Northern Airborne Technology AA83-001 User Manual rev.4.10

SM09-2

AA83-001 InterMUSIC™
Stereo Intercom System

INSTALLATION AND OPERATION MANUAL

REV 4.10 October 20, 2004

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Copyright 2004 by Northern Airborne Technology

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual

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.

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Oct 20, 2004 Page ii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual

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

1.3.1 Stereo & Intercom Special Features 1-1

1.3.2 Communication Functions 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

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 Cabling and Wiring 2-2

2.3.4 Installation Notes 2-2

2.3.5 Adjustments 2-3

2.3.6 Setting Music Input Compatibility 2-4

2.3.7 Mechanical Installation 2-4

2.3.8 Post-Installation Checks 2-5

2.3.9 Final Check 2-6

2.4 Continued Airworthiness 2-7

2.5 Accessories Required 2-7

2.6 Installation Drawings 2-7

3 Operation

3.1 Introduction 3-1

3.2 General 3-1

3.2.1 Stereo & Intercom Special Features 3-1

3.2.2 Communication Functions 3-1

3.3 Controls and Indicators 3-2

3.3.1 ICS VOL/VOX 3-2

3.3.2 MUSIC VOL/COPILOT VOX 3-2

Oct 20, 2004 Page iii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual

Section Title Page

3.3.3 Annunciator 3-2

3.3.4 VOX Operation 3-3

3.3.5 Mode Switch 3-3

3.3.6 Automatic Fail-safe 3-4

3.3.7 Muting Explanation 3-5

Oct 20, 2004 Page iv

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™Stereo Intercom System Manual

Section 1 Description

1.1 Introduction

This manual contains information on the AA83-001 InterMUSIC™. 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 AA83-001 is a 4-place stereo voice-activated intercom that provides full intercom
capabilities for the pilot and copilot and two passengers (PAX). It provides
entertainment and communication audio in full stereo to all four headsets, and

transceiver control for both the pilot and co-pilot. The InterMUSIC
intercoms allows several installation configurations - from single unit systems, to fully
independent stations for the pilot, copilot and passengers. For expanded systems, tie
line connections are compatible with other NAT systems including AA80, AA82, AMS4x
and AA9x series units.

™

family of stereo

1.3 Features

1.3.1 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 AA83-100 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.

1.3.2 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 1-1

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AA83-001 InterMUSIC™Stereo Intercom System Manual SM09-2 Rev. 4.10

1.4 Specifications

1.4.1 Electrical Specifications

Input Power: +11 to +32 Vdc. Nominal 14/28 Vdc systems

Supply Current: 0.4 A max. (full output power, all users)

Headset Power: Typical 100 mW into each side each headset
(300 Ω ear element)

4 headsets total
Total maximum power 400 mW per channel

Indicators: Transmit (Green LED)
ICS (Amber LED)

Inputs: 4 microphones 'carbon equivalent'
250 mVrms for full output
150 Ω input impedance

2 TX keylines Active ground, for Pilot & Copilot

4 ICS keylines Active ground, for all users

2 music inputs Compatible, left & right
Configurable for either Walkman™/Discman™

phones compatible (3 Vp-p), or Line Output
compatible (100-500 mV @ 10 kΩ)

1 Aircraft radio input

2.5 Vrms for full output
1 kΩ input impedance

1 bi-directional ICS Tie Line
1 Vp-p for full output

2.2 kΩ input impedance

Outputs: 4 aircraft stereo headsets (300 Ω/side)

Not designed for 8 Ω headsets

1 radio microphone output to aircraft audio

panel

1 TX keyline output (hard ground for TX).

Logic: TX, active ICS, and incoming Receive Audio all

mute the music channel (Muting depth
adjustable)

Fast attack, slow return of music signal

Pilot TX priority

Page 1-2 Oct 20, 2004

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.