T X 3 5 5 0 S
I N S T R U C T I O N M A N UA L
PA G E 1 3
SILENT SQUELCH TAIL
The Squelch Tail is the short burst of noise that is heard in
the speaker at the end of a transmission just before the
Squelch closes.
To some it is a reassuring confirmation that it is their turn to
transmit but in some applications it may be an annoyance
especially when listening through an earpiece or headphones.
The Silent Squelch Tail function removes this Squelch Tail,
reducing it to a faint click as the Squelch closes.
To enable or disable the Silent Squelch Tail
1. Press and hold
MENU
to enter the menu.
2. Press
MENU
repeatedly until ‘SSTxx’ is displayed where xx
= ON or OF.
3. Press to enable the Silent Squelch Tail. ‘SSTON’ will be
displayed and the Squelch Tail will become silent.
4. Press to disable the Silent Squelch Tail. ‘SSTOF’ will be
displayed and the Squelch Tail will be restored.
When finished, briefly press the
PTT
to exit.
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 increase 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 radio 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
radio 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.
CHA
NNE
L 31
CHA
NNE
L 1
CHA
NNEL
1
CHA
NNEL
31
VEHICLE
SIMPLEX
REPEATER
OPERATION
VEHICLE
REPEATER
STATION
Your radio 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.
