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Installation and Operation Manual
AA34 Series
Universal Radio Interface
SM36
ISSUE 4.01
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Issued on the authority of Northern Airborne Technology Ltd.
Copyright 2003
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Prepared By: |
Checked By: |
Certification: |
Approved By: |
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The status of this installation and operation manual is controlled by issue shown on the title page. The status of each section is controlled by revision shown in the footer of each page. All revisions affecting sections of this manual have been incorporated into the latest issue.
ISSUE/REVISION RECORD
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Manual Issue |
Section |
Revision Description |
Issue Date |
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Number |
Revision Number |
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4.01 |
Section 1 |
Rev: 1.00 |
Rewritten in latest format |
Jan 11, 2010 |
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Section 2 |
Rev: 1.00 |
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Section 3 |
Rev: 1.00 |
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4.00 |
n/a |
Initial Release |
Nov 10, 2003 |
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Installation and Operation Manual |
Page ii |
ENG-FORM: 820-0115.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Table of Contents
Section |
Title |
Page |
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1.Description
1.1 |
Introduction |
1-1 |
1.2 |
Product Description |
1-1 |
1.3 |
Design Features |
1-1 |
1.4 |
Specifications |
1-1 |
1.4.1 |
Electrical Specifications |
1-1 |
1.4.2 |
Physical Specifications |
1-2 |
1.4.3 |
Environmental Specifications |
1-2 |
1.4.4 |
Product Approval |
1-2 |
1.5 |
Unit Nomenclature |
1-3 |
2.Installation
2.1 |
Introduction |
2-1 |
2.2 |
Unpacking and Inspection |
2-1 |
2.2.1 |
Warranty |
2-1 |
2.3 |
Continued Airworthiness |
2-1 |
2.4 |
Installation Procedures |
2-1 |
2.4.1 |
Warnings |
2-2 |
2.4.2 |
Cautions |
2-2 |
2.4.3 |
Cabling and Wiring |
2-2 |
2.4.4 |
Post-Installation Checks |
2-3 |
2.5 |
Adjustments and Connections |
2-3 |
2.5.1 |
External Adjustments |
2-3 |
2.5.2 |
Internal Adjustments (AA34-200 only) |
2-5 |
2.5.3 |
Internal Adjustments (AA34-300 and AA34-301 only) |
2-6 |
2.6 |
Accessories Required But Not Supplied |
2-7 |
2.7 |
Installation Drawings |
2-7 |
3.Operation
3.1 |
Introduction |
3-1 |
3.2 |
General Information |
3-1 |
Installation and Operation Manual |
Page iii |
ENG-FORM: 820-0115.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Section 1 Description
1.1Introduction
Information in this section consists of product description, design features and specifications for the AA34-200, AA34-300 and AA34-301 Universal Radio Interfaces. All other derivative product information shall be contained in the applicable manual supplement, which may be obtained from Northern Airborne Technology Ltd. as required.
Review all notes, warnings and cautions.
1.2Product Description
The AA34 Universal Radio Interface will handle the interface and switching requirements of mobile or CB radio systems when integrated into an aircraft audio system.
1.3Design Features
The AA34 Universal Radio Interface units provide microphone excitation; relay keying, and sidetone generation, all fully isolated from airframe ground.
