the display accompanied by a low beep.
* Emergency channel only
Channel Selected Receive Channel Transmit Channel
1 1 31
2 2 32
3 3 33
4 4 34
5* 5* 35*
6 6 36
7 7 37
8 8 38
41 41 71
42 42 72
43 43 73
44 44 74
45 45 75
46 46 76
47 47 77
48 48 78
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