Becker Avionics
Operating Instructions
Intercom Operation
0638.420-071 Issue 06 02/2021
VHF Transceiver
31
•
The transceiver has two internal intercom circuits.
•
Up to four headsets are connectable.
•
The pilot and co-pilot are connected to the first intercom circuit.
o
When intercom is active, both microphone signals are mixed and
amplified.
o
The signal is audible on both headphone outputs.
o
The internal communication with headsets between both pilots is
possible.
•
The passenger headsets are connected to the second intercom circuit.
•
ALL mode - Everyone connected to the intercom hear all communications.
o
Pilots hear passengers and passengers hear pilots.
•
ISOL mode - Isolated intercoms for the pilots (intercom circuit 1) and the
passengers (intercom circuit 2).
o
This lets pilots communicate with each other and air traffic, while the
passengers are isolated.
o
The passengers on the intercom circuit 2 can hear auxiliary audio (e.g.
from MP3 player) and can communicate with each other.
•
An external ISOL input gives the possibility to change between ALL mode
and ISOL mode.
•
If the PTT1 input is started and ISOL is active the passenger intercom
operation on second intercom circuit is still possible.
•
The intercom operation can be started automatically with
VOX.
•
The VOX threshold is adjustable in the intercom menu.
o
In tandem installations (application with additional
controller) make the adjustments on the primary
controller.
o
In tandem installations with a second intercom circuit
make the adjustments for the second circuit on the
secondary controller.
•
The intercom operation cannot be started if:
o
The speaker is enabled (see "VOX & Speaker Operation"
page 32).
o
The user turned VOX off.
•
The display shows the symbol
if:
o
VOX is off.
o
The speaker is enabled.
118.005
127.000
IC
SQL
118.005
127.000
IC
SQL
