stabo freecomm 400 II Bedienungsanleitung Seite 27

Transmitting/receiving
Hold the PTT key pressed and speak with normal voice level and a
distance of approx. 5 cm into the microphone, the TX symbol is displayed.
If your message is finished, release the PTT key, the TX symbol is no
longer displayed.
When the radio set is switched on, it is ready-to-receive (unless the
set is transmitting). If the radio set receives a signal, the RX symbol
is displayed.
Adjustable squelch
Your radio set is equipped with an adjustable squelch (3 levels: level 1
= small signal strength, level 3 = large signal strength), that prevents
that an annoying noise can be heard on free radio channels. However,
under certain conditions – and depending on the distance - computers,
electric or electronic devices might interfere with this squelch, so that
you hear noises. Due to the supersensitive receiver of the radio set,
such interferences in immediate proximity are normal and unavoidable.
In case of such interferences you should change the distance to the
source of interference and hold the radio set in such a manner that
the antenna can send freely.
Pilot tone process CTCSS
Your radio set is equipped with two pilot tone process (CTCSS with
38 different tones and DCS with 83 digital codes), that permits to
address specific individual partner stations or groups or to receive only
calls from the latter.
Note: Make sure that you and your partner use the same CTCSS tone
resp. the same DCS code.
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