Northern Airborne Technology AA82 - Manual (Page 11)

AA82 InterMUSIC™ Stereo Intercom System
SM09-1 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 4 Page 2-5
ENG-FORM: 805-0117.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
location for these two sources (radio & ICS), as it will improve recognition of who is speaking in the
system.
2.5.4 Other ICS Functions
Check all installed functions and check the ICS function for all users. The VOX potentiometer on the front
controls all passengers. Adjust as needed for the best performance.
Note: Significantly different headsets may have different microphone characteristics, which affect VOX
squelch settings.
Note: The David Clark M-7 microphone is more active than M-4 or M-1 microphones and may
aggravate headset imbalance if used in a mixed system.
To test KEYED ICS operation of the AA82-060, be sure the VOX potentiometer is set fully clockwise and
all ICS audio is shut off. Keying the ICS switches should activate the specific microphone involved.
Note: Each microphone is individually gated in the AA82-060 and only the microphone involved with a
key signal is activated.
The front panel indicator should illuminate orange when there is activity on the intercom.
2.5.5 Music Selection (AA82-060 only)
The cover of the unit must be removed in order to access jumper locations. Reference Section 6 for
Exploded View AA82\060\904-0 and Component Locator AA82\060\924-0 drawings.
Note: The AA82 is a static sensitive device. Use proper ESD handling procedures when the cover is
removed.
To gain access to the jumpers, remove the cover from the AA82. Remove the top PCB by removing the
three pan head screws and carefully lifting it straight up. When reassembling the unit check that the pins
and connector are aligned properly before screwing the PCB down.
The two types of music inputs are configured by the position of jumpers JP101 and JP102, located on the
main PCB near the access hole for Q101. Music input type is determined as shown in Table 1:
Music Input Type Jumper Positions
Low Z/Portable cassette/CD compatible JP101 and JP102 Installed
High Z/CD changer compatible JP101 and JP102 Removed
Table 1
Music Input Type and Jumper Position
2.5.6 Final Check
Before leaving the aircraft, check that the mating connector is securely fastened to the AA82 and the unit
is securely fastened to the aircraft panel.