Northern Airborne Technology DA80 User Manual

A

SM57

DA80 Series

DA80-001

DA80-010

DigiVOX™

Digital Intercom

UTO PTT

INSTALLATION AND OPERATION MANUAL

REV 4.10 October 13, 2004

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Copyright 2004 by Northern Airborne Technology

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom 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

Amendment

Number

Amendment

Date

Section(s)

Changed

Date

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Entered By

Insert any Amendment Instruction sheets after this page.

Oct 13, 2004 Page ii

ENG-FORM: 823-0100.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom 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

1.5 Unit Nomenclature 1-5

2 Installation

2.1 Introduction 2-1

2.2 Unpacking and Inspection 2-1

2.2.1 Warranty 2-1

2.3 Installation Procedures 2-2

2.3.1 Warnings 2-2

2.3.2 Cautions 2-2

2.3.3 Notes 2-2

2.3.4 Cabling and Wiring 2-3

2.3.5 Installation Options 2-4

2.3.6 Adjustments 2-4

2.3.7 Mechanical Installation 2-5

2.3.8 Post-Installation Checks 2-6

2.4 Continued Airworthiness 2-7

2.5 Accessories Required 2-7

2.6 Installation Drawings 2-7

3 Operation

3.1 Introduction 3-1

3.2 General 3-1

3.3 Controls and Indicators 3-1

3.3.1 Mode switch 3-1

3.3.2 ICS VOLUME Control 3-2

3.3.3 VOX SQUELCH Control 3-2

3.3.4 TX/ICS Indicator 3-3

3.4 Mute Functions 3-3

3.4.1 ICS Mute Functions 3-3

3.4.2 Music Mute Functions 3-4

Oct 13, 2004 Page iii

ENG-FORM: 823-0100.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

Section 1 Description

1.1 Introduction

This section contains information on the DA80 Series DigiVOX™ Digital Intercoms.
Throughout this section the unit will be referred to as the DA80, and information
provided will be common to all models unless noted otherwise.

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

1.2 Purpose of Equipment

The DA80-001 is a voice-activated Digital Intercom system. It provides full transmit and
intercom capabilities for the pilot and copilot, plus intercom functions for up to two
passengers.

The DA80-010 Digital Intercom provides full radio and intercom capabilities for the pilot
and copilot, plus intercom and radio receive functions for up to two passengers. Music is
available at all positions. The crew and passengers share a common VOX control.
One volume control sets the ICS volume in all four headsets.

1.3 Features

The DA80 is designed to be backward-compatible with the AA80-001 to allow simple
upgrades to existing installations. It can be mounted either vertically or horizontally.

The DA80 accepts stereo music input from a portable or fixed entertainment system to
produce high quality mono-headset output. ICS mute is automatic during radio
transmission. Music is fully muted during any audible radio or ICS operation and
gradually (within 0.5 to 1.5 seconds) returns after that operation. The priority
transmission feature allows the pilot to override the copilot.

Front panel features include VOX SQUELCH and ICS VOLUME controls plus a toggle
switch for emergency operating (PILOT ISO) mode. Both modes have voice
annunciation. In the emergency mode (PILOT ISO) the pilot is separated from the co­pilot and passengers and the radio audio is removed from all other headsets.

When AutoVOX™ mode is selected, the squelch is automatically set by the processor
and depends on the ambient noise in the aircraft. The transmit keylines are monitored
for stuck mic condition and the processor will announce a message after 30 seconds of
continuous transmission. For the DA80-001, this mode is selected when the VOX
SQUELCH knob is set to the fully clockwise position, and for the