T X 3 1 2 0 S
I N S T R U C T I O N M A N UA L
PA G E 2 7
The Busy Channel Lockout function detects
when others outside your CTCSS/DCS group are
transmitting on the channel and prevents your
radio from transmitting over them. If the channel
is busy and you press the
PTT
the radio will emit
a warning beep and the
icon won’t appear.
When you release the
PTT
, look for the icon
on the display as an indicator that the channel is
in use. If the channel is busy, simply wait until the
channel is clear and press the
PTT
again.
NOTE:
You can also press the Monitor key to open
the Squelch and listen for signals on the channel
before transmitting (see Monitor Function directly
below).
To enable Busy Lockout
1. Press and hold the
Channel
control to enter the
menu. The display will show the current Squelch
level setting.
2. Rotate the
Channel
control until ‘BCLxx’ is
displayed (where xx = ‘ON’ or ‘OF’).
•
Rotate the
Channel
control to the right to
enable Busy Channel Lockout. ‘BCLON’ will be
displayed.
•
Rotate the
Channel
control to the left to
disable Busy Lockout. ‘BCLOF’ will be displayed.
When finished press and hold the
Channel
control
to exit the menu.
Monitor Function
When the current channel is in Silent mode, the
icon may appear but no sound will be heard in the
speaker. This indicates that your radio is receiving a
signal that does not match your CTCSS/DCS tone. If
you wish to temporarily monitor the channel, briefly
press the
key. The squelch will open and all
signals will be audible on the channel.
Briefly press the
key again to close the
Squelch and restore the silent mode.
INSTALLATION
The TX3120S is supplied with a slim, U-shaped
mounting bracket. The bracket can be screwed or
bolted in any convenient location in your vehicle
(under or above the dash, on the centre console,
etc.) using the mounting slots provided in the
bracket. The bracket can also be used with the
optional suction mount bracket - Part No: MB043
(supplied with the TX3120SPNP) for mounting to a
windscreen or other smooth surface.
IMPORTANT:
Safety mounting guidelines for the
suction mount bracket can be found on page 4 of
this instruction manual.
Alternatively the radio itself is compact enough to
be fixed directly to a flat surface using Velcro or
double-sided tape.
The TX3120S contains a built-in speaker and
should be installed in a location where the sound
can be heard from the driver’s position. The
microphone also has a built-in speaker which
improves the receiver audio clarity in noisy
environments by bringing the sound closer to you.
Its light weight design allows it to be mounted in
almost any convenient position accessible to the
driver using the mounting clip supplied.
When installing the radio, avoid mounting it
close to heaters or air conditioners. Screw the
microphone’s clip to a firm surface. Fit the
TX3120S into the bracket and tighten the gimbal
knobs. Place the microphone in its mounting clip.
Finally, plug the microphone, power lead and
antenna cable into the sockets provided on the
radio’s rear panel.
