3Com SM69 Stereo System User Manual
Contents
1. vor 1 50 38 1 N 2 Q 5 IN INTER MKR Ics MUSIC F 150 COM COM COM 5 78 146 8 MAX NOTES 1 DIMENSIONING AND TOLERANCING IN ACCORDANCE WITH ASME 1922 CONFIDENTIAL AND PROPRIETARY TO NAT LTD ONES Im DESIGNED ARE INCHES mm DEANN E TECHNOLOGY LTD amp DATE NOV AL COMPACT STEREO 1 2 lbs 0 5 Kg MAX TX a SIZE CAGE CODE PART NO REV SHEET FINISH CHROMATE CONVERSION FILE 922 0 DWG DWG TYPE MECH INSTALLATION DWG NO AA12S 001 922 0 SM69 Rev 4 00 125 Series Compact Audio Controller Manual Section 3 Operation 3 1 Introduction Information in this section consists of the functional and operational procedures for the 125 Series Compact Audio Controllers The information in this manual is applicable to all models unless otherwise specified 3 2 General Information AA12S is a compact Dzus mounted audio controller with an integral 4 place stereo voice activated intercom It provides intercom capabilities for the pilot copilot and two passengers PAX The AA12S accepts stereo music inputs from either portable or fixed entertainment systems2. 034315 LOVdWOD JHL NI 0350 GSLOSNNOO AYN 3 83534 5 AINIISIA LYN OL AyvL3l49dOY4d TIILNACGISNOO 006 0 0 JONVGNOOOV NI 38 GINOHS JISVO SNIM GSGTSIH 6SLEC M IIN NI 38 GINOHS TIV 31319395 SASIMYSHLO 55313 38 AINOHS 5394 SALON 07 XY IN0O YAN IH 09 09 i de A lt 09 09 09 09 lt p 09 09 09 09 Bk 09 09 51 SLHII OGA 824 SLHOIT ION 82 EN 431545 Vd 01 SIN vd Vd 0333538 YOLOANNOO NING F1VN SG ANNOSD 38785 45 03443538 03443538 03443538 03433538 03443538 03433538 01 IL SO SIL SI 521 01 SINOHd IH 1441 SANOHd LHOIWY 5 0121 Ol AJA 521 MS IWNOILdO 5 XVd IH 1441 S3NOHd IH LHOIY SANOHd XVd 2 9 AJA SO
3. AA O 02 SOO DMIN CTOR G CONN PIN FEMALE MATI 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 22 23 24 25 26 27 28 29 50 19 20 21 17 18 O O O O O O O O O O O O O O O SOG Ei AS AS E HER IN RO QIX 2 0 1 ALIS DO 2 0 1 4 gt MX 5 OO 2 TOR ONO O cou ex 6 MX Z oroDzn lt DE ij FADO OYODZA But lt gt aE 9 VA 2 0 N OOS ZI 5 QIX ILJ L ON 0 N OOS E JE 22 07 IO JLo Lu OOS O 5 11 25 24 23 22121 IO 20s O 00000000000 gt Oro 2 25 PIN MALE DMIN MATING CONNECTOR O OO O
4. 125 Series Compact Audio Controller ICS MUSIC vor vox 2 VOL 1 2 3 O ISO COM COM COM 0 00 NAV ADF DME MAX wreR vox INSTALLATION AND OPERATION MANUAL REV 4 00 October 13 2005 Northern Airborne Technology Ltd 1925 Kirschner Road Kelowna BC Canada V1Y 4N7 Telephone 250 763 2232 Facsimile 250 762 3374 Copyright 2005 by Northern Airborne Technology CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 125 Series Compact Audio Controller Manual Periodically NAT will release manual amendments In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record AMENDMENT RECORD Amendment Amendment Section s Date Number Date Changed zZ Entered 806 0001 Oct 14 05 __ Performed at Performed at factory Insert any Amendment Instruction sheets after this page Oct 13 2005 Page ii ENG FORM 820 0109 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD vas INSTALL OPS nat MANUAL AMENDMENT Manual SM69 AA12S Amendment 1 Document SM69 Install_Ops 809 0001 Amendment Date Oct 14 2005 The purpose of this amendment is to change the Revision of the manual to 4 00 to reflect its status as a 2 part manual and to correct a Direct Audio statemen
5. 0 0 0 0 20 IS FROM REAR OF AIRFRAME CONNECTOR VIEW CONFIDENTIAL AND PROPRIETARY TO NAT LTD KV KEH TECHNOLOGY LTD 4 mat NORTHERN AIRBORNE COMPACT STEREO AUDIO CONTROLLER PART NO CAGE CODE 125 001 CONNECTOR DWG NO SIGNED 125 001 405 0 405 0 DWG DWG TYPE D CHECKED APPROVED DESCRIP TION DATE DOCCROO711 TEXT POSITIONS LIVE MAX AND MIN MAX MOVED APR 1 04 ICS MUSIC 492 D vox 7 TEI 2 3 PILOT ISO en COM COM 0 8 5 ADF DME LIVE MAX INTER MKR CONFIDENTIAL AND PROPRIETARY TO NAT LTD TECHNOLOGY LTD DESIGNED DRAWN al AA 5 AUDIO CONTROLLER 5 SHEET APPROVED 1 125 001 110 1 1 FILE 905 0 DWG DWG TYPE FACEPLATE DWG NO AA12S 001 905 0 REVISIONS DESCRIPTION DATE DOCCRO0879 CHG D ADJ HOLE LABELS ON COVER JUN 23 04 4 95 125 7 MAX 2 54 EST 3 10 EST S PRODUCT LABEL 1 5578 5 521 521 MUSIC MUSIC BASS BAL RX VOL o R RX
