3COM AA12S User Manual
SM69
AA12S Series
Compact Audio Controller
INSTALLATION AND OPERATION MANUAL
REV 4.00 October 13, 2005
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Copyright 2005 by Northern Airborne Technology
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Performed at factory
Periodically NAT will release manual amendments. In order to maintain the most
accurate and up to date manual these amendments should be carried out immediately
upon receipt and recorded on the following amendment record.
AMENDMENT RECORD
Amendment
Number
Amendment
Date
Section(s)
Changed
Date
Entered
Entered By
806-0001 Oct 14/05 1,3
Insert any Amendment Instruction sheets after this page.
Oct 13, 2005 Page ii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
INSTALL_OPS
MANUAL AMENDMENT
Manual: SM69 (AA12S) Amendment #: 1
Document # SM69\Install_Ops\809-0001 Amendment Date: Oct 14, 2005
The purpose of this amendment is to change the Revision of the manual to 4.00 (to
reflect its status as a 2-part manual), and to correct a Direct Audio statement (removed
from Section 3.3.1, added to Section 1.2.1.
NB. This amendment can be performed on both Rev 1.00 OR Rev 4.00 of this manual.
Amendment Instructions:
1
1-1 and 1-2 Rev 1.00 or 4.00 1-1 and 1-2 Rev 4.00 Amendment # 1
3-1 to 3-4 Rev 1.00 or 4.00 3-1 to 3-4 Rev 4.00 Amendment # 1
2 Update the Amendment Record sheet at the front of the manual.
3 Insert this page into the manual after the Amendment Record sheet (page ii).
Manual Amendment ends after the following amended pages
Remove Pages Replace With Pages
Amendment # 1 Oct 14, 2005 Page 1
ENG-FORM: 809-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Table of Contents
Section Title Page
1 Description
1.1 Introduction 1-1
1.2 General Information 1-1
1.2.1 Features 1-1
1.2.2 Installation Adjustments 1-1
1.3 Specifications 1-2
1.3.1 Electrical Specifications 1-2
1.3.2 Physical Specifications 1-4
1.3.3 Environmental Specifications 1-4
1.3.4 Unit Nomenclature 1-5
2 Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3 Installation Procedures 2-1
2.3.1 Warnings 2-1
2.3.2 Cautions 2-2
2.3.3 Notes 2-2
2.3.4 Cabling and Wiring 2-2
2.3.5 Post-Installation Checks 2-2
2.3.6 Adjustments 2-3
2.4 Continued Airworthiness 2-4
2.5 Accessories Required But Not Supplied 2-4
2.6 Installation Drawings 2-5
3 Operation
3.1 Introduction 3-1
3.2 General Information 3-1
3.2.1 Features 3-1
3.2.2 Installation Adjustments 3-1
3.3 Operation Specifics 3-2
3.3.1 Radio Selection 3-2
3.3.2 Intercom 3-3
3.3.3 PILOT ISO / NORM Modes 3-4
3.3.4 Entertainment Audio 3-4
3.3.5 Automatic Fail-safe 3-5
Oct 13, 2005 Page iii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Section 1 Description
1.1 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.
1.2 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, co-pilot 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 co-pilot on 3 COM
radios and a PA. Receive audio selections include COM1, COM2, COM3, MKR, NAV,
ADF, and DME.
1.2.1 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.
If required, one or more receiver audio inputs may be configured at the factory prior to
ordering as (an) unswitched Direct Audio input(s). A new part number may be
assigned. Contact NAT Product Support for further information.
1.2.2 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 1-1
ENG-FORM: 800-0107.DOT Amendment # 1 Oct 14, 2005
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA12S Series Compact Audio Controller Manual SM69 Rev. 4.00
1.3 Specifications
1.3.1 Electrical Specifications
Power Supply
Input voltage 11-30 Vdc operating. Linear regulator with
reverse and over voltage protection.
Internal supply 11 Vdc
Nominal Lighting Voltage 27.5 Vdc @ 200 mA max (AA12S-001)
13.5 Vdc @ 400 mA max (AA12S-004)
Nom. Operating Voltages 27.5 Vdc @ 600 mA max
(one input for both) 13.8 Vdc @ 600 mA max
Maximum Operating 30.3 Vdc
Minimum Operating 11.0 Vdc
Note: The AA12S is not designed to operate under emergency electrical system
conditions for 14 Vdc operation.
Input Signals
Mic:
Quantity 4 (Pilot, Copilot, 2 Passengers)
Rated level 250 mVrms nominal (125 to 500 mVrms)
Impedance 150 Ohm ±10 %
Circuitry type unbalanced
TX Keyline:
Quantity 2 (Pilot, Copilot)
Rated level ground activates keyline, <20 mA source current
ICS Keyline:
Quantity 4 (Pilot, Copilot, 2 Passengers)
Rated level ground activates keyline, <1 mA source current
Receive Audio:
Quantity 7 (3 COM, 4 NAV)
Rated level 2.5 Vrms nominal (1.3 to 5.0 Vrms)
Impedance 1 kOhm ±10 % (1 to 3 kOhm for sidetone)
Circuitry type unbalanced
Music Inputs:
Quantity 2 (left channel, right channel)
Rated level 1.4 Vrms nominal (850 mVrms to 2.4 Vrms)
Impedance 11 kOhm ±10 %
Circuitry type unbalanced
Page 1-2 Oct 13, 2005
ENG-FORM: 800-0107.DOT Amendment # 1 Oct 14, 2005
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Bidirectional Signals
ICS TIE Channel:
Quantity 1
Rated level 340 mVrms nominal (170 to 680 mVrms)
Impedance 2 kOhm ±10 %
Circuitry type unbalanced
Output Signals
Phones:
Quantity 4 (Pilot, Copilot, 2 Passengers)
Rated level >5.5 Vrms (>100 mW, RX, ICS and music)
>0.7 Vrms (TX sidetone, adjustable)
1.5 Vrms nominal (Pilot ISO mode)
>0.2 Vrms (Automatic failsafe mode)
Impedance 300 Ohm ±10 %
Circuitry type transformer, unbalanced
Mics:
Quantity 4 (COM1, COM2, COM3 and PA)
Rated level 250 mVrms ±10 %
Impedance 150 Ohm nominal
Circuitry type direct throughline via relay
Keylines:
Quantity 4 (COM1, COM2, COM3 and PA)
Rated level <1 A
Circuitry type grounded relay contact
Audio Performance
As per RTCA DO-170 Product Classification 1a except where noted.
* Manufacturers Specification ** Exceeds DO-170 requirement
Rated Output Power (each stereo channel) 100 mW min. into 300 Ω
Audio freq. Response:
Receive ≤3dB down from 350 - 6000 Hz
Intercom ≤3dB down from 350 - 3000 Hz
ICS Tie ≤3dB down from 350 - 3000 Hz
Music ≤3dB down from 300 - 15000 Hz
(Music Bass control at mid setting)
Distortion ≤10%, ≤3 % typical (350 to 6000 Hz)
Input - Input crosstalk -37 dB max*
Input - Output crosstalk -55 dB max
Input - Mic crosstalk <200 µVrms*
Oct 13, 2005 Page 1-3
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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