Northern Airborne Technology AA38-3xx - Manual (Page 4)

AA38-3xx Series Local ICS Loop
SM37 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-1
ENG-FORM: 800-0114.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
AA38-3xx Series Local ICS Loop. All derivative product information shall be contained in the applicable
manual supplement, which may be obtained from NAT as required.
Review all notes, warnings and cautions.
1.2 Product Description
The AA38-300 Local ICS Loop provides intercom functions for eight users with operation in HOT MIC or
VOX mode. A switch-selectable NAT or Andrea tie line allows connection to multi-unit systems and radio
or music can be connected at the AUX input.
The AA38-301 Local ICS Loop is functionally identical to the AA38-300 but has two fully independent
AA38-300 PCB assemblies mounted inside the enclosure and can therefore provide the same intercom
functions for sixteen users.
1.3 Design Features
The AA38-3xx Series remote bulkhead mounted units contain all the circuitry to support a wide variety of
ICS Loop applications, particularly isolation/ICS amplifier use, where the output is required to be headset
or line level.
The compact size and low weight of the AA38 allows mounting in restricted locations and the mapped
interconnect makes installation simple to carry out.
Built-in LED annunciators speed up airframe trouble-shooting by providing an indication of power to the
AA38 and VOX operation.
Level adjustments are provided for ICS level and AUX Input level.
1.4 Specifications
1.4.1 Electrical Specifications
Input Power
Input Voltage
27.5 Vdc, with reverse and over-voltage protection
32.2 Vdc max.
Input Current
0.66 Amps Max. @ 27.5 Vdc