ATR833A / P/N 833A-(1xx)-(1xx)
Operation and Installation
26
Dokument-Nr.: 01.1411.010.71e / Revision: 2.00
3.4 EXT – External Audio Input’s Behavior
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
rotary knob the following options can be selected:
always on
The external audio input is always on, even during
radio receptions and transmit mode. Use this setting
only for very high priority acoustic warnings, e.g.
collision warning beep tones.
auto off
The external audio input is automatically deactivated
during transmit mode, or when no external audio
activity is sensed.
not RXTX
The external audio input is automatically deactivated
during radio receptions or transmit mode. This
setting does not use the external audio activity
sensing, and therefore can introduce noise when no
signal source is connected.
Use this setting only when auto off does not
react fast enough for very short external audio
signals!
A short press of
switches to the next configuration item, a long press
of
exits the configuration menu.
When deactivating one PTT button and microphone for
transmissions in order to keep passengers from interfering
with ATC communication, don’t forget to reactivate the
copilot’s PTT after end of the flight.
ACT
123.450
SBY
118.910
EXT auto off
