Nat InterMUSIC AA83-001, Installation And Operation Manual

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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.