Manual

T X 3 42 0 I N S TR U C T I ON M AN UAL PAG E 5
to allow the signal to be heard clearly. Alternatively you can
reduce the Squelch sensitivity as described as follows.
SQUELCH SENSITIVITY
The sensitivity of the Squelch to incoming signals can
be set to suit your operating environment. For example,
excessively noisy environments may cause the squelch
to open on local noise. The TX3420 has nine (9) preset
Squelch sensitivity settings that can be selected using the
MENU function.
To adjust the pre-set Squelch sensitivity
Please refer to the MENU SETTINGS on page 16.
PRIORITY CHANNEL
The Priority Channel feature allows you to store one of
the channels as a Priority Channel that can be instantly
recalled at the press of a key. This can be used to provide
instant access to your working channel or your local
repeater channel.
To store a Priority Channel
1. Select the required channel.
2. Press and hold the PRI key until a high beep is heard.
The selected channel will be stored.
To Recall a Priority Channel
Briefly press the PRI key. The radio will switch straight to
the selected Priority Channel. Any active functions (such
as scanning or Quiet) will be cancelled.
DUPLEX OPERATION
Duplex operation allows the radio to transmit on a different
frequency to which it receives. This allows operation
through local repeater stations. These repeater stations
automatically re-transmit your signal over a wider area,
providing greatly increased range.
Duplex operation is only available on channels 1-8 and
41-48. When duplex is selected on these channels, the
radio receives on that channel but actually transmits 30
channels higher, e.g.
* Emergency Channel only
The TX3420 allows you to pre-select Duplex operation
individually on each channel.
To select Duplex on individual channels
1. Select the required channel 1-8 or 41-48.
2. Briefly press the F key followed by the DUP key. ‘DUP’
will appear on the display accompanied by a high beep.
To remove Duplex from a channel
1. Select the required channel 1-8 or 41-48. ‘DUP’ will be
visible on the display.
2. Briefly press the F key followed by the DUP key.
‘DUP’ will disappear from the display accompanied
by a low beep.
Standard Microphone MC503B
Optional Microphone MC540B
Channel
Up
Channel
Down
Push To
Talk PPT
Priority
Skip / Call
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
Skip / Call
Direct
Channel
Entry
Keypad
Menu/
Enter Key
Clear Key
Down Key
Up Key
Keylock Key
Push to Talk