Northern Airborne Technology 247 Owner's Manual
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Northern Airborne Technology 247 Owner's Manual

Audio mixing amplifier
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Installation and Operation Manual
Model 247
Audio Mixing Amplifier
(size the image to allow for optimal viewing).
SM247
ISSUE 2.00
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Issued on the authority of Northern Airborne Technology Ltd.
Copyright 2005

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Summary of Contents for Northern Airborne Technology 247

  • Page 1 (size the image to allow for optimal viewing). SM247 ISSUE 2.00 Northern Airborne Technology Ltd. 1925 Kirschner Road Kelowna, BC, Canada. V1Y 4N7 Telephone (250) 763-2232 Facsimile (250) 762-3374 Issued on the authority of Northern Airborne Technology Ltd. Copyright 2005...

  • Page 3: Table Of Contents

    Mechanical Installation 2.4.5 Electrical Installation 2.4.6 Pin Assignment 2.4.7 Post Installation Checks Adjustments Accessories Required But Not Supplied Installation Drawings Operation Introduction General Information Installation and Operation Manual Page iii ENG-FORM: 820-0114.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

  • Page 4: Description

    Outputs from the Model 247 are designed to drive any impedance from 8 ohms up to 10K ohms. Output power is limited by 100 ohm resistors on each output. If additional inputs are needed beyond the four inputs provided for each mixing circuit, an output from one mixer circuit can be fed to the input of another mixer thereby increasing the size of the mixer.

  • Page 5: Physical Specifications

    -55° to +70° C Altitude -15,000 to 70,000 feet Qualification of the Model 247 Audio Mixing Amplifier was completed in accordance with RTCA/DO-160C Env. Cat. [A2F2]-BA(CL)XXXXXXZ(BZ)AAATZ(XXC2)XX Note: Refer to Environmental Qualification Form located in Section 2 of this Manual for complete details of the environmental categories.

  • Page 6: Installation

    2.2.1 Warranty All Northern Airborne Technology Ltd. products are warranted for 2 years from date of installation by an authorized Northern Airborne Technology Ltd. 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 Northern Airborne Technology Ltd.

  • Page 7: Warnings

    Verify that the selected circuit breaker size and wire gauge are adequate for the installation using the techniques specified in AC43.13-1B Change 1, Paragraphs 11-47 through 11-51 and 11-66 through 11-69. Section 2 Rev: 1.00 Issue 2 Page 2-2 ENG-FORM: 805-0118.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

  • Page 8: Mechanical Installation

    2.4.5 Electrical Installation The Model 247 has 3 separate power and ground inputs for each of its 3 internal mixer circuits. This is designed to allow maximum flexibility for the installer if separate power supplies are used. All three power and ground inputs can also be connected together and supplied from one source. Maximum current draw for each mixer circuit within the Model 247 is 0.5 Amps assuming maximum output voltage...

  • Page 9: Post Installation Checks

    Internal Adjustments below. Refer to Assembly drawing 247-1 in the SM247 Maintenance manual. To remove the Model 247 cover, remove the 2 screws in the top of the unit. Do not remove screws under the base of the unit. Lift the cover to remove.

  • Page 10: Accessories Required But Not Supplied

    1000 and up 247\403-0 1.00 Audio Mixer Amplifier Interconnect 247\247\521-0 1.00 Audio Mixer Amplifier Environmental Qual Form Section 2 ends following the above documents Section 2 Rev: 1.00 Issue 2 Page 2-5 ENG-FORM: 805-0118.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
  • Page 11 This page intentionally left blank...
  • Page 15 24.0 Category X, no test performed REMARKS: Model 247-xxx was qualified to the environmental test requirements of RTCA DO-160C by similarity to Model 250-xxx - Tests of DO-160C, Sections 4.0 (paragraphs 4.5.1, 4.5.2, and.4.5.3), 5.0, 16.0 and 18.0 were conducted on the Model 250 at dB Systems, Inc. in Redmond, Washington.

  • Page 16: Operation

    SM247 Installation and Operation Manual Section 3 Operation Introduction Information in this section consists of the functional and operational procedures for the Model 247 Audio Mixing Amplifier. General Information The Model 247 Audio Mixing Amplifier has no operator accessible controls. During installation, it may be determined that internal level adjustments are required.

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