ATR833S / P/N 833S-(Cxxx)-(Cxxx)
Operation and Installation
28
Document-Nr.: 01.142.010.71e / Revision:1.03
3.4 DUOWATCH
– Dual-Watch Volume Reduction
By briefly pressing the
SET
button four times, the volume level (“mute”)
for reception on the standby frequency (when having dual watch active)
will be lowered, and can be controlled by the
VOL/SEL
rotary knob. This
allows acoustic distinction between both frequencies.
For further information about the dual watch mode see chapter 2.8.
Range - 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
– Behaviour 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
interfering with ATC communication, don’t forget to reactivate
the co-
pilot’s PTT at the end of the flight.