6. 125 circuit failure that results in a communication failure the automatic fail safe mode can be enabled by pulling the AA12S circuit breaker Note In Automatic Fail Safe mode the receive sidetone levels may require adjustment at the audio source The pilot should confirm that all aspects of Automatic Fail Safe operation are working before accepting the aircraft into service End of section 3 Oct 13 2005 Page 3 5 ENG FORM 806 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD
7. In NORM mode default everyone on the system can talk to each other listen to music and hear all selected radio audio The PILOT ISO mode separates the pilot from the intercom network allowing confidential radio communications without interference from the copilot or passenger intercom or music while maintaining complete control of all the radio functions of the audio panel The copilot and passengers retain normal intercom and music functions Note In PILOT ISO mode the receive sidetone levels may require adjustment at the audio source 3 3 4 Entertainment Audio The 125 accepts stereo music input from portable entertainment units CD players other integrated on board systems The stereo output delivers music to stereo or standard monaural general aviation headsets installation dependent Music muting occurs during any radio or intercom activity Page 3 4 Oct 13 2005 ENG FORM 806 0106 DOT Amendment 1 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 AA12S Series Compact Audio Controller Manual 3 3 5 Automatic Fail safe In the event of a power failure automatic fail safe operation will be activated This routes the pilot s phones mic audio and mic PTT directly to the COM radio selected by the position of the TX rotary selector switch and selected audio inputs Copilot and passengers will have no ICS music or receive functions In the unlikely event of
8. 40 dB nominal 1kQ 10 150 10 11 10 2 10 4 95 125 7 mm max behind panel 5 80 147 3 mm max behind panel 1 15 29 2 mm max 1 2 Ib 0 50 kg max Dzus rail four fasteners 5 366 horizontal spacing and 0 750 vertical spacing Lighted panel is laser engraved acrylic edge lit with blue white backlighting Brushed aluminum with chromate conversion One 25 pin female D min connector with jackposts One 44 pin male high density D min connector with jackposts 125 Environmental Specifications Temperature Altitude Shock 20 C to 55 C 50 000 ft 6g 11ms 20g 11ms Safety of Flight requirements per RTCA DO 160D Environmental Conditions DO 160D Env Cat A1 D1 X BXB SMB UF XXXXXxXZBAXXXMXXXX Page 1 4 ENG FORM 800 0107 DOT Oct 13 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 AA12S Series Compact Audio Controller Manual 1 3 4 Unit Nomenclature Variants ofthe AA12S series Compact Audio Controllers are identified as follows AA12S 001 Unassigned Options Lighting Voltage 1 3 4 1 Unassigned Options These portions of the designator may be assigned to future special options 1 342 Lighting Voltage This portion of the designator refers to the lighting voltage of the specific model 001 28 lighting 004 14 Vdc lighting End of section 1 Oct 13 2005 Page 1 5 ENG FORM 800 0107 DOT CONFIDENTIAL AND PRO
9. MS IVNOILdO 01 S3NOHd 09 1441 5 09 LHOIY S3NOHd 09 IH 1 IH amp wove E 1011409 HOLIMS 0121 doo Ol 05 AJA XL doo SA ec eee SO HOLIMS 591 10114039 01 5 IH 1 NHd 1441 S3NOHd yoyr IH LHOIY S3NOHd E 10114 HOLIMS 4 0121 IH 21 AJA XL AJA AJA SI HOLIMS 531 10 01 250 1441 955 A 324005 1331 OISNW 1H9la 9ISA ANNOYS YIMOd E 5578 SOINOINV Vi OGA 82 71 YOLOSNNOO ONILVIN NING JIYNW34 N LOL LOO SZLVV SMN vO OL 70014 SYM LOSA ONY 2017 SYM 1067 0 900452048 OVI 31v0 NOILdINOS3d SNOISIA33 REVISIONS MWS MAR 10 04 DESCRIP TION 1 10 DOCCRO0670 P301 WAS P102 OW 1 GE 2 N SC Mu N lel OO ISDN Ge HVOF DOY Xi E eh Q JOr Ex gt atx E 0Er EDEN NED 22 09
