Northern Airborne Technology AA34 - Manual (Page 4)

AA34 Series Universal Radio Interface
SM36 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-1
ENG-FORM: 800-0116.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 1 Description
1.1 Introduction
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.
1.2 Product 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.
1.3 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
appropriate pin)
(AA34-200) 160 mA
(AA34-300\301) 70 mA
Input Signals
Mic 250 mVrms @ 150
Ω ±10%
Audio 2.5 Vrms @ 600
Ω ±10%
Output Signals
Mic (AA34-200) Approx. 225 mVrms max into 150
Ω
(AA34-300\301) Adjustable to 1.5 Vrms max into 600
Ω or 178 mVrms
into 8
Ω
Audio (AA34-200) 200 mW into 150 or 600
Ω nominal
(AA34-300\301) 100 mW into 8 or 600
Ω nominal
*Frequency Response <3 dB from 350 Hz to 6 kHz
*Distortion <10% @ rated output
*Noise level without signal >50 dB down from rated output