Northern Airborne Technology AA224 series Installation And Operation Manual Download Page 13

SM18 Rev. 4.00 

AA24/AA25 Series Single User Audio Controller Manual 

 

Section 2.0 Installation 

2.1 

Introduction     

Information in this section consists of: unpacking and inspection procedures, installation 
procedures, post-installation checks, and installation drawings.  

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: 

 
- AA24-001 or AA25-001 Audio Controller  
- Warranty Card 

 - Operator’s Manual 

- Release certification 
 

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

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.  Do not position this unit next to any device with a strong alternating magnetic field 
such as an inverter, motor or blower, or significant interference to operation will result.   
 
 

Nov 21, 2003 

Page 2-1 

 

ENG-FORM: 805-0105.DOT 
 

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

 

Summary of Contents for AA224 series

Page 1: ...AA25 Series Single User Audio Controller INSTALLATION AND OPERATION MANUAL REV 4 00 November 21 2003 Northern Airborne Technology Ltd 1925 Kirschner Road Kelowna BC Canada V1Y 4N7 Telephone 250 763 2...

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Page 3: ...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 rec...

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Page 5: ...mendment Instructions 1 Remove Pages Replace With Pages 2 5 Rev 4 00 2 5 Rev 4 00 Amendment 1 2 Remove Drawings Section 2 Replace or add Drawings Section 2 AA24 001 405 0 Rev 1 01 AA24 001 405 0 Rev 1...

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Page 7: ...nclature 1 4 2 0 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...

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Page 9: ...nts set default values for direct audio level and artificial side tone 1 3 Features The AA24 AA25 series systems employ NAT s unique audio processing which reduces noise and tailors the frequency resp...

Page 10: ...hone preferred David Clark M1 DC M3 M4 recommended For low Z microphones AA24 801 or AA25 801 are recommended Indicators Transmit green LED VOX ICS triggered by ICS Tie Line red LED Input Signals 4 ai...

Page 11: ...5000 Hz Intercom channel freq response 6 dB from 500 to 3100 Hz Sidetone channel freq response 6 db from 225 to 5000 Hz Direct input freq response 6 db from 275 to 3100 Hz Distortion 2 THD Isolation...

Page 12: ...l Description Distinction AA24 001 COM1 COM2 COM3 COM4 PA NAV ADF DME MKR AUX receive switches 28 Vdc lights and 28 Vdc power high impedance headset and mic ICS RX volume and VOX sq controls AA25 001...

Page 13: ...ou 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...

Page 14: ...e applications use Tefzel MIL M 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...

Page 15: ...models may have significantly different mic characteristics which will affect VOX squelch settings The David Clark M 7 mic is much more active than the M 4 or M 1 mics and may aggravate headset imbala...

Page 16: ...20 27 004 1 37 Pin Connector Hood 20 29 038 1 D min 15 Socket Housing 20 21 015 15 MS Crimp Socket 20 26 901 1 Jack Screw Set 20 27 002 1 Lock Clip Set 20 27 004 1 15 Pin Connector Hood 20 29 015 Use...

Page 17: ...ll AA24 001 90324001 Single User Audio Controller Mechanical 1005 1127 AA24 001 903 0 1 01 Single User Audio Controller 3 D 1128 and up AA24 001 905 0 1 02 Single User Audio Controller 1 of 2 Faceplat...

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Page 43: ...audio controller also provides central volume adjustment for all the aircraft audio 3 3 Controls and Indicators Transmit Selection Control RX Volume Controls RX TX Select Switches VOX Control TX Annu...

Page 44: ...olume adjusts only the local ICS audio level 3 3 3 2 RX Volume Control The outer knob of the dual control is RX VOL and controls the RX volume for all selected radios With RX VOL fully ccw volume will...

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