Northern Airborne Technology MB01 User Manual

Installation and Operation Manual

MB01-001

Matching Box

SM72

ISSUE 4.01

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Issued on the authority of Northern Airborne Technology Ltd.

Copyright 2005

MB01-001 Matching Box

SM72 Installation and Operation Manual

Prepared By: Checked By: Approved By:

The status of this installation and operation manual is controlled by issue shown on the title page. The
status of each section is controlled by revision shown in the footer of each page. All revisions affecting
sections of this manual have been incorporated into the latest issue.

ISSUE/REVISION RECORD

Manual Issue

Number

Section

Revision Number

Revision Description Issue Date

4.01 Section 1 Rev: 1.00

Updated to current format. Apr 3, 2009
Section 2 Rev: 1.00
Section 3 Rev: 1.00

Installation and Operation Manual Page ii

ENG-FORM: 820-0114.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.

MB01-001 Matching Box

SM72 Installation and Operation Manual

Table of Contents

Section Title Page

1. Description

1.1 Introduction 1-1

1.2 Product Description 1-1

1.3 Design Features 1-1

1.4 Specifications 1-1

1.4.1 Electrical Specifications 1-1

1.4.2 Physical Specifications 1-2

1.4.3 Environmental Specifications 1-2

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 2-1

2.4.1 Warnings 2-1

2.4.2 Cautions 2-2

2.4.3 Cabling and Wiring 2-2

2.4.4 Post-Installation Checks 2-2

2.5 Adjustments and Connections 2-3

2.6 Installation Drawings 2-4

3. Operation

3.1 Introduction 3-1

3.2 General Information 3-1

3.3 Controls and Indicators 3-1

Installation and Operation Manual Page iii

ENG-FORM: 820-0114.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.

MB01-001Matching Box

SM72 Installation and Operation Manual

Section 1 Description

1.1 Introduction

Information in this section consists of product description, design features and specifications for the
MB01-001Matching Box. All derivative product information shall be contained in the applicable manual
supplement, which may be obtained from NAT as required.

Review all notes, warnings and cautions.

1.2 Product Description

The MB01-001 is a remote mounted audio level matching unit for 8 transceivers and 10 receivers. It
provides 8 floating key signals and is capable of providing unamplified artificial sidetone. The unit also
provides a diode OR’ed DF Mute signal when any of the transceivers are keyed.

1.3 Design Features

The MB01-001 is made up of 8 subassemblies: 2 ‘Receiver’ subassemblies, 4 ‘Transceiver’
subassemblies, one Test subassembly and one Backplane subassembly. Each ‘Receiver’ subassembly
supports 5 receivers and each ‘Transceiver’ subassembly supports two transceivers. The Test
subassembly connector provides the installing agency access to all microphone and receive signals while
all the equipment is connected. This allows proper level adjustments to be made while all inputs and
outputs are loaded. The MB01-001 supports real sidetone, dedicated sidetone inputs (with 6dB of
attenuation) and can generate unamplified artificial sidetone. All connectors are labeled to assist with
proper connection to the airframe wiring.

1.4 Specifications

1.4.1 Electrical Specifications

Input Signals
Quantity 18 Receive inputs

8 Microphone inputs
8 Sidetone inputs

Audio Level 4.9 Vrms nominal for receive inputs

4.9 Vrms nominal for sidetone inputs
1 Vrms nominal for microphone inputs

Impedance 350 Ω ±10% max for microphone inputs
600 Ω ±10% for receive inputs
1000 Ω ±10% for sidetone inputs

Circuitry Type All are balanced inputs
Keylines PTT <30 mA input current

Section 1 Rev: 1.00 Issue 4 Page 1-1

ENG-FORM: 800-0114.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.

MB01-001Matching Box

SM72 Installation and Operation Manual

Output Signals
Quantity 18 Receive outputs

8 Microphone outputs
Audio level 2 Vrms nominal for receive outputs

2 Vrms nominal for sidetone outputs

0.5 Vrms nominal for microphone outputs
Impedance 600 Ω ±10% for microphone outputs

375 Ω ±10% for receive outputs
Distortion <10% THD @ Rated power output
Circuitry Type All are balanced outputs
Keylines Floating or direct PTT

≤0.5 A at 30 Vdc Resistive handling current
≤0.1 A at 30 Vdc Inductive handling current

DF Mute Keylines are diode OR’ed and produce a summed output on

each of the receiver cards

1.4.2 Physical Specifications

Height 3.15" (80.1mm)
Depth 4.00" (101.6 mm)
Width 8.11" (206.0 mm)
Weight 2.5 lbs
Mounting Bulkhead mount with four 10-32 screws
Material/Finish Chassis & cover are 5052-H32 brushed aluminum with chromate

conversion finish

Connectors Six male 37-pin D-submin connectors with Positronics V5 locking

tabs, and one female 62 pin high density D-submin connector
with Positronics V5 locking tabs

1.4.3 Environmental Specifications

Temperature
Operating -40° C to +70° C DO-160C Cat. B4

Survival -55° C to +85° C
Altitude 25,000 ft. Max.

Section 1 Rev: 1.00 Issue 4 Page 1-2

ENG-FORM: 800-0114.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.

MB01-001Matching Box

SM72 Installation and Operation Manual

Shock DO-160C Cat N Operational Shock only
Qualification DO-160C as contracted

Section 1 ends

Section 1 Rev: 1.00 Issue 4 Page 1-3

ENG-FORM: 800-0114.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.