Nat AA34-200 Installation And Operation Manual Download Page 8

 

AA34 Series Universal Radio Interface 

SM36 Installation and Operation Manual 

 

 

Section 2 Rev: 1.01 

Issue 4 

Page 2-2 

ENG-FORM: 805-0121.DOT 
 

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD. 

2.4.1  

Warnings 

N/A 

2.4.2  

Cautions 

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. 

2.4.3  

Cabling 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. 

Summary of Contents for AA34-200

Page 1: ...hner 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 Installation and Operation Manual AA34 Series Universal Radio Interface SM36 ISSUE 4 02 ...

Page 2: ...ntrolled 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 Manual Issue Number Section Revision Number Revision Description Issue Date 4 02 Section 2 Rev 1 01 MOD 5 WED Label Change May 21 2010 4 01 Section 1 Rev 1 0...

Page 3: ...mental 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 ...

Page 4: ...e will handle the interface and switching requirements of mobile or CB radio systems when integrated into an aircraft audio system 1 3 Design Features The AA34 Universal Radio Interface units provide microphone excitation relay keying and sidetone generation all fully isolated from airframe ground 1 4 Specifications 1 4 1 Electrical Specifications Input Power 13 8 Vdc 10 or 27 5 Vdc 10 Selected by...

Page 5: ...sh Connectors AA34 200 25 pin male D sub AA34 300 301 25 pin male filtered D sub 1 4 3 Environmental Specifications Temperature 20 C to 55 C Operating 55 C to 85 C Survival Altitude AA34 200 15 000 ft tested to 25 000 ft AA34 300 301 35 000 ft Humidity 95 non condensing Shock 6g any axis Vibration AA34 300 RTCA DO 160C categories B M N Qualification of the AA34 300 Universal Radio Interface was co...

Page 6: ...lectable functions and levels AA34 300 Mobile FM radio interface Provides floating key lines Internal RX Sidetone and Microphone Amplifiers Provides floating audio lines in and out Internal mic exciter with adjustable output Internally selectable functions and levels Designed to meet the requirements of TSO C50c AA34 301 Mobile FM radio interface Provides floating key lines Internal RX Sidetone Am...

Page 7: ... 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 wh...

Page 8: ...hange 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 i...

Page 9: ...anual 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 loca...

Page 10: ... path from input to output The C2 default position switches in the amplifier AA34 200 only AA34 300 and 301 only The C1 C2 switch on the AA34 200 units is a rocker switch with the C1 position to the rear of the access hole and the C2 position at the front The C1 C2 switch on the AA34 300 and 301 units is a slide switch with the C1 position to the left of the access hole and the C2 position to the ...

Page 11: ...ic Output Jumper RX Level Adjustment OPEN S1 S2 C1 C2 2 5 2 1 30 200 mV Mic Output Level Adjustment Remove the cover from the AA34 200 and locate the Mic Output jumper When the jumper is connected across pins A and B the unit level is set at 200 mV When connected across B and C the unit level is set to 30 mV The default setting is A B 2 5 2 2 RX Gain Adjustment Remove the cover from the AA34 200 a...

Page 12: ... Adjustment Mic Output Level Adjustment Mic Output Jumper S1 S2 2 5 3 1 8 600 Ω Audio Output Impedance Adjustment Remove the cover from the AA34 and locate the 8 600 Ω adjustment jumper JP2 When the jumper is connected across pins A and B the unit is set to operate with an 8 Ω load connected When connected across B and C the unit is set to operate with a 600 Ω load connected The default setting is...

Page 13: ...ced document DOCUMENT REV DESCRIPTION TYPE SERIAL MOD NO AA34 200 AA34 200 403 0 1 03 Universal Radio Interface Interconnect All AA34 200 405 0 1 02 Universal Radio Interface Connector Map All AA34 200 922 0 1 02 Universal Radio Interface Mechanical Installation All AA34 300 AA34 300 403 0 1 00 Universal Radio Interface Interconnect All AA34 300 405 0 1 00 Universal Radio Interface Connector Map A...

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Page 19: ...ature Operating Low Temperature Ground Survival High Temperature Short Time Operating High Temp Operating High Temperature In flight Loss of Cooling 4 5 1 4 5 1 4 5 2 4 5 2 4 5 3 4 5 4 55 C 20 C 85 C 70 C 55 C N A No forced air cooling Altitude 4 6 1 35 000 ft 10 668 m Temperature Variation 5 0 Category B Humidity 6 0 Category A Operational Shocks and Crash Safety Operational Shocks Crash Safety 7...

Page 20: ...System Operation per DO 160C subparagraph 16 5 2 1 b 3 Voltage Spike 17 0 Category A Audio Frequency Susceptibility 18 0 Category B Induced Signal Susceptibility 19 0 Category A Radio Frequency Susceptibility 20 0 Change No 3 Category T Radio Frequency Emission 21 0 Category A Lightning Induced Transient Susceptibility 22 0 Category X no test performed Lightning Direct Effects test 23 0 Category X...

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Page 28: ...nd operational procedures for the AA34 Universal Radio Interface 3 2 General Information 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 The AA34 Universal Radio Interface has no operator accessible controls During installation it may be determined that internal level adjustments are...

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