Northern Airborne Technology AA83-001 User Manual rev.4.00

SM09-2A

AA83-001
InterMUSIC™ Stereo Intercom System
Serial No. 2939 and later

INSTALLATION AND OPERATION MANUAL

REV 4.00 February 8, 2006

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Copyright 2006 by Northern Airborne Technology

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 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.

AMENDMENT RECORD

Amendment

Number

Note: Revision 4.00 is the first public release of this document

Amendment

Date

Section(s)

Changed

Date

Entered

Entered By

Insert any Amendment Instruction sheets after this page.

Feb 8, 2006 Page ii

ENG-FORM: 820-0110.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 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 1-4

1.4.3 Environmental Specifications 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 Cabling and Wiring 2-2

2.3.4 Adjustments 2-3

2.3.5 Mechanical Installation 2-3

2.3.6 Post-Installation Checks 2-5

2.4 Continued Airworthiness 2-6

2.5 Accessories Supplied 2-7

2.6 Installation Drawings 2-7

3 Operation

3.1 Introduction 3-1

3.2 General Operation 3-1

3.2.1 Stereo & Intercom Special Features 3-1

3.2.2 Communication Functions 3-1

3.2.3 Important Operating Considerations 3-2

3.2.4 Installation Adjustments 3-2

3.3 Controls and Indicators 3-2

3.3.1 ICS VOL/PILOT VOX 3-2

3.3.2 MUSIC VOL/COPILOT VOX 3-3

3.3.3 VOX Operation 3-3

Feb 8, 2006 Page iii

ENG-FORM: 820-0110.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual

Section Title Page

3.3.4 Annunciator 3-3

3.3.5 MODE Control 3-4

3.3.6 Radio Functions 3-5

3.3.7 Muting Logic 3-5

3.3.8 Automatic Fail-safe 3-6

Feb 8, 2006 Page iv

ENG-FORM: 820-0110.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual

Section 1 Description

1.1 Introduction

This manual contains information on the AA83-001 InterMUSIC™ Stereo Intercom
System serial numbers 2939 and later. 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, providing full intercom
capabilities for pilot, copilot and two passengers (PAX). The AA83-001 has a built-in
tieline with tie/split capability, providing support for additional users in a multi-unit
system.

The AA83-001 also provides transmit capability for pilot and co-pilot to a single COM
radio or audio selector panel. The AA83-001 accepts stereo music inputs from either
portable or fixed entertainment systems to produce high quality stereo headset output.

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 AA83-001 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 co­pilot, and provides ICS and radio monitor operation for two additional passengers. Pilot
priority on transmit and pilot isolation/fail-safe (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.

Feb 8, 2006 Page 1-1

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00

1.4 Specifications

1.4.1 Electrical Specifications

Input Power Linear regulator with over voltage protection

Operating Voltages:
Nominal 27.5 or 13.8 Vdc @ 550 mA max (one input for both)
Maximum 30.3 Vdc
Minimum 11.0 Vdc

Internal supply 11 Vdc

Input Signals

Microphone
Quantity 4 (Pilot, Co-pilot, 2 Passengers).
Rated level 250 mVrms nominal (125 to 500 mVrms)
Impedance 150 Ohm ±10 %
Circuitry type unbalanced

TX Keyline
Quantity 2 (Pilot, Co-pilot).
Rated level ground activates keyline, <20 mA source current

ICS Keyline
Quantity 4 (Pilot, Co-pilot, 2 Passengers).
Rated level ground activates keyline, <1 mA source current

Receive Audio
Quantity 1
Rated level 2.5 Vrms nominal (1.3 to 5.0 Vrms)
Impedance 1.2 kOhm ±20 %
Circuitry type unbalanced

Music Inputs
Quantity 2 (left channel, right channel)
Rated level 1.4 Vrms nominal (850 mVrms to 2.4 Vrms)
Impedance 12.5 kOhm ±10 %
Circuitry type unbalanced

Bidirectional Signals

ICS TIE Channel
Quantity 1
Rated level 340 mVrms nominal (170 to 680 mVrms)
Impedance 2 kOhm ±10 %
Circuitry type unbalanced

Page 1-2 Feb 8, 2006

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual

Output Signals

Phones
Quantity 4 (Pilot, Co-pilot, 2 Passengers)
Rated level >5.5 Vrms (>100 mW, RX and ICS and music)
Impedance 300 Ohm ±10 %
Circuitry type transformer, unbalanced

