ATR833A-II / P/N 833-II (Axxx)-(Axxx)
Operation and Installation
29
Doc.-No. 01.143A.010.71e / Revision 1.00
3.4 DUOWATCH
– Dual-Watch Volume Reduction
By shortly pressing the
SET
button four times, with help from the
VOL/SEL
rotary knob the lowering of the volum
e level (“mute”) for
receptions on the standby frequency (when having dual watch active)
can be controlled. This allows acoustic distinction between both
frequencies.
For further information about the dual watch mode see 2.8.
ACT RX
123.450
SBY
118.275
DUOWATCH
mute: -1
Wertebereich - 9 - 0
Minus 9 is the strongest reduction, i.e. the dual watch reception is much
quieter.
0 means no reduction, i.e. the dual watch reception is as loud as the
reception on the active frequency.
3.5 EXTAUDIO
– Behavior of External Audio Input
The external audio input can be used to feed a monaural audio signal to
the amplifier for the headsets/speaker.
An external audio signal can be used for different purposes. E.g. it is
possible to check the audio signal of a VOR receiver, to attach a traffic
sensor with acoustic output, or to use the external audio input for
(monaural) music input.
As these signals have different priorities in comparison to radio
receptions, the priority of the external audio input can be configured.
With the
VOL/SEL
rotary knob the following options can be selected:
When deactivating one PTT button and microphone for
transmissions, e.g. in order to keep passengers from
in
terfering with ATC communication, don’t forget to reactivate
the copilot’s PTT after end of the flight.
