Northern Airborne Technology AMU50-001 - Manual (Page 37)

AMU50-001 Audio Management Unit
Installation and Operation Manual
Section 3 Rev: 1.00
Issue 1 Page 3-1
ENG-FORM: 806-0113.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 AMU50-001 Audio
Management Unit (AMU50).
The AMU50 Audio Management Unit has no operator accessible controls.
If the AMU50 is part of the Northern Airborne Technology Ltd Digital Audio Communications System
(DACS), all modifications to the operating parameters are made through the Device Configuration
Software (DevCs). For full information, consult the DevCs manual.
The AMU50 controls the functionality of all the components of an aircraft's communications system,
including, but not limited to, the Audio Control Panels (ACPs) and external switches. The general
functionality of these components is outlined in section 3.3 below.
3.2 General Information
The AMU50 Audio Management Unit is part of the Digital Audio Communication System (DACS), a
management system that distributes and controls all of the transceiver, receiver and warning source
audio in an aircraft. It enables the transmission of microphone audio to a selected Transceiver and
distributes all Inter-Communication System (ICS) audio.
The primary component of the DACS is the AMU50. Connected to this Line Replaceable Unit (LRU) are
the user headsets, transceivers, receivers, and the ACPs. The AMU50 also has an audio accessory port
that enables the connection of a unit for providing ICS audio in the cabin.
3.3 Control Functionality
The AMU50 can be configured to control the functionality of any ACPs and a variety of external switches
and indicators that are connected into the system.
Note: Confirm the specific criteria associated with this installation with your installing agency.
3.3.1 Audio Control Panels
The Audio Control Panels are the operator interface with the AMU and the digital audio communications
system. For information on the operation of the ACP, refer to the relevant Installation and Operation
Manual (for example SM75, the ACP53-001 Audio Control Panel Service Manual.)
All the operational and functional criteria for ACPs installed in a DACS are controlled by the AMU50 and
configured through the DevCs. For full information, consult the DevCs manual.
3.3.2 PTT Keys
The AMU50 supports six TX PTT and seven ICS PTT keys.