AA80 InterVOX Intercom Systems
SM08 Installation and Operation Manual
April 30, 2012 Rev: 5.00 Page 3-1
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
Section 3.0 Operation
3.1 Limitations
The AA80 intercom system imposes no limitation on the original airframe.
3.2 General
The AA80 intercom system provides one central control for all the aircraft audio, allowing existing radio
and entertainment audio to be mixed with live or voice activated intercom audio. Boom microphone
control is also provided for two places (pilot & co-pilot), with pilot priority, and muting of the entertainment
audio is provided during ICS (Intercom) or TX (transmit) operation. An emergency/isolation mode is also
provided for the pilot.
Control over radio receive level (internal), transmit sidetone level (internal), music level (internal),
intercom level (front panel), and VOX threshold (front panel) is provided. The VOX threshold or squelch
also allows for a “live” mode, by defeating the squelch, and allowing continuous ICS operation. Units of
serial number 3000 and higher also feature an ATC muting adjustment (internal).
Operation of the ICS is transparent, allowing transmit during any ICS mode simply by use of the TX PTT
switch.
3.3 Selection of Transmit Functions
Keying the external TX PTT switch activates the AA80 for transmit, with the pilot’s switch having priority in
normal or “INTERVOX” mode. Proper TX operation is annunciated by a green light on the front of the
AA80.
Sidetone is normally heard from the radio(s) connected to the AA80, but if not available, an internal pot
will adjust the level of artificial sidetone generated within the AA80 system for the pilot’s convenience.
Note that this artificial sidetone is only available through the amplifier in the AA80, and will be lost to the
pilot in the “PILOT ISOLATION” mode, and be heard by the passengers.
3.4 Selection of Receive Functions
Receive audio is always enabled through the eAA80, and has a separate internal adjustment to allow
balancing of this level to suit the pilot’s preference, and equalize iso/normal operation.
An additional input is provided for entertainment audio (tape, etc.), with a separate level adjustment. This
line is muted during transmit functions, when the intercom is active, and during reception of radio signals.
IF the “ISO” function is selected, the pilot will be connected directly to the radios, while the co-pilot and
rear passengers remain on the ICS bus with the entertainment audio. In the “INTERVOX” mode, all
stations hear the same audio.
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