10. to produce high quality stereo headset output Radio functions include selectable transmit capability for pilot and copilot on 3 COM radios and a PA Receive audio selections include COM1 COM2 COM3 MKR NAV ADF and DME 3 2 1 Features All four mics have individual VOX gating Each gate may also be activated with the corresponding ICS keyline ICS muting is automatic during radio transmission The unit is supplied to suit a standard NAT bidirectional ICS audio TIE line for multi unit interface configuration dependent The crew and PAX are always connected except in the case of Pilot ISO mode when the pilot is disconnected from the ICS tie line 3 2 2 Installation Adjustments The following audio levels can be adjusted at the time of installation or during service by an approved dealer using individual level trimpots e Music Mute level Sidetone level e ICS Bass level ICS Balance e RX volume level e RX Balance e Music Bass level e Music Balance Oct 13 2005 Page 3 1 ENG FORM 806 0106 DOT Amendment 1 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD 125 Series Compact Audio Controller Manual SM69 Rev 4 00 3 3 Operation Specifics 3 3 1 Radio Selection MUSIC VOL 1 2 3 COM COM COM vox VOX TX Annunciator RX Select Switches TX Select Switch 3 3 1 1 Receive The AA12S is typically configured to select the RX audio from three transceivers and
11. up to four additional receivers The RX Select switches are white double throw centre off switches Receiver audio can be selected by setting the appropriate RX select switch to the down position Transceiver audio can either be selected by setting the appropriate RX select switch to the up position or as a function of the TX select switch The transceiver that is selected by the TX select switch is also automatically selected for receive Receive sidetone audio for the selected COM is automatically provided When a switch is in the centre off position no transceiver receiver audio is selected 3 3 1 2 Transmit The TX select switch is a 4 position rotary control that provides radio selection for up to three transceivers and a PA By selecting the desired transceiver and pressing the external TX PTT switch the AA12S is activated for transmit operation connecting the respective mic to the selected transceiver The transceiver that is selected by the TX select switch is also automatically selected for receive The front panel annunciator will illuminate green to indicate transmit operation see section 3 1 3 TX selections are available only to the pilot and copilot Activation of either TX PTT input connects the user s MIC to the selected COM and activates the output PTT to the selected COM When PTT is pressed all audio except the sidetone of the selected COM and NAV inputs is removed from the headphone of the particular PTT user The si
12. L IKC The D44SL IKC consists of Quantity Description NAT Part 1 D min 44 Socket Housing 20 20 044 44 Mini D Crimp Socket 20 26 703 1 Jack Screw Set 20 27 002 1 Lock Clip Set 20 27 004 1 25 pin Connector Hood 20 29 026 The D25PL IKC consists of Quantity Description NAT Part 1 D min 25 Pin Housing 20 11 025 25 MS Crimp Pin 20 26 891 1 Jack Screw Set 20 27 002 1 Lock Clip Set 20 27 004 1 25 Pin Connector Hood 20 29 026 Use as required Page 2 4 Oct 13 2005 ENG FORM 805 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 125 Series Compact Audio Controller Manual 2 6 Installation Drawings DRAWING REV DESCRIPTION TYPE SERIAL AA12S 0014403 0 1 10 125 Compact Audio Controller Interconnect All AA12S 001 405 0 1 10 125 Compact Audio Controller Connector Map All AA12S 001 905 0 1 10 125 Compact Audio Controller Faceplate All AA12S 001 922 0 1 10 125 Compact Audio Controller Mech Installation All Section 2 ends after these Drawings Oct 13 2005 Page 2 5 ENG FORM 805 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD O OFNIOONSZIVV ON 193NNO9Y3LNI AdAL OMG 0 207 37 1 1 LOO SZLVV 08v 133H ON 3002 39v9 NOILOINNOO IVNY3LX3 ON ST 393HL SISOJSNA 1531 5 38 Nid JHL NOILONA4 3HL 3LVALLOV YSATIONLNOO OL YO
13. PRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 125 Series Compact Audio Controller Manual Section 2 Installation 2 1 Introduction Information in this section consists of unpacking and inspection procedures installation procedures post installation checks and installation drawings 2 2 Unpacking and Inspection Unpack the equipment carefully and locate the warranty card Inspect the unit visually for damage due to shipping and report all such claims immediately to the carrier involved Note that each unit should have the following 125 Series Compact Audio Controller Warranty Card Operator s Manual Release certification Verify that all items are present before proceeding and report any shortage immediately to your supplier 2 2 1 Warranty Complete the warranty card information and send it to NAT when the installation is complete If you fail to complete the warranty card the warranty will be activated on date of shipment from NAT Note An appropriately rated facility e g Certified Aircraft Repair Station must install this equipment in accordance with applicable regulations NAT Ltd s warranty is not valid unless the equipment is installed by an authorized NAT Dealer Failure to follow any of the installation instructions or installation by a non certified individual or agency will void the warranty and may result in a non airworthy installation 2 3 Installation Procedures 2 3 1 Wa
14. Quantity 4 COM1 COM2 COM3 and PA Rated level 250 mVrms 10 Impedance 150 Ohm nominal Circuitry type direct throughline via relay Keylines Quantity 4 COM1 COM2 COM3 and PA Rated level Circuitry type grounded relay contact Audio Performance As per RTCA DO 170 Product Classification 1a except where noted Manufacturers Specification Exceeds DO 170 requirement Rated Output Power each stereo channel 100 mW min into 300 Audio freq Response Receive lt 3dB down from 350 6000 Hz Intercom lt 3dB down from 350 3000 Hz ICS Tie lt 3dB down from 350 3000 Hz Music lt 3dB down from 300 15000 Hz Music Bass control at mid setting Distortion lt 10 lt 3 typical 350 to 6000 Hz Input Input crosstalk 37 dB max Input Output crosstalk 55 dB max Input Mic crosstalk lt 200 uVrms Oct 13 2005 Page 1 3 ENG FORM 800 0107 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD 125 Series Compact Audio Controller Manual SM69 Rev 4 00 1 3 2 1 3 3 Audio noise Output Regulation Audio Communication ICS Volume controls Music Volume controls Receive Input impedance Mic Input impedance Music Input impedance ICS Tie Line Physical Specifications Width Depth Height Weight Mounting Faceplate Material Finish Connectors Installation Kit 60 dB max lt 3 dB variance 350 to 6000 Hz Loud amp Clear 35 dB range 40 dB nominal 35 dB range
15. by the position of the VOX control LIVE ICS When the VOX control is positioned fully counter clockwise all mics will be live and any sound picked up by the microphone s will be processed by the ICS system KEYED ICS When the VOX control is positioned fully clockwise cw the intercom will be in a keyed only mode VOX ICS When the VOX control is positioned between fully cw and fully ccw the intercom is in VOX mode To establish the VOX threshold rotate the control ccw until the LED turns red and then rotate the control cw until the LED goes dark Continue turning the control cw until the desired voice sensitivity is set Oct 13 2005 Page 3 3 ENG FORM 806 0106 DOT Amendment 1 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD 125 Series Compact Audio Controller Manual SM69 Rev 4 00 3 3 2 2 ICS Volume Control The ICS VOL control which has a line to mark rotational position is at minimum volume when fully As the knob is rotated cw the ICS volume for crew and PAX increases The ICS is muted during transmit operations 3 3 3 PILOT ISO NORM Modes ISS y vox 55 MUSIC i R ZE N COM COM COM PILOT ISO 2 2 NAV ADF DME LIVE ur 1 8 Pilot Isolate Switch The PILOT ISO NORM control is a red two position toggle switch that allows selection of either NORM Normal or PILOT ISO Pilot Isolate
