11
The CTCSS (continuous tone coded squelch signal) tones are inaudible low frequency tones
mixed into the microphone signal. On reception the unit checks if the set tone exists and only
enables the speaker after detecting the correct tone.
For channels 1 to 8 the CTCSS codes can be set manually:
•
Press the
MENU
button three times (or until the numbers
00
to
38
flash on the
display).
•
Press
to select the desired CODE.
•
Briefly press the
PTT
button
or simply wait 5 seconds.
Cycle Through Other Menu Items In Sequence
Access all menu items the same way.
•
Press the
MENU
button
once
or
several times
.
•
Each time the setting
flashes
(until now we introduced channel setting, baby mode
parent PMR446 setting and CTCSS setting).
•
Press
to select the desired setting.
•
Briefly press the
PTT
button to confirm – or simply wait a few seconds until
the setting is saved.
Menu Item VOX – Hands-Free Function
This is the sensitivity setting for hands-free operation. The unit detects your voice and
there is no need to press the PTT button. This is very useful if you have no free hand to
press the PTT button; but it can be a problem on a motorbike or in noisy environs. The
hands-free function can respond to noise and your unit transmits without you knowing
and possibly interrupting the channel.
The levels 1 to 4 correspond to the sensitivity like a baby monitor:
OF
normal control with PTT button
(default)
1 high
sensitivity
2 medium
sensitivity
3 low
sensitivity
4
as 1, but with a 10-second talkback interruption after 20 seconds
transmission
Level 4 is also good for radio discipline: if your unit transmits continuously it will be
interrupted after 20 seconds. During this break other parties can answer and point out
your continuous transmission.
