Northern Airborne Technology AA83-100 - Manual (Page 31)

SM10 Rev. 4.10 AA31 ICS Mode Controller Manual
Feb 4, 2005 Page 3-1
ENG-FORM: 806-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
AA31 ICS Mode Controller.
3.2 General
The AA31 ICS Mode Controller provides a convenient, centralized method of organizing
the aircraft audio system into multiple intercom circuits for independent or common
operation. This function is especially valuable for EMS and law enforcement
applications, where several independent operations occur within the aircraft that often
require isolation from each other, while retaining the ability to share common
communication.
3.3 Operation Specifics
Intercom Function Selector
3.3.1 Intercom Function Selector
The Intercom Function selector is a rotary 4-position switch that is used to select ‘talk
groups’ for intercom (ICS).
Selecting ALL ISO isolates all ICS positions from each other. The ICS tie lines of the Pilot
Audio Controller, Co-pilot Audio Controller, and the Rear Audio Controller(s) are not
connected, but the ICS tie lines of both Rear Audio Controllers remain connected together.
Selecting PILOT ISO isolates the pilot from all other positions. The Pilot Audio
Controller is not connected to the ICS tie line of any other Audio Controller, but the ICS
tie line of the Co-pilot Audio Controller is connected to the ICS tie line of the Rear Audio
Controller(s).
REAR CALL LEFT ISO ALL COMMON REAR CALL RIGHT
Annunciator Annunciator Annunciator Annunciator