Radio TX Mic
Quantity 1
Rated level 250 mVrms ±10 %
Impedance 150 Ohm nominal
Circuitry type direct throughline via relay

Radio TX Keyline
Quantity 1
Rated level <1 A
Circuitry type grounded relay contact

Audio Performance

Per RTCA DO-170 except where noted. Product Classification: 1a

Rated Output Power 100 mW min. into 300 Ω (each stereo channel)
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 -50 dB max*
Input - Output crosstalk -55 dB max.
Input - Mic crosstalk <1.0 mVrms*
Audio noise -50 dB max
Output Regulation ≤3 dB variance (350 to 6000 Hz)
Audio Communication Loud & Clear
ICS Volume control ≥35 dB*, 40 dB nominal
Music Volume control ≥35 dB*, 40 dB nominal
Amplifiers with Compression N/A
Stability and Short Circuit Protection
No spurious or sustained oscillations.
Receive Input impedance 1.2 kΩ ±20%
Mic Input impedance 150 Ω ±10%
Music Input impedance 12.5 kΩ ±10 %
Tie Line 2 kΩ ±10 %

Note: * Denotes manufacturer's specification

Feb 8, 2006 Page 1-3

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00

Miscellaneous Audio Performance

ICS BAL control: ≥20 dB dynamic range
MUS BAL control: ≥20 dB dynamic range
RX BAL control: ≥20 dB dynamic range
ICS BASS control: ±2.5 dB min. range at 350 Hz*
MUS BASS control: ±2.5 dB min. range at 350 Hz*
MUS MUTE control: -60 dB to –10 dB
Music attack/decay time: < 7 seconds
RX volume control: ≥35 dB dynamic range
* measured at –10 dB ref: rated input level.

1.4.2 Physical Specifications

Height 1.32" (33.5 mm) max

Depth 7.20" (182.9 mm) max

5.84" (148.3 mm) max behind panel

Width 2.62" (66.5 mm) max panel width

Weight 0.70 lbs (0.32 kg) max

Mounting Through front panel; three 6-32 black brass

screws. Aircraft panel thickness 0.050" to 0.125"

Faceplate Panel is a rectangular double-sided photo-

imaged 0.062" aluminum plate, 1.32" high x

2.62" wide, max

Material/Finish Chassis and Cover: Brushed aluminum with

chromate conversion

Connectors One 44 pin male high-density D-min connector

with jackposts

Installation Kit AA83-IKC

1.4.3 Environmental Specifications

Temperature -20o to +55o C

Altitude 50,000 ft

Shock 6g/11ms, 20g/11ms, 20g/3s sustained.

Qualification:
DO-160D Env. Cat. [(A1)(D1)X]BXB[(SMB)(UF)]XXXXXXZBAXXXMXXXX
Safety of Flight requirements per RTCA DO-160D Environmental Conditions.

End of section 1

Page 1-4 Feb 8, 2006

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual

Section 2 Installation

2.1 Introduction

Information in this section consists of unpacking and inspection procedures, installation
procedures, post-installation checks, and installation drawings for the AA83-001

InterMUSIC

2.2 Unpacking and Inspection

Unpack the equipment carefully and locate the warranty card. Inspect the unit visually
for damage due to shipping and report all such claims immediately to the carrier
involved. Note that each unit should have the following:

Verify that all items are present before proceeding and report any shortage immediately
to your supplier.

2.2.1 Warranty

™

Stereo Intercom, serial numbers 2939 and later.

- AA83-001 InterMUSIC™ Stereo Intercom

- Installation kit (see section 2.5)

- Warranty Card

- Operator’s Manual

- Release certification

Complete the warranty card information and send it to NAT when the installation is
complete. If you fail to complete the warranty card, the warranty will be activated on
date of shipment from NAT.

Note: An appropriately rated facility, e.g. Certified Aircraft Repair Station, must install

this equipment in accordance with applicable regulations. NAT Ltd’s warranty is
not valid unless the equipment is installed by an authorized NAT Dealer. Failure
to follow any of the installation instructions, or installation by a non-certified
individual or agency will void the warranty, and may result in a non-airworthy
installation.

2.3 Installation Procedures

2.3.1 Warnings

High volume settings can cause hearing damage.

Set the headset volume control to the minimum volume

setting prior to conducting audio tests, and slowly increase

the headset volume to a comfortable listening level.

Feb 8, 2006 Page 2-1

ENG-FORM: 805-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.