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Controls and indicators Description Function
Store button Pushbutton Briefly pressing the STORE
button causes the display
frequency to be stored in one of
the four memory locations,
provided that the channel
selector switch is not in position
A, but set to one of the four
memory positions (1 - 4). In
models with serial no. of 4000 or
above the STORE button must
be held depressed for approx. 2
seconds in order for the
displayed channel frequency to
be written into the selected
memory location.
3.2 Operating instructions for serial no. 0 to serial no. 3999
NOTE
Switch off transceiver when engines are started or stopped.
1. Switch on VHF transceiver with ON/OFF switch. For a few seconds the LC display reads 188.88
(display test). The transceiver then automatically switches to 121.500 MHz (emergency frequency)
when the channel selector is in position A. When it is positioned to one of the stored channel
frequencies (switch position 1-4) the display reads the stored channel frequency. To select a
channel frequency other than the stored channel frequencies, position channel selector to A and
then set the desired frequency by means of the MHz and kHz frequency selector switches.
2. Set to frequency of local ground station and position VOL control to center position.
3. Operate PTT key and call ground station. For optimum intelligibility keep microphone almost
touching lips.
4. On response from the ground station adjust for desired volume using VOL control.
5. Position ON/OFF switch to SQL to suppress weak input signals and input noise.
6. The sidetone volume can be adapted to the noise level of the aircraft by means of the sidetone
volume control.
3.3 Operating instructions serial no. 4000 upwards
NOTE
Switch off transceiver when engines are started or stopped.
1. Use the ON/OFF switch to turn on the VHF transceiver. For a few seconds, the digits 188.88 will
appear in the LCD (display test), as well as an arrow to indicate transmission mode. Afterwards
the VHF transmitter automatically switches to the most recently set frequency, if the channel
AR 3201 - ( )
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