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INSTRUCTION MANUAL
TX4600
NOTE:
If two Open Scan or two Group Scan
groups are available, the radio will display
‘Scan1’ for the original Open Scan and ‘Scan2’
for the original Group Scan.
SELECTING DUPLEX
Duplex operation allows the radio to transmit on
a different frequency to that which is receives.
This allows operation through repeater stations.
Repeaters automatically re-transmit your signal
over a wider area, providing greatly increased
range.
Duplex operation operates only on channels 1 –
8 or 41 – 48. When duplex is selected on these
channels, the radio receives on that channel but
actually transmits 30 channels higher.(See chart
below).
The TX4600 allows you to select Duplex
operation individually on each channel.
To enable or disable Duplex on a channel
1. Select the required channel 1 – 8 or 41 – 48
(the Duplex setting feature is only available on
these channels).
2. Press and hold the
MENU
key until the radio
beeps.
3. Briefly press the
MENU
key twice. ‘dUPON’
(Duplex On) or ‘dUPOF’ (Duplex Off) will be
displayed.
4. Press the or key to select the required
Duplex setting.
5. Press and hold the
MENU
key until the radio
beeps, to store the setting.
CTCSS TONES
CTCSS (Continuous Tone Coded Squelch System)
is a squelch quieting system that allows several
groups of users to share the same channel
without disturbing each other. It uses one of a set
of sub-audible (very low frequency) tones to open
and close the squelch on your radio.
There are two standard tones sets, one
comprising 50 tones and the other comprising 38
tones. Both tone sets are included in the TX4600
to provide compatibility with other radio system.
To toggle the required tone set
1. Switch the radio OFF.
2. Press and hold the
SQL
key while switching
the radio on again.
3. ‘CTC50’ or ‘CTC38’ will be displayed
indicating which tone set is selected.
NOTE:
When switching up from CTC38 to
CTC50, the radio will retain the selected CTCSS
tone frequency and automatically update the
tone set number to reflect its new position in
the CTC50 tone set table. eg. If CTCSS tone
frequency 233.6 Hz (CTC38 tone set #36) was
selected, the radio will then display equivalent
CTC50 tone set #47. When switching down from
CTC50 to CTC38, if there is no equivalent CTC38
frequency, the CTCSS tone will be set to ‘oF’
(0 Hz). You will need to reselect a new tone.
Channel Selected
1
2
3
4
5*
6
7
8
41
42 43
44
45
46
47
48
Receive Channel
1
2
3
4
5*
6
7
8
41
42 43
44
45
46
47
48
Transmit Channel
31
32
33
34
35*
36
37
38
71
72 73
74
75
76
77
78
* Emergency Channel only
Simplex/Duplex Range Comparison
Vechicle
Vechicle
Channel 31
Channel 1
Repeater
Station
Simplex
Repeater
operation
Channel 1
Channel 31
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