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SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
AA12S Series Compact Audio Controllers.
The information in this manual is applicable to all models unless otherwise specified.
3.2 General Information
The AA12S is a compact Dzus-mounted audio controller with an integral 4-place stereo
voice-activated intercom. It provides intercom capabilities for the pilot, copilot and two
passengers (PAX). The AA12S accepts stereo music inputs from either portable or
fixed entertainment systems to produce high quality stereo headset output.
Radio functions include selectable transmit capability for pilot and copilot on 3 COM
radios and a PA. Receive audio selections include COM1, COM2, COM3, MKR, NAV,
ADF, and DME.
3.2.1 Features
All four mics have individual VOX gating. Each gate may also be activated with the
corresponding ICS keyline.
ICS muting is automatic during radio transmission.
The unit is supplied to suit a standard NAT bidirectional ICS audio TIE line for multi-unit
interface (configuration dependent). The crew and PAX are always connected except in
the case of Pilot ISO mode, when the pilot is disconnected from the ICS tie line.
3.2.2 Installation Adjustments
The following audio levels can be adjusted at the time of installation, or during service
by an approved dealer, using individual level trimpots.
• Music Mute level • Sidetone level
• ICS Bass level • ICS Balance
• RX volume level • RX Balance
• Music Bass level • Music Balance
Oct 13, 2005 Page 3-1
ENG-FORM: 806-0106.DOT Amendment #1 Oct 14, 2005
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.