16. detone of the active COM is provided from the COM radio The PA position provides PA mic audio and PA keyline to an external amplifier e g AA21 AA23 PA250 for use as either a Loudhailer or Passenger Address system A priority transmission feature allows the pilot to override the co pilot Page 3 2 Oct 13 2005 ENG FORM 806 0106 DOT Amendment 1 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 AA12S Series Compact Audio Controller Manual 3 3 1 3 VOX TX Annunciator The VOX TX Annunciator is a bicolour LED that indicates the intercom status During VOX activity the annunciator LED is illuminated red If TX is keyed with no ICS or sidetone the annunciator LED is illuminated green If TX is keyed with mic or sidetone the combination of red and green will cause the LED to appear amber Note If the LED is still illuminated green after transmission is concluded this indicates a possible stuck mic 3 3 2 Intercom ICS MUSIC VOL VOL 1 2 9 COM COM COM MAX NAV ADF ICS Squelch Control VOX TX Annunciator The VOX and ICS VOL control is a fluted concentric knob with the ICS volume on the centre knob and the VOX control on the outer knob 3 3 2 1 VOX Control The VOX control is used to set the level of audio required to activate the microphones The 125 provides three modes of intercom operation selected
17. he unit is supplied to suit a standard NAT bidirectional ICS audio TIE line for multi unit interface configuration dependent The crew and PAX are always connected except in the case of Pilot ISO mode when the pilot is disconnected from the ICS tie line If required one or more receiver audio inputs may be configured at the factory prior to ordering as an unswitched Direct Audio input s A new part number may be assigned Contact NAT Product Support for further information 1 2 2 Installation Adjustments The following audio levels can be adjusted at the time of installation or during service by an approved dealer using individual level trimpots e Music Mute level Sidetone level e ICS Bass level e ICS Balance e RX volume level e RX Balance e Music Bass level e Music Balance ENG FORM 800 0107 DOT Amendment 1 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD AA12S Series Compact Audio Controller Manual SM69 Rev 4 00 1 3 Specifications 1 3 1 Electrical Specifications Power Supply Input voltage 11 30 Vdc operating Linear regulator with reverse and over voltage protection Internal supply 11 Nominal Lighting Voltage 27 5 Vdc 200 mA max 125 001 13 5 400 mA max 125 004 Nom Operating Voltages 27 5 Vdc 600 mA max one input for both 13 8 Vdc 600 mA max Maximum Operating Minimum Operating 30 3 11 0 Note The AA12S is not designed to ope
18. ical noise at the headset jack locations For best results all headset jacks should be fully isolated from the airframe 2 3 4 Cabling and Wiring All unshielded wire should be MIL W 22759 or equivalent For shielded wire applications use Tefzel MIL C 27500 shielded wire with solder sleeves for shield terminations to make the most compact and easily terminated interconnect Follow the wiring diagrams in Section 2 6 as required Allow 3 inches from the end of the wire to the shield termination to allow the hood to be easily installed Note that the hood is a clamshell hood and is installed after the wiring is complete All wiring should be at least 22 AWG except power and ground lines which should be at least 20 AWG Ensure that all ground connections are clean and well secured 2 3 5 Post Installation Checks If any preset requires adjustment be sure this is carried out before the aircraft leaves and that the unit and its mating connector are secured before departure Make all required log book entries electrical load weight and balance amendments and other paperwork as required by your local regulatory agency Page 2 2 Oct 13 2005 ENG FORM 805 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 AA12S Series Compact Audio Controller Manual 2 3 5 1 Voltage Resistance Checks Check the following a P101 pin lt 1 gt for avionics buss voltage b P101 pin lt 16 gt for conti
