Northern Airborne Technology NTA01-001 User Manual

SM71

NTA01-001
Motorola Series Radio Adapter

INSTALLATION AND OPERATION MANUAL

REV 4.10 February 6, 2006

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Copyright 2006 by Northern Airborne Technology

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM71 Rev. 4.10 NTA01-001 Motorola Series Radio Adapter 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

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Note: Revision 4.00 was the first public release of this document

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Insert any Amendment Instruction sheets after this page.

Feb 6, 2006 Page ii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM71 Rev. 4.10 NTA01-001 Motorola Series Radio Adapter Manual

Table of Contents

Section Title Page

1 Description

1.1 Introduction 1-1

1.2 Purpose of Equipment 1-1

1.3 Features 1-1

1.4 Specifications 1-2

1.4.1 Electrical Specifications 1-2

1.4.2 Physical Specifications 1-4

1.4.3 Environmental Specifications 1-4

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 Cabling and Wiring 2-2

2.3.4 Installation of Radio into NTA01-001 2-2

2.3.5 Post-Installation Checks 2-3

2.3.6 Adjustments 2-3

2.4 Continued Airworthiness 2-4

2.5 Accessories Required But Not Supplied 2-4

2.6 Installation Drawings 2-4

3 Operation

3.1 Introduction 3-1

3.2 General 3-1

3.3 Operation Specifics 3-1

Feb 6, 2006 Page iii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM71 Rev. 4.10 NTA01-001 Motorola Series Radio Adapter Manual

Section 1 Description

1.1 Introduction

This manual contains information on the NTA01-001 Motorola Series Radio Adapter.
All derivative products will be covered by manual supplements which can be obtained
from NAT as required.

Information in this section consists of purpose of equipment, features and specifications.

Note: The NTA01-001 Motorola Series Radio Adapter has been designed for use with

the remote-mounted version of Motorola’s Astro and XTL-series radios. If there
is any question about the suitability of the NTA01-001 for a specific Motorola
radio, contact the Product Support department at NAT Ltd.

1.2 Purpose of Equipment

The NTA01-001 is a remote-mounted adapter unit, specifically designed to incorporate
the remote-mounted version of Motorola’s Astro and XTL-series radios into an aircraft
environment. It provides all required interface functions to integrate a car/motorcycle
radio into an aircraft environment, such as power conversion, mic excitation, sidetone
generation, impedance matching and level conversion.

1.3 Features

The NTA01-001 is a tray-mounted unit that accepts remote-mounted versions of the
Motorola radio (7 inches long maximum and with a 15-watt transmit maximum radio).
The preferred method of control of the Motorola radio is via a TH-Series Tac/Com
Control head with a suitable radio interface installed in it.

The NTA01-001 provides voltage conversion from +28 to +13 Vdc, mic bias for
amplified microphones, a remote on/off line (supplied by the control head), artificial
sidetone during transmission, and level and impedance matching of the radio’s audio
signals to the aircraft audio system.

Programming of the Motorola Astro radio is accomplished with a PC and a Motorola RIB or
SRIB box and Motorola RSS programming software via a 15-pin connector on the front of
the NTA01-001. This feature is not available with the XTL-series radios.

Feb 6, 2006 Page 1-1

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

NTA01-001 Motorola Series Radio Adapter Manual SM71 Rev. 4.10

1.4 Specifications

1.4.1 Electrical Specifications

Power Supply One switcher and one linear regulator with over-

voltage, over-current and thermal protection.

Operating Voltages:
Nominal +27.5 Vdc
Maximum +30.3 Vdc
Minimum +22.0 Vdc
Emergency +18.0 Vdc

Current Consumption
NTA01-001 only 250 mA @ +28 Vdc

With radio 500 mA typical @ +28 Vdc Standby

2.75 A typical @ +28 Vdc transmitting at 10 W

Power Output to radio +13 Vdc ±10% @ 5 A max. (20% duty cycle)

Internal Fuse 7 A
Breaker Current Rating 5 A

Input Signals

Mic Input from audio control panel:

Level 250 mVrms

Mic AC Input Impedance 150 Ω ±10%
Mic DC Input Impedance 470 Ω ±10%
Input Type Single ended

Speaker Input from radio:
Level 6.4 Vrms
Input Impedance 600 Ω ±10%
Input Type Balanced

Power On/Off:
Level <1 Vdc (logic low)
>3 Vdc (logic hi)

Page 1-2 Feb 6, 2006

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM71 Rev. 4.10 NTA01-001 Motorola Series Radio Adapter Manual

Output Signals

Mic Output to radio:
Level 150 mVrms ±10% into 150 Ω
Output Type Balanced

Receive Audio Output to audio control panel:
Receive Audio Level 100 mW into 600 Ω nominal
Sidetone Audio Level 25 mW into 600 Ω nominal
Output Type Balanced

Frequency Response <3 dB from 350 Hz to 6000 Hz

Distortion <10% @ rated output

Noise Level Without Signal >50 dB down from rated output

Receive Audio Output Regulation <10% variation when the load is changed to

75% and 400% of the rated load

Relay Contacts 1 A @ 30 Vdc max. (Closed when keyline active)

Bi-directional Signals

RF Input/Output Impedance 50 Ω

Floating lines that pass through the NTA01-001 to the Radio:

Lines from J1 to J104: Lines from J2 to J102:
RESET CTS-RS232
A+ EMER
DIG GND N/C SPARE
SW B+ SW B+
BUSY N/C SPARE
BUS + SPKR HI
BUS – SPKR LO
BUS SHIELD DIG GND
ANA GND BUSY
RADIO ON/OFF BUS –
N.O. CONTACT RX-RS232
WIPER N/C SPARE
TX-RS232
BUS +
RTS-RS232

Feb 6, 2006 Page 1-3

ENG-FORM: 800-0108.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.