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Страница 1: ...2 Facsimile 250 762 3374 Issued on the authority of Northern Airborne Technology Ltd Copyright 2004 Installation and Operation Manual AA38 3xx Series Local ICS Loop SM37 ISSUE 4 11 The document reference is online please check the correspondence between the online documentation and the printed version ...

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Страница 5: ... Product Approval 1 3 1 5 Unit Nomenclature 1 3 2 Installation 2 1 Introduction 2 1 2 2 Unpacking and Inspection 2 1 2 2 1 Warranty 2 1 2 3 Continued Airworthiness 2 1 2 4 Installation Procedures 2 2 2 4 1 Cautions 2 2 2 4 2 Cabling and Wiring 2 2 2 4 3 Installation Options 2 2 2 4 4 Post Installation Checks 2 4 2 5 Adjustments and Connections 2 4 2 5 1 Audio Levels 2 4 2 6 Accessories Required Bu...

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Страница 7: ...al to the AA38 300 but has two fully independent AA38 300 PCB assemblies mounted inside the enclosure and can therefore provide the same intercom functions for sixteen users 1 3 Design Features The AA38 3xx Series remote bulkhead mounted units contain all the circuitry to support a wide variety of ICS Loop applications particularly isolation ICS amplifier use where the output is required to be hea...

Страница 8: ... mics are single ended inputs Tie lines are single ended inputs Aux line is single ended input Better than 60 dB input to input crosstalk Mic to Aux to ICS Output Signals Quantity 8 Headset outputs AA38 300 Quantity 16 Headset outputs AA38 301 Rated Level Headset output 7 7V rms or 100 mW 20 dBm into 600 Impedance 30 10 Headset output Circuitry Type Balanced output for high common mode noise rejec...

Страница 9: ...th jack posts 1 4 3 Environmental Specifications Temperature 30 to 55 C operating 55 to 85 C survival Altitude 25 000 feet max Humidity 95 Qualification of the AA38 300 Local ICS Loop was completed in accordance with DO 160C Env Cat B4 CA BMN XXXXXXZBABBTZXXX Note Refer to Environmental Qualification Form located in Section 2 of this Manual for complete details of the environmental categories 1 4 ...

Страница 10: ... NORTHERN AIRBORNE TECHNOLOGY LTD AA38 301 Intercom functions for sixteen users Selectable NAT ICS or Andrea Tie Lines ICS volume AUX volume and VOX controls Live and VOX Intercom modes VOX operation LED and 28 Vdc Power LED Section 1 ends The document reference is online please check the correspondence between the online documentation and the printed version ...

Страница 11: ... years from date of installation by an authorized NAT dealer to be free of defects in workmanship or performance This warranty covers all materials and labour but is exclusive of any transport to deliver the defective unit to and from NAT or its designated warranty repair center or any labour to remove or re install the defective unit in the aircraft Contact NAT for any questions regarding this wa...

Страница 12: ...d and is installed after the wiring is complete Aircraft harnessing shall permit the unit to be lowered from the panel for easy access to all side adjustments Do NOT mount the unit until all adjustments have been performed Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers Maintenance Instructions Unless otherwise noted all wiring shall be a minimum o...

Страница 13: ...e ICS GAIN switch 1 DOWN ICS GAIN switches 2 3 and 4 UP ICS MODE switch C1 C2 to C2 and C3 C4 to C4 See figure 2 2 NAT ICS Tie Lines ICS GAIN switch 2 DOWN ICS GAIN switches 1 3 and 4 UP ICS MODE switch C1 C2 to C2 and C3 C4 to C4 See figure 2 3 NAT ICS Tie Lines ICS GAIN switch 3 DOWN ICS GAIN switches 1 2 and 4 UP ICS MODE switch C1 C2 to C2 and C3 C4 to C4 See figure 2 ANDREA Tie Lines ICS GAIN...

Страница 14: ...on 2 5 for details of adjustments Notes 1 Significantly different headsets may have different mic characteristics 2 The David Clark M 7 mic is much more active than their M 4 or M 1 microphones and may aggravate headset imbalance if used in a mixed system Upon satisfactory completion of all performance checks make all required log book entries electrical load weight and balance amendments and othe...

Страница 15: ...03 0 1 00 Local ICS Loop Interconnect 1622 and up AA38 300 405 0 1 00 Local ICS Loop Connector Map 1622 and up AA38 300 521 0 1 02 Local ICS Loop Environmental Qualification Form 3000 and up AA38 300 922 0 1 00 Local ICS Loop Mechanical Installation 1622 to 2999 AA38 300 922 0 1 10 Local ICS Loop Mechanical Installation 3000 to 3284 AA38 300 922 0 1 20 Local ICS Loop Mechanical Installation 3825 a...

Страница 16: ... RQI L GHQW L DO DQG 3U RSU L HW DU W R 1 7 The document reference is online please check the correspondence between the online documentation and the printed version ...

Страница 17: ... RQI L GHQW L DO DQG 3U RSU L HW DU W R 1 7 The document reference is online please check the correspondence between the online documentation and the printed version ...

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Страница 29: ...ight users sixteen for the AA38 301 with operation in HOT MIC or VOX mode A switch selectable NAT or Andrea tie line allows connection to multi unit systems and an AUX input allows radio or music to be connected to the AA38 3 3 Controls and Indicators The AA38 3xx Local ICS Loop has no normal user operational aspects During installation or if the unit has been exchanged it may be a requirement to ...

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