Auxiliary Audio Input (AUX INPUT)
30 VHF Transceiver 0638.420-071 Issue 06 02/2021
• The auxiliary audio input is used for e.g. MP3 player connection.
o This function can be enabled/disabled in the configuration setup*.
• With AUX INPUT enabled:
o The auxiliary audio input signal will be mixed with the received signals
from antenna (passing squelch) and the intercom signal (when started).
o When the intercom operates in isolation mode, the auxiliary audio input
signal is audible on headphone 2 output, also if radio communication
(transmission/receiving) is started.
• The AUX AUTO MUTE function depends on the AUX INPUT.
o This function can be enabled/disabled in the configuration setup*.
o This function automatically mutes the audio signal from the auxiliary
audio input as long as the device detects (based on squelch evaluation)
a RX signal or the user stops the squelch manually.
• With auxiliary input disabled:
o The signal from the auxiliary audio input is permanently audible on the
audio output, independently of the received signal or the squelch status.
• Automatic aux attenuation functionality controls the auxiliary audio input.
o The level of the auxiliary input signal attenuates if intercom is started by
VOX or by /IC discrete input.
o After intercom deactivation, the auxiliary input signal changes to its
value before.
o The attenuation value can be adjusted.
* For details please refer to related manual:
http://www.becker-avionics.com/manuals/
Communication → VHF Transceiver
The intercom operation can be started automatically with VOX (with adjustable
threshold) or externally with an intercom switch.
• If intercom operation is started, the "IC" symbol appears in the
display.
• The intercom volume and the VOX threshold is adjustable in
the intercom menu.
o In tandem configuration (application with additional
controller) on primary controller only.
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