Northern Airborne Technology AA12 - Manual (Page 14)

AA12 Compact Audio Controller Manual SM21 Rev. 4.10
2.3.7
Adjustments
The unit is shipped 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. The internal adjustments that can
be varied are located along the left side of the unit and are as follows:
ATC Adjusts the trigger point for music muting from an incoming radio source. Fully
CCW will disable the music input. Fully CW will disable the ATC MUTE capability for
the music.
S/T Adjusts level of internally generated artificial sidetone. Should be used only if
sidetone is not produced by existing radios. Normally set to OFF (fully CCW).
RX
Adjusts level of receive audio from radio equipment. Should be balanced for
adequate level in both InterVOX and PIL ISO modes of operation, when monitored from
the pilot position.
MUSIC
Adjusts level of external music source (Walkman, etc.). Typically set to
mid range.
Upon satisfactory completion of all performance checks, make the required log
entries and complete the necessary Regulatory Agency paperwork before
releasing the aircraft for service.
2.4 Continued Airworthiness
Maintenance of the AA12 is ‘on condition’ only. Periodic maintenance of this product is
not required.
2.5 Accessories Required But Not Supplied
Installation kit p/n D25P25SL-IKC is required to complete the installation. The kit
consists of one D25SL-IKC 25-pin D-min Female Crimp Kit, and one D25PL-IKC 25-pin
D-min Male Crimp Kit. These consist of the following:
D25SL-IKC
Quantity Description NAT Part #
1 D-min 25 Socket Housing 20-21-025
25 MS Crimp Socket 20-26-901
1* Jack Screw Set 20-27-002
1* Lock Clip Set 20-27-004
1 25 Pin Connector Hood 20-29-026
Page 2-4 Sep 9, 2004
ENG-FORM: 805-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.