Northern Airborne Technology AA83-001 rev.4.10 - Manual (Page 15)

SM09-2 Rev. 4.10 AA83-001 InterMUSIC™ Stereo Intercom System Manual
2.3.5
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:
2.3.4.1 ICS, RX, and MUSIC BAL.
These potentiometers are used to adjust the headset stereo balance.
Note: The balance adjustment pots permit signals to be shifted in the user's acoustic
listening space so that tower transmissions appear to come from one area, and
intercom from another. This greatly aids in signal recognition and more
accurately reproduces a natural listening environment for the flight crew.
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.
Oct 20, 2004 Page 2-3
ENG-FORM: 805-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.