Nat AA12 Installation And Operation Manual
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AA12 Compact Audio Controller Manual SM21 Rev. 4.102.3.7 AdjustmentsThe unit is shipped from the factory with all internal adjustments set to the normal testlevels. Once installed in the aircraft, it may be desirable to change some of thesesettings to best suit the local operating environment. The internal adjustments that canbe 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. FullyCCW will disable the music input. Fully CW will disable the ATC MUTE capability forthe music.S/T Adjusts level of internally generated artificial sidetone. Should be used only ifsidetone is not produced by existing radios. Normally set to OFF (fully CCW).RX Adjusts level of receive audio from radio equipment. Should be balanced foradequate level in both InterVOX and PIL ISO modes of operation, when monitored fromthe pilot position.MUSIC Adjusts level of external music source (Walkman, etc.). Typically set tomid range.Upon satisfactory completion of all performance checks, make the required logentries and complete the necessary Regulatory Agency paperwork beforereleasing the aircraft for service.2.4 Continued AirworthinessMaintenance of the AA12 is ‘on condition’ only. Periodic maintenance of this product isnot required.2.5 Accessories Required But Not SuppliedInstallation kit p/n D25P25SL-IKC is required to complete the installation. The kitconsists of one D25SL-IKC 25-pin D-min Female Crimp Kit, and one D25PL-IKC 25-pinD-min Male Crimp Kit. These consist of the following:D25SL-IKCQuantity Description NAT Part #1 D-min 25 Socket Housing 20-21-02525 MS Crimp Socket 20-26-9011* Jack Screw Set 20-27-0021* Lock Clip Set 20-27-0041 25 Pin Connector Hood 20-29-026Page 2-4 Sep 9, 2004ENG-FORM: 805-0106.DOTCONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD. |
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