1.4Specifications
1.4.1Electrical Specifications
Input Power |
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+13.8 Vdc ± 10% or 27.5 Vdc ± 10% (Selected by |
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appropriate pin) |
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(AA34-200) |
160 mA |
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(AA34-300\301) |
70 mA |
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Input Signals |
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250 mVrms @ 150 Ω ±10% |
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Mic |
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Audio |
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2.5 Vrms @ 600 Ω ±10% |
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Output Signals |
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Approx. 225 mVrms max into 150 Ω |
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Mic |
(AA34-200) |
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(AA34-300\301) |
Adjustable to 1.5 Vrms max into 600 Ω or 178 mVrms |
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into 8 Ω |
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Audio |
(AA34-200) |
200 mW into 150 or 600 Ω nominal |
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(AA34-300\301) |
100 mW into 8 or 600 Ω nominal |
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*Frequency Response |
<3 dB from 350 Hz to 6 kHz |
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*Distortion |
<10% @ rated output |
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*Noise level without signal |
>50 dB down from rated output |
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Section 1 Rev: 1.00 |
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Issue 4 |
Page 1-1 |
ENG-FORM: 800-0116.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
*Regulation |
<10% variation from 75% to 400% of load |
*These signals have been determined for the AA34-300 and AA34-301 only
1.4.2Physical Specifications
Height |
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1.30 inches (33.0 mm) max |
Depth |
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2.71 inches (68.8 mm) max excluding connector |
Width |
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4.54 inches (115.3 mm) max |
Weight |
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AA34-200 |
0.63 lb (285 g) max |
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AA34-300\301 |
0.40 lb (180 g) max |
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Mounting |
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Bulkhead mount with four 10-32 screws |
Material/Finish |
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5052-H32 brushed aluminum chassis and cover with |
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conversion finish |
Connectors |
AA34-200 |
25 pin male D-sub |
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AA34-300\301 |
25 pin male filtered D-sub |
1.4.3Environmental Specifications
Temperature
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-20 C to +55 |
C (Operating) |
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-55 C to +85 |
C (Survival) |
Altitude |
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AA34-200 |
15,000 ft (tested to 25,000 ft) |
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AA34-300\301 |
35,000 ft |
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Humidity |
95% non-condensing |
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Shock |
6g (any axis) |
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Vibration (AA34-300) |
RTCA/DO-160C categories (B,M,N) |
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Qualification of the AA34-300 Universal Radio Interface was completed in accordance with DO-160C Env. Cat. C1-BA[BMN]XXXXXXABABATAXXX
Qualification of the AA34-301 Universal Radio Interface was completed in accordance with DO-160C Env. Cat. C1-BA[MN]XXXXXXABABATAXXX
Note: Refer to Environmental Qualification Form located in Section 2 of this Manual for complete details of the environmental categories.
1.4.4Product Approval
FAA: TSO-C50c (RTCA/DO-170 Class II, RTCA/DO-160C) Applicable to AA34-300 units s/n 20,001 and up
Section 1 Rev: 1.00 |
Issue 4 |
Page 1-2 |
ENG-FORM: 800-0116.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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AA34 Series Universal Radio Interface |
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SM36 Installation and Operation Manual |
1.5 |
Unit Nomenclature |
Model |
Description |
AA34-200 |
Mobile/FM radio interface. |
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Provides floating key lines. |
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Internal RX & Sidetone Amplifier. |
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Provides floating audio lines in and out. |
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Internal mic exciter with adjustable output. |
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Internally selectable functions and levels. |
AA34-300 |
Mobile/FM radio interface. |
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Provides floating key lines. |
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Internal RX, Sidetone and Microphone Amplifiers. |
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Provides floating audio lines in and out. |
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Internal mic exciter with adjustable output. |
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Internally selectable functions and levels. |
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Designed to meet the requirements of TSO C50c. |
AA34-301 |
Mobile/FM radio interface. |
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Provides floating key lines. |
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Internal RX & Sidetone Amplifier. |
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Provides floating audio lines in and out. |
Internal mic exciter with adjustable output.
Internally selectable functions and levels.
External on/off control of mic output.
Designed to meet the requirements of TSO C50c.
Section 1 ends
Section 1 Rev: 1.00 |
Issue 4 |
Page 1-3 |
ENG-FORM: 800-0116.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Section 2 Installation
2.1Introduction
Information in this section consists of unpacking and inspection procedures, installation procedures, post-installation checks and installation drawings for the AA34 Series Universal Radio Interface.
Review all notes, warnings and cautions.
2.2Unpacking 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. Check that all items listed below are present before proceeding and report any shortage immediately to your supplier:
-Warranty Card
-Certificate of Conformity or Release Certification
2.2.1Warranty
All Northern Airborne Technology Ltd. products are warranted for 2 years from date of installation by an authorized Northern Airborne Technology Ltd. dealer, to be free of defects in workmanship or performance. This warranty covers all materials and labour, but is exclusive of any transport to deliver the defective unit to and from Northern Airborne Technology Ltd. or its designated warranty repair center, or any labour to remove or re-install the defective unit in the aircraft. Contact Northern Airborne Technology Ltd. for any questions regarding this warranty, its applicability to your units and/or for return authorization. Northern Airborne Technology Ltd. is the final arbitrator concerning warranty administration. Units which have been physically damaged, burned, immersed in water or otherwise abused beyond the scope of normal use will not be considered for warranty. WARRANTY IS VOID UNLESS THE PRODUCT IS INSTALLED BY AN AUTHORIZED NORTHERN AIRBORNE TECHNOLOGY LTD. DEALER. Product for which a warranty card is not returned shall be warranted from date of manufacture.
