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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. This may result in eventual unit failure, which
IS NOT COVERED BY WARRANTY. Use

only stereo headsets

with this system, and

be sure the aircraft is placarded appropriately.

3.2.4

Installation Adjustments

Using individual level trimpots, an approved dealer can adjust the following audio levels
during service, or at the time of installation.

•

Music mute level

RX Balance

ICS Balance

Music Bass level

RX volume level

ICS Bass level

Music balance

3.3

Controls and Indicators

Dual Control:
ICS Volume (inner)
Pilot VOX (outer)

Dual Control:
Music Volume (inner)
Copilot VOX (outer)

MODE Switch

Annunciator

3.3.1

ICS VOL/PILOT VOX

This control is a fluted concentric rubber knob on the left side of
the front panel.

The inner (front) knob is the

ICS VOL

control, which is used to

set

Intercom volume. It is at minimum volume when fully

counter-

clockwise (ccw). As the knob is rotated clockwise(cw), the ICS
volume for crew and PAX increases. The ICS is muted during
transmit operations.

The outer (rear) knob is the

PILOT

VOX

control, that controls VOX for the pilot only.

For full information on VOX operation, see section 3.3.3 below.

Page 3-2

Feb 8, 2006

ENG-FORM: 806-0106.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

Содержание InterMUSIC AA83-001

Страница 1: ...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 r...

Страница 2: ...ed for or approved by Cobham without evidence that the Federal Aviation Administration or other regulatory agency has determined that the data in this document is valid for such use This document shall not be used for the development manufacture service support modify overhaul or obtain FAA or any other regulatory approval of any other products than are specified within Cobham assumes no liability...

Страница 3: ...erMUSIC 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 ...

Страница 4: ...e 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 Note Revision 4 00 is the first public release of this document Insert any Amendment Instruction sheets after this pa...

Страница 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 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...

Страница 6: ...em Manual Feb 8 2006 Page iv ENG FORM 820 0110 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD 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 ...

Страница 7: ...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 i...

Страница 8: ... 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 Impe...

Страница 9: ...00 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...

Страница 10: ...ght 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 I...

Страница 11: ...ur supplier 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 NAT Ltd s warranty is not valid un...

Страница 12: ...e types should be to MIL W 22759 as specified in AC43 13 1B Change 1 Paragraphs 11 85 11 86 and listed in Table 11 11 For shielded wire applications use Tefzel MIL C 27500 shielded wire with solder sleeves for shield terminations to make the most compact and easily terminated interconnect Follow the wiring diagrams in Section 2 6 as required Allow 3 inches from the end of the wire to the shield te...

Страница 13: ...ometers are used to adjust the headset stereo balance 2 3 4 2 ICS and MUSIC BASS These potentiometers are used to adjust the amount of bass audio to the headsets Rotating ccw will lower the bass level and cw will raise it 2 3 4 3 RX VOL To reduce the receive audio volume rotate this potentiometer ccw and to increase the volume rotate it cw 2 3 4 4 MUSIC MUTE The music mute level can be adjusted us...

Страница 14: ...ure that the aircraft panel is tightly sandwiched between the AA83 001 and faceplate c Rotate the inner and outer shafts of the ICS VOL VOX potentiometer fully ccw The outer knob may be rotated by hand but it may be necessary to temporarily attach the inner ICS knob to facilitate this action Align the white markers on the knobs part of 40 21 ICS3 to the LIVE position on the faceplate label Using a...

Страница 15: ... d Check all mic phone music and key lines for shorts to ground or adjacent pins Check all key lines for correct operation 2 3 6 2 Power On checks WARNING 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 Install the AA83 001 and power up ...

Страница 16: ... position and then pull the breaker or fuse that powers the AA83 001 The pilot s headset is now connected directly to the COM or audio panel and should be checked to ensure the RX and TX functions work properly It may be necessary to adjust the RX VOL side trimpot to ensure RX audio from the audio panel is at a suitable level for audibility Be sure headsets are of good quality and are installed co...

Страница 17: ...d Template AA83 43 10 083 1 Faceplate Rectangular AA83 001 50 04 831 2 6 Installation Drawings DRAWING REV DESCRIPTION TYPE SERIAL AA83 001 302 0 1 00 Stereo Intercom Block Diagram 2939 and up AA83 001 403 0 2 00 Stereo Intercom Interconnect 2939 and up AA83 001 405 0 2 00 Stereo Intercom Connector Map 2939 and up AA83 001 905 0 2 00 Stereo Intercom Faceplate 2939 and up AA83 001 920 0 2 00 Stereo...

Страница 18: ...Confidential and Proprietary to NAT ...

Страница 19: ......

Страница 20: ......

Страница 21: ......

Страница 22: ......

Страница 23: ...Confidential and Proprietary to NAT ...

Страница 24: ......

Страница 25: ...her NAT systems including AA82 AMS4x and AA9x series units 3 2 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 an...

Страница 26: ...t the time of installation Music mute level RX Balance ICS Balance Music Bass level RX volume level ICS Bass level Music balance 3 3 Controls and Indicators Dual Control ICS Volume inner Pilot VOX outer Dual Control Music Volume inner Copilot VOX outer MODE Switch Annunciator 3 3 1 ICS VOL PILOT VOX This control is a fluted concentric rubber knob on the left side of the front panel The inner front...

Страница 27: ...l mics will be live and any sound picked up will be processed by the ICS system hot mic KEYED ICS When the VOX control is positioned fully cw to the MAX position the intercom will be in a keyed only mode VOX ICS When the VOX control is positioned between fully cw and fully ccw the intercom is in VOX mode To establish the VOX threshold rotate the control ccw until the LED turns red and then rotate ...

Страница 28: ...tion the pilot copilot and passengers hear the same signals from the aircraft communication system Sometimes this is not desirable from the pilot s perspective for instance during communication with the tower on approach or when discussions on the intercom would be a distraction Many times the copilot position is simply another passenger and the pilot may wish to be isolated from them PILOT ISO mo...

Страница 29: ...ach other listen to music and hear all radio communications There is provision for an external ICS tie line load to maintain the ICS audio at the same level as in NORM mode 3 3 6 Radio Functions There are two PTT inputs one each for the pilot and copilot Activation of either PTT input connects the user s MIC to the radio and activates the output PTT to the radio Sidetone audio input is provided fr...

Страница 30: ...A83 001 circuit breaker Fail safe mode routes the pilot s phones mic audio and mic PTT directly to the COM radio During transmit mode the pilot mic is directly connected to the transceiver mic Mic bias is provided by the transceiver not the AA83 001 The pilot TX keyline is directly connected to the transceiver The sidetone audio is directly connected from the audio source to the pilot phones Durin...

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