Northern Airborne Technology AA83-001 rev.4.10 - Manual (Page 29)

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
AA83-001 InterMUSIC™ stereo intercom.
3.2 General
The AA83-001 InterMUSIC™ is a stereo intercom system that supports a pilot, copilot
and two passengers. It provides entertainment and communication audio in full stereo
to all four headsets, and transceiver control for both the pilot and copilot. The
InterMUSIC™ family of stereo intercoms allows several installation configurations from
single unit systems, to fully independent stations for the pilot, copilot and passengers.
Tie Line connections are compatible with other NAT systems including AA82, AMS40
and AA95 series units for expanded systems.
3.2.1 Stereo & Intercom Special Features
The stereo music audio is muted during transmit or intercom operation and when radio
receive audio is detected, permitting greater intelligibility of incoming transmissions.
The AA83-001 muting depth adjustment ranges from complete music muting to gentle
background music on command, with a fast attack and slow level return for optimum
user comfort. Each microphone is individually gated, for the best possible noise
performance during VOX operation. A front panel annunciator allows easy visual
setting of the VOX threshold, and also indicates transmit operation.
3.2.2 Communication Functions
The AA83-001 provides full boom-mic transmit and ICS functions for the pilot and co-
pilot, and provides ICS and radio monitor operation for two additional passengers. Pilot
priority on transmit and pilot isolation (direct connection to the aircraft radio system) are
standard features on all NAT intercom systems. The AA83-001 can support PTT ICS
operation for all users, and can be wired to cyclic/yoke switches for both TX and ICS
functions.
The balance adjustment pots permit signals to be shifted in the user's acoustic listening
space so that tower transmissions appear to come from one area, and intercom from
another. This greatly aids in signal recognition and more accurately reproduces a
natural listening environment for the flight crew.
Oct 20, 2004 Page 3-1
ENG-FORM: 806-0106.DOT
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