2.3Continued Airworthiness
Maintenance of the AA34 Series Universal Radio Interface is ‘on condition’ only. Periodic maintenance of this product is not required.
2.4Installation Procedures
Installation Notice
This product must be installed in accordance with the installation instructions provided in the latest issue of this Installation and Operation Manual. Check the Publication Index at www.northernairborne.com for the issue status of the manual. The latest issue of the manual may be downloaded from the same website. All risk associated with installation of this product contrary to these instructions shall be the responsibility of the installing agency.
Section 2 Rev: 1.00 |
Issue 4 |
Page 2-1 |
ENG-FORM: 805-0121.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
2.4.1Warnings
N/A
2.4.2Cautions
CAUTION:
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 audio interference will result.
In all installations, use shielded cable exactly as shown, and ground as indicated. Significant problems may result from not following these guidelines.
Incorrect wiring and shielding, can seriously degrade audio installations and result in abnormal cross-talk, hum and ground-loop noise. Be especially careful with all microphone wiring, as these lines can carry the lowest level signals in the aircraft.
2.4.3Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer's Maintenance Instructions or AC43.13-1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify 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 interconnect drawing in Section 2.7 as required.
Allow 3" from the end of the shielded wiring to the shield termination to allow the connector hood to be easily installed. Refer to the interconnect drawing in Section 2.7 for shield termination details. Note that the hood is a "clamshell" hood, and is installed after the wiring is complete.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers Maintenance Instructions.
Unless otherwise noted, all wiring shall be a minimum of 22 AWG, except power and ground lines, which shall be a minimum of 20 AWG. Reference the Interconnect drawing for additional specifications. Check that the ground connection is clean and well secured, and that it shares no path with any electrically noisy aircraft accessories such as blowers, turn and bank instruments or similar loads. Power to this unit must be supplied from a separate circuit breaker or fuse (fast blow), and not attached to any other circuit breaker without additional protection. Verify that the selected circuit breaker size and wire gauge are adequate for the installation using the techniques specified in AC43.13-1B Change 1, Paragraphs 11-47 through 11-51 and 11-66 through 11-69.
Section 2 Rev: 1.00 |
Issue 4 |
Page 2-2 |
ENG-FORM: 805-0121.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
2.4.4Post-Installation Checks
2.4.4.1Voltage/Resistance Checks
Do not attach the AA34 until the following conditions are met.
Check the following:
a)(AA34-200, AA34-300 and AA34-301) P101 pin <1> for +28 Vdc relative to ground or P101 pin <2> for +14 Vdc relative to ground.
b)(AA34-200) P101 pins <14> <15> and <23> for continuity to ground (below 0.5 Ω).
c)(AA34-300\301) P101 pins <8> <14> <15> <20> <21> and <23> for continuity to ground (below 0.5 Ω).
2.4.4.2Power On Checks
Power up the aircraft’s systems and confirm normal operation of all functions of the AA34. Verify normal operation of all radio functions. Refer to the manual supplied with the mobile radio for specific operation details.
a)To verify proper operation, all functions and levels shall be checked in-flight.
b)Check preset adjustments are completed before aircraft departure.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical load, weight and balance amendments and other documentation as required by your local regulatory agency before releasing the aircraft for service.
2.5Adjustments and Connections
The AA34 permits many possible interfaces. To prevent loss of communications, ensure that any replacement unit is configured exactly the same as the one it is replacing.
2.5.1External Adjustments
The unit is shipped from the factory with all external 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. The external adjustments are accessible through the left side and rear of the unit.
Section 2 Rev: 1.00 |
Issue 4 |
Page 2-3 |
ENG-FORM: 805-0121.DOT |
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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