Page Date: 19. February 2014
910 - 7
Section 910
NAT AA83-001 Intercom
Pilot´s Operating Handbook US
EXTRA 330LX
The copilot will be unable to monitor any transceiver activity, although he retains full ICS and music
functions.
This mode is ‚fail-passive‘ meaning that it requires no power to operate and is the same mode the
box goes into automatically when power is lost to the AA83-001. In this way, switch over is
immediate for the pilot and there is no possibility of lost communication because of a lack of pilot
action. Note that the pilot’s boom mic is sent directly to the radio in this mode, and only a PTT key
input is needed to transmit.
N O T E
In this mode, the receive/sidetone levels may require adjustment at the audio source.
SPLIT OPERATION
Operation in SPLIT Mode is similar to NORM mode, but if the AA83-001 is connected as part of
a multi-unit system, the SPLIT mode allows external users to be disconnected from the AA83-001
ICS communications without requiring adjustment of the ICS Audio level.
All users are permitted to talk to each other, listen to music, and hear all radio communications.
There is provision for an external ICS tie line load to maintain the ICS audio at the same level as
in NORM mode.
910.7.3
FUNCTIONS
RADIO FUNCTIONS
There are two PTT inputs: one each for the pilot and copilot on the control stick. Activation of either
PTT input connects the user’s MIC to the radio, and activates the output PTT to the radio.
Sidetone audio input is provided from the radio, not by the AA83-001 microphone circuits.
Transmit sideline audio utilizes AA83-001 Radio RX audio and phones driver circuits.
Radio RX/sidetone is a mono signal, but RX balance control may be adjusted to provide spatial
displacement to aid user in quick signal identification.
N O T E
A priority transmission feature allows the pilot to override the copilot.
MUTING LOGIC
When transmitting, any music will be muted quickly, and will slowly return when transmission is
completed. Music will also be muted when ICS or RX functions are active. The degree of muting
is set at the time of installation.
Summary of Contents for 330lx
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