Northern Airborne Technology AA12 - Manual (Page 7)

SM21 Rev. 4.10 AA12 Compact Audio Controller Manual
Section 1 Description
1.1 Introduction
This manual contains information on the AA12 Compact Audio Controller. All derivative
products will be covered by manual supplements, which can be obtained from NAT as
required.
Information in this section consists of purpose of equipment, features and specifications.
1.2 Purpose of Equipment
The AA12 is a compact audio controller that provides full boom microphone (MIC)
support and high performance audio for up to six crew positions with VOX, LIVE and
KEYED ICS capability. Boom MIC control is provided for pilot and copilot transmit
capability, with the pilot retaining priority. Muting of the entertainment and/or intercom
audio is accomplished during the various operational modes, providing improved
intelligibility of the audio delivered to the user.
The very small size and extensive radio and intercom functions make this an excellent
choice for many installations. The AA12 is intended for use in situations where radio
selection, audio performance and size are all critical elements.
The audio characteristics of the AA12 are derived directly from the AA80 family, and the
AA12 delivers the same reliable performance. The compact ‘radio select’ functions
provide all the necessary capability for most general aviation and light commercial
operations, with up to four transceivers and four receivers (depending on model).
1.3 Features
The AA12 system employs NAT's unique audio processing, which reduces noise and
tailors the frequency response to produce clean, crisp audio under difficult conditions. This
results in better on-board communication and greatly reduced noise fatigue for the pilot.
Two crew positions have full TX/RX/ICS capability and four are RX/ICS only. PILOT
ISO operation is provided, along with fail passive switching for the Pilot. Front panel
annunciation provides indication of TX and ICS operations. A fully illuminated front
panel is provided for low light operations.
Over voltage and reverse voltage protection circuits ensure operability in severe aircraft
environments.
Sep 9, 2004 Page 1-1
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.