19. ngs 2 5 3 Operation 3 1 Introduction 3 1 3 2 General Information 3 1 3 2 1 Features 3 1 3 2 2 Installation Adjustments 3 1 3 3 Operation Specifics 3 2 3 3 1 Radio Selection 3 2 3 3 2 Intercom 3 3 3 3 3 PILOT ISO NORM Modes 3 4 3 3 4 Entertainment Audio 3 4 3 3 5 Automatic Fail safe 3 5 Oct 13 2005 Page iii ENG FORM 820 0109 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 125 Series Compact Audio Controller Manual Section 1 Description 1 1 Introduction Information in this section consists of the functional and operational procedures for the 125 Series Compact Audio Controllers The information in this manual is applicable to all models unless otherwise specified 1 2 General Information AA12S is a compact Dzus mounted audio controller with an integral 4 place stereo voice activated intercom It provides intercom capabilities for the pilot co pilot and two passengers PAX The AA12S accepts stereo music inputs from either portable or fixed entertainment systems to produce high quality stereo headset output Radio functions include selectable transmit capability for pilot and co pilot on 3 COM radios and a PA Receive audio selections include COM1 COM2 COM3 MKR NAV ADF and DME 1 2 1 Features All four mics have individual VOX gating Each gate may also be activated with the corresponding ICS keyline ICS muting is automatic during radio transmission T
20. nuity to ground P101 pins lt 9 gt lt 10 gt lt 11 gt and lt 12 gt for continuity to ground when the relevant switch is closed Also check pins lt 13 gt and lt 14 gt if switches are installed in these positions d P301 pin lt 5 gt for avionics lighting bus voltage relative to ground with lighting on e P301 pin lt 17 gt for continuity to ground 2 3 5 2 Power On Checks a Install the AA12S and power up the ship s systems Turn on the radios and accessories required for the system b Check for correct radio audio and adjust for acceptable level Run through all installed functions and check the ICS and TX functions for users Refer to Section 3 for specific operation details Note Significantly different headsets may have different mic characteristics d If any preset requires adjustment be sure this is carried out before the aircraft leaves and that the unit and its mating connector are secured before departure Make all required log book entries electrical load weight and balance amendments and other paperwork as required by your local regulatory agency 2 3 6 Adjustments The internal adjustments that can be varied are located along the sides of the unit and are accessed through necessary switches and trimpots Note 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 set
21. rate under emergency electrical system conditions for 14 Vdc operation Receive Audio Input Signals Mic Quantity 4 Pilot Copilot 2 Passengers Rated level 250 mVrms nominal 125 to 500 mVrms Impedance 150 Ohm 10 Circuitry type unbalanced TX Keyline Quantity 2 Pilot Copilot Rated level ground activates keyline lt 20 mA source current ICS Keyline Quantity 4 Pilot Copilot 2 Passengers Rated level ground activates keyline lt 1 mA source current Quantity 7 3 COM 4 NAV Rated level 2 5 Vrms nominal 1 3 to 5 0 Vrms Impedance 1 kOhm 10 1 to kOhm for sidetone Circuitry type unbalanced Music Inputs Quantity 2 left channel right channel Rated level 1 4 Vrms nominal 850 mVrms to 2 4 Vrms Impedance 11 kOhm 10 Circuitry type unbalanced Page 1 2 ENG FORM 800 0107 DOT Oct 13 2005 Oct 14 2005 CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD Amendment 1 SM69 Rev 4 00 AA12S Series Compact Audio Controller Manual Bidirectional Signals ICS TIE Channel Quantity 1 Rated level 340 mVrms nominal 170 to 680 mVrms Impedance 2 kOhm 10 Circuitry type unbalanced Output Signals Phones Quantity 4 Pilot Copilot 2 Passengers Rated level gt 5 5 Vrms gt 100 mW RX ICS and music gt 0 7 Vrms TX sidetone adjustable 1 5 Vrms nominal Pilot ISO mode gt 0 2 Vrms Automatic failsafe mode Impedance 300 Ohm 10 Circuitry type transformer unbalanced Mics
