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Nat 270 Installation And Operation Manual

Universal interface amplifier
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Digitally signed by Barb Page
Date: 2020.02.12 11:25:07 -07:00
Reason: Certify Document
Location: Prescott Arizona, USA

INSTALLATION AND OPERATION MANUAL

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification
Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.
270
Universal Interface Amplifier
REV 4.10 Dec 12, 2006
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
Telephone (250) 763-2232
Facsimile (250) 762-3374
Copyright 2006 by Northern Airborne Technology
V1Y 4N7
SM270

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Summary of Contents for Nat 270

  • Page 1: Installation And Operation Manual

    Digitally signed by Barb Page Date: 2020.02.12 11:25:07 -07:00 Reason: Certify Document Location: Prescott Arizona, USA SM270 Universal Interface Amplifier INSTALLATION AND OPERATION MANUAL REV 4.10 Dec 12, 2006 Northern Airborne Technology Ltd. 1925 Kirschner Road Kelowna, BC, Canada. V1Y 4N7 Telephone (250) 763-2232 Facsimile (250) 762-3374 Copyright 2006 by Northern Airborne Technology...
  • Page 2 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.
  • Page 3 SM270 Rev. 4.10 Model 270 Universal Interface Amplifier Manual Northern Airborne Technology Ltd. has acquired the assets of dB Systems Inc., and has revised and reissued this manual in standard NAT format. Northern Airborne Technology Ltd. will be responsible for all future amendments and revisions.
  • Page 4 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.
  • Page 5 Number Date Changed Entered Insert any Amendment Instruction sheets after this page. Consult NAT for any questions regarding product revisions prior to SM270 Revision 4.10. Dec 12, 2006 Page iii ENG-FORM: 820-0110.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
  • Page 6 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.

  • Page 7: Table Of Contents

    SM270 Rev. 4.10 Model 270 Universal Interface Amplifier Manual Table of Contents Section Title Page Description Introduction Purpose of Equipment Features Specifications 1.4.1 Electrical Specifications 1.4.2 Physical Specifications 1.4.3 Environmental Specifications Unit Nomenclature Installation Introduction Unpacking and Inspection 2.2.1 Warranty Installation Procedures 2.3.1...
  • Page 8 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.

  • Page 9: Introduction

    PTT switching, or other interface functions. The Model 270 can be used as a primary amplifier for an aircraft or vehicle operator station or it can be used as an auxiliary amplifier for interface or other applications.

  • Page 10: Specifications

    Model 270 Universal Interface Amplifier Manual SM270 Rev. 4.10 Specifications 1.4.1 Electrical Specifications 1.4.1.1 Functions FUNCTION DESCRIPTION Audio Input Channel A 600 Ω balanced audio input that is routed to the Audio Output channel. (receiver audio) MIC Input Channel A single-ended input (ground referenced) that is routed to the MIC Output channel and to the Audio Output channel if desired for MIC Sidetone.
  • Page 11 SM270 Rev. 4.10 Model 270 Universal Interface Amplifier Manual The Spare Output channel is fed by the Spare Input channel. A Spare Output Voice Activated Switch circuit (VOX) is installed in the amplifier Channel circuit between the Spare Input and Spare Output channels.
  • Page 12 Model 270 Universal Interface Amplifier Manual SM270 Rev. 4.10 1.4.1.2 Input Specifications INPUT DESCRIPTION Audio Input One differential receiver/transceiver audio input. Input range is Channel 0.5 Vrms to 7.75 Vrms. A 10 KΩ termination resistor to ground is provided on the HI and LO side of the receiver input pins and (receiver audio) a 1 KΩ...

  • Page 13: Physical Specifications

    SM270 Rev. 4.10 Model 270 Universal Interface Amplifier Manual 1.4.1.4 Overall Specifications SPECIFICATION Description ≤-70 dB (-80 dB typical) Isolation & Crosstalk Noise <-80 dB (-80 dB typical) Total Harmonic <1% (typical) Distortion (THD+N) Frequency Response Flat to within 3 dB from 300 Hz to 6000 Hz...
  • Page 14 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.

  • Page 15: Installation

    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.

  • Page 16: Cabling And Wiring

    Model 270 Universal Interface Amplifier Manual SM270 Rev. 4.10 2.3.2 Cabling and Wiring In all installations, use shielded cable exactly as shown and ground as indicated. Significant problems (particularly with ground loop noise) may result from not following these guidelines.

  • Page 17: Adjustments And Selections

    Model 270 Universal Interface Amplifier Manual 2.3.3 Adjustments and Selections Refer to drawing 270 Switches-Pots at the end of this section for all adjustment locations. 2.3.3.1 Trim Adjustments Access to trim pots is through holes in the sides of the cover (see below).

  • Page 18: Mechanical Mounting

    Access to Jumpers J1 and J2 is by cover removal. To remove the Model 270 cover, remove the 4 screws in the sides of the unit (do not remove screws under the base of the unit), and then remove two connector locking-posts that attach the connector to the cover.

  • Page 19: Post-Installation Checks

    P1 pins <14> <15> <20> <21> and <23> for continuity to ground (below 0.5 Ω). 2.3.7 Power On Checks Install the model 270 and power up the ship’s systems. Verify normal operation of all radio functions. Refer to the manual supplied with the mobile radio for specific operation details.

  • Page 20: Installation Drawings

    Model 270 Universal Interface Amplifier Manual SM270 Rev. 4.10 Installation Drawings DRAWING REV. DESCRIPTION TYPE 270 Switches-Pots Mini-Switch Reference 270\270 1.31 Universal Interface Amplifier Outline 270\270-13 Block Diagram 270\521-0 1.00 Universal Interface Amplifier Environmental Qualification Form Section 2 ends after these Drawings...
  • Page 21 BIAS 600 /GND BIAS 600 /GND J1 - MIC-OUT DC-COUPLE SEL. INSTALL JUMPER FOR DC COUPLING REMOVE JUMPER FOR AC COUPLING 270-40 PCB 270-40 PCB MINI-SWITCHES MS5 - AUDIO OUT LOAD SEL. MS6 - RELAY FUNCT. SEL. VOX/LATCH KEYED 270-40 PCB J2 - SPARE-IN VOX THLD SEL.
  • Page 22 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.
  • Page 26 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.

  • Page 29: Introduction

    PTT switching, or other interface functions. The Model 270 can be used as a primary amplifier for an aircraft or vehicle operator station or it can be used as an auxiliary amplifier for interface or other applications.
  • Page 30 These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification Control Number(ECCN) EAR99. When exporting, diversion contrary to U.S. law is prohibited.

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