Nat InterMUSIC AA83-001 Installation And Operation Manual
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Nat InterMUSIC AA83-001 Installation And Operation Manual

Stereo intercom system
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SPECIAL NOTICE
Ownership of this product has been transferred to Cobham Aerospace Communication
from Anodyne Electronics Manufacturing (AEM) and Northern Airborne Technology
(NAT). Cobham is responsible for all matters related to this product, including sales,
support and repair services.
Please note the transition to convert product manuals and supporting documentation is
an ongoing process and is being addressed on an 'as needed' basis.
All references to AEM and NAT product part numbers (and associated images) are
equivalent to Cobham product part numbers.
Contact info:
Cobham Aerospace Communication,
6400 Wilkinson Drive, Prescott, Arizona, 86301.
Telephone: (928) 756-1615 or refer to the following website:
www.wulfsberg.com
for more information.

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  • Page 1 Ownership of this product has been transferred to Cobham Aerospace Communication from Anodyne Electronics Manufacturing (AEM) and Northern Airborne Technology (NAT). Cobham is responsible for all matters related to this product, including sales, support and repair services. Please note the transition to convert product manuals and supporting documentation is an ongoing process and is being addressed on an ‘as needed’...

  • Page 2: Proprietary Notice

    PROPRIETARY NOTICE PROPRIETARY STATEMENT This document contains confidential and proprietary information and is the property of Chelton Avionics, Inc., a subsidiary of Cobham plc. It is to be provided in confidence on the condition that by receipt it is not reproduced or copied in whole or in part, or used to furnish such information to others, or to make use of it for purposes other than specified by the Usage Statement.
  • Page 3 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 (250) 763-2232 Facsimile (250) 762-3374 Copyright 2006 by Northern Airborne Technology CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
  • Page 4 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.

  • Page 5: Table Of Contents

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual Table of Contents Section Title Page Description Introduction Purpose of Equipment Features 1.3.1 Stereo & Intercom Special Features 1.3.2 Communication Functions Specifications 1.4.1 Electrical Specifications 1.4.2 Physical Specifications 1.4.3 Environmental Specifications Installation Introduction Unpacking and Inspection...
  • Page 6 SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual Section Title Page 3.3.4 Annunciator 3.3.5 MODE Control 3.3.6 Radio Functions 3.3.7 Muting Logic 3.3.8 Automatic Fail-safe Feb 8, 2006 Page iv ENG-FORM: 820-0110.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

  • Page 7: 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. 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).

  • Page 8: Specifications

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 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...
  • Page 9 SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual Output Signals Phones Quantity 4 (Pilot, Co-pilot, 2 Passengers) >5.5 Vrms (>100 mW, RX and ICS and music) Rated level 300 Ohm ±10 % Impedance Circuitry type transformer, unbalanced Radio TX Mic Quantity 250 mVrms ±10 % Rated level...

  • Page 10: Physical Specifications

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 Miscellaneous Audio Performance ≥20 dB dynamic range ICS BAL control: ≥20 dB dynamic range MUS BAL control: ≥20 dB dynamic range RX BAL control: ±2.5 dB min. range at 350 Hz* ICS BASS control: ±2.5 dB min.

  • Page 11: Introduction

    2.2.1 Warranty 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.

  • Page 12: Cautions

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 2.3.2 Cautions Do not bundle any lines from this unit with transmitter coax lines. Do not bundle any logic, audio, or DC power lines from this unit with 400 Hz synchro wiring or AC power lines.

  • Page 13: Adjustments

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual 2.3.4 Adjustments The unit ships from the factory with all internal adjustments set to the normal test levels. Once installed in the aircraft, it may be desirable to change some of these settings to best suit the local operating environment.
  • Page 14 AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 The AA83-001 can be installed in a vertical or horizontal attitude directly on the instrument console, using the AA83- IKC Installation kit (see Section 2.5 for details). For proper installation, refer to Mounting Diagram (AA83\001\920-0) and Drill Template (AA83\001\921-0) and the following steps: Note: The mounting nuts on the panel pots should not be removed at any time.

  • Page 15: Post-Installation Checks

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual 2.3.6 Post-Installation Checks If any preset requires adjustment, be sure this is carried out before the aircraft leaves, and that the unit and its mating connector are secured before departure. Make all required log book entries, electrical load, weight and balance amendments and other paperwork as required by your local regulatory agency.

  • Page 16: Continued Airworthiness

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 Note: Unusual buzzes, hums or other background audio may be symptomatic of multiple grounds or noisy external systems sharing the same wire bundle. Incorrect jack wiring is a common fault, especially for passenger stations, and may cause loss of audio, a tone on the headset lines, or other problems.

  • Page 17: Accessories Supplied

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual Accessories Supplied Installation kit p/n AA83-IKC is required to complete the installation. The kit consists of the following: Quantity Description NAT Part # D-sub Socket 20-20-044 Contacts 20-26-703 Jackscrew, D-sub, Pair 20-27-002...
  • Page 18 Confidential and Proprietary to NAT...
  • Page 23 Confidential and Proprietary to NAT...

  • Page 25: Introduction

    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.

  • Page 26: Important Operating Considerations

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 3.2.3 Important Operating Considerations Ensure headsets are of good quality and are installed correctly. NEVER USE MONO AIRCRAFT HEADSETS in this system unless the installation has been specifically wired for mono operation, as they will short out one side of the AA83-001 power amplifier when installed in stereo jacks.

  • Page 27: Music Vol/Copilot Vox

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual 3.3.2 MUSIC VOL/COPILOT VOX This control is a fluted concentric rubber knob on the right side of the front panel. The inner (front) knob is the MUSIC VOL control, which is used to set normal music volume.

  • Page 28: Mode Control

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 3.3.5 MODE Control MODE Switch The mode control is a three-position toggle switch used to select the operational mode of the unit. The selectable positions are SPLIT, PIL ISO and NORMAL. These modes are described fully in sections 3.3.5.1, 3.3.5.2 and 3.3.5.3 below.

  • Page 29: Radio Functions

    SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual The copilot and passengers will be unable to monitor any transceiver activity, although they retain full ICS and music functions. This mode is 'fail-passive', meaning that it requires no power to operate and is the same mode the box goes into automatically when power is lost to the AA83-001.

  • Page 30: Automatic Fail-Safe

    AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00 Below is a simple chart to aid in understanding audio switching in the NORMAL Operation mode. The following terms are used: 'Active' - Function being used. 'Muted' - Functions that are overridden by the active condition. 'Idle' - Functions that are not active, but still available for use.

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