22. rnings Do not bundle any lines from this unit with transmitter coax lines Do not bundle any audio or DC power lines from this unit with 400 Hz synchro wiring or AC power lines Do not position this unit or wiring from this unit next to any device with a strong alternating magnetic field such as an inverter or significant audio interference will result Oct 13 2005 Page 2 1 ENG FORM 805 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD AA12S Series Compact Audio Controller Manual SM69 Rev 4 00 2 3 2 Cautions In all installations use shielded cable exactly as shown and ground as indicated Significant ground loop and noise problems may result from not following these guidelines The shielding and routing of the MIC and ICS TIE LINES used in the AA12S installation is very critical and poor performance of the aircraft audio system will result if these issues are not handled properly The operation of the VOX intercom can be severely degraded by the quality and type or mix of microphones used in the aircraft If one user has a very hot microphone it will present more electrical signal to the VOX circuit and the VOX SQUELCH will have to be set to quiet this microphone The other microphones may not be able to generate enough electrical energy to overcome this VOX SQUELCH setting and will break up or not be heard at all 2 3 3 Notes Audio performance can be impaired by the introduction of airframe electr
23. t removed from Section 3 3 1 added to Section 1 2 1 NB This amendment can be performed on both Rev 1 00 OR Rev 4 00 of this manual Amendment Instructions Replace With Pages __ _ VIEH 1 __ 1 1 and 1 2 Rev 1 00 4 00 1 1 and 1 2 Rev 4 00 Amendment 1 3 1 to 3 4 Rev 1 00 or 4 00 3 1 to 3 4 Rev 4 00 Amendment 1 2 Update the Amendment Record sheet the front of the manual 3 Insert this page into the manual after the Amendment Record sheet page ii Manual Amendment ends after the following amended pages Amendment 1 Oct 14 2005 Page 1 ENG FORM 809 0109 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD SM69 Rev 4 00 125 Series Compact Audio Controller Manual Table of Contents Section Title Page 1 Description 1 1 Introduction 1 1 1 2 General Information 1 1 1 2 1 Features 1 1 1 2 2 Installation Adjustments 1 1 1 3 Specifications 1 2 1 3 1 Electrical Specifications 1 2 1 3 2 Physical Specifications 1 4 1 3 3 Environmental Specifications 1 4 1 3 4 Unit Nomenclature 1 5 2 Installation 2 1 Introduction 2 1 2 2 Unpacking and Inspection 2 1 2 2 1 Warranty 2 1 2 3 Installation Procedures 2 1 2 3 1 Warnings 2 1 2 3 2 Cautions 2 2 2 3 3 Notes 2 2 2 3 4 Cabling and Wiring 2 2 2 3 5 Post Installation Checks 2 2 2 3 6 Adjustments 2 3 2 4 Continued Airworthiness 2 4 2 5 Accessories Required But Not Supplied 2 4 2 6 Installation Drawi
24. tings to best suit the local operating environment 2 3 6 1 Left Side Adjustments The adjustments found on the left side of the unit are ICS BAL which controls the ICS Balance ICS BASS which controls the ICS bass level and MUSIC MUTE which controls the Music mute level ICS ICS MUSIC BAL BASS MUTE Oct 13 2005 Page 2 3 ENG FORM 805 0106 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD AA12S Series Compact Audio Controller Manual SM69 Rev 4 00 2 3 6 2 Right Side Adjustments The adjustments found on the right side of the unit RX RX MUSIC MUSIC PAL voL BASS PAE Sir TX S T which controls the sidetone level os i RX BAL R L which controls the RX Balance RX VOL which controls the RX volume level MUSIC BASS which controls the Music Bass level and MUSIC BAL R L which controls the Music balance 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 AA12S is on condition only Periodic maintenance of this product is not required 2 5 Accessories Required But Not Supplied Installation kit p n AA12S IKC crimp is required to complete the installation The kit consists of one 44 Pin D min Female Crimp Kit NAT Part D44SL IKC and one 25 Pin D min Male Crimp Kit Part D25P
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