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4 adjustments, 5 mechanical installation – Northern Airborne Technology AA83-001 rev.4.00 User Manual

Page 15

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SM09-2A Rev. 4.00

AA83-001 InterMUSIC™ Stereo Intercom System Manual


2.3.4

Adjustments

The unit ships from the factory with all internal adjustments set to the normal test levels.
Once installed in the aircraft, it may be desirable to change some of these settings to
best suit the local operating environment.

CAUTION


Before performing the following adjustments ensure the aircraft radio’s
volume control is set to produce 2.5 Vrms

±10 % at the input to the

AA83-001, or the mute functions may not operate correctly.


The internal adjustments are located along the sides of the unit and are as follows:

Left side of unit

Right side of unit


2.3.4.1

ICS, RX, and MUSIC BAL.


These potentiometers are used to adjust the headset stereo balance.

2.3.4.2

ICS and MUSIC BASS


These potentiometers are used to adjust the amount of bass audio to the headsets.
Rotating ccw will lower the bass level, and cw will raise it.

2.3.4.3

RX VOL


To reduce the receive audio volume, rotate this potentiometer ccw, and to increase the
volume, rotate it cw.

2.3.4.4

MUSIC MUTE


The music mute level can be adjusted using this potentiometer.

2.3.5

Mechanical Installation

Before the unit is mounted, make all functional tests and trimpot adjustments. Be sure
the harness has enough clearance to permit the unit to be dropped down for re-
adjustment, if needed later. Make sure unit is securely fastened to the panel, and that
the connector locks are tightened before any flight is attempted.

Feb 8, 2006 Page 2-3

ENG-FORM: 805-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.