Nat AA12 Instrucciones de funcionamiento
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM21
AA12
Compact Audio Controller
INSTALLATION AND OPERATION MANUAL
REV 4.10 September 9, 2004
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Copyright 2004 by Northern Airborne Technology
SM21 Rev.4.10 Compact Audio Controller Manual
Sep 09,2004 Page ii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Periodically NAT will release manual amendments. In order to maintain the most
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SM21 Rev.4.10 Compact Audio Controller Manual
Sep 09,2004 Page iii
ENG-FORM: 820-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Table of Contents
Section Title Page
1 Description
1.1 Introduction 1-1
1.2 Purpose of Equipment 1-1
1.3 Features 1-1
1.4 Specifications 1-2
1.4.1 Electrical Specifications 1-2
1.4.2 Physical Specifications 1-3
1.4.3 Environmental Specifications 1-3
1.5 Unit Nomenclature 1-4
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 Mechanical Mounting 2-3
2.3.6 Post-Installation Checks 2-3
2.3.7 Adjustments 2-4
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 3-1
3.3 Radio Selection 3-1
3.3.1 Receive Audio – AA12-001 3-1
3.3.2 Receive Audio – AA12-002/AA12T-002 3-2
3.3.3 Transmit Selection 3-2
3.4 Intercom 3-3
3.5 Entertainment Audio 3-3
3.6 Pilot Isolate/Emergency Operation 3-4
3.6.1 Pilot Isolate 3-4
3.6.2 Emergency operation 3-4
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.
AA12 Compact Audio Controller Manual SM21 Rev. 4.10
The AA12 features NAT's ICS TIE LINE, allowing it to be connected to any other NAT
audio product with the same feature, and a MUSIC input, with the music muted by TX,
RX or ICS activity.
Internal control is provided for radio receive level, artificial transmit sidetone level, music
level, and ATC mute level. Intercom level and VOX squelch are adjustable from the
front panel.
ICS operation allows transmit during any ICS mode simply by use of any TX PTT
switch.
The different models of the unit permit variations of the front panel labeling of the
inputs/outputs, and the option of either Dzus or tray mounting.
1.4 Specifications
1.4.1 Electrical Specifications
Input Power: 14 or 28 Vdc nominal
Supply Current: 250 mA (max)
Lighting Current: 60 mA @ 28 Vdc typical
120 mA @ 14 Vdc typical
Headset Power: 60 mW typical/150 Ω Headset
Total output power 320 mW typical.
Indicators: Bi-color LED: Green = Transmit
Orange = Intercom
Controls: Front panel: ICS Volume
VOX Threshold
ISO/NORM Mode Select
RX Audio Select
TX Select
Internal: ATC Muting
Sidetone (Artificial)
RX Volume
Music Level
Page 1-2 Sep 9, 2004
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM21 Rev. 4.10 AA12 Compact Audio Controller Manual
Inputs: 6 Standard HI Z MICs
(250 mVrms for full output)
1 Music (3 Vp-p, 600 Ωinput Z)
7 Radio (2.5 Vrms, 1 kΩinput Z)
1 ICS Key (ground seeking)
1 ICS Tie Line (ICS expansion)
2 TX Keys (ground seeking)
1 Direct Audio
Outputs: 6 HI Z Headsets (150–600 Ω)
4 Transmitter MIC/Key/Lo
1.4.2 Physical Specifications
Height: 1.1” (28.5 mm)
Length: 5.8” (146.1 mm) behind panel
Width: 5.8” (146.1 mm) in front of panel
4.9” (124.5 mm) behind panel
Weight: 1.0 lb (450 g)
Mounting: AA12 - Panel mount, Dzus fasteners (4)
AA12T - Tray Mount
1.4.3 Environmental Specifications
Operating Temperature: -40 °C to +70 °C
Storage Temperature: -55 °C to +85 °C
Altitude: 25,000’
Humidity: 95% Non-condensing
Sep 9, 2004 Page 1-3
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA12 Compact Audio Controller Manual SM21 Rev. 4.10
1.5 Unit Nomenclature
The models covered by this manual are the base units from which all other models are
derived. For details of other available models, please contact NAT.
Model Description
AA12-001 COM1, COM2, COM3 Transceivers + PA
NAV, ADF and DME/MKR switches
28 Vdc Blue-white lights
Supports standard NAT ICS Tie Line
ICS Volume and VOX Squelch controls
Dzus mount
AA12-002 COM1, COM2, COM3 Transceivers + PA
4 unswitched inputs
28 Vdc Blue-white lights
Supports standard NAT ICS Tie Line
ICS Volume and VOX Squelch controls
Dzus mount
AA12T-002 COM, FM, AUX Transceivers + PA
28 Vdc Blue-white lights
Supports standard NAT ICS Tie Line
ICS Volume and VOX Squelch controls
Tray mount
End of section 1
Page 1-4 Sep 9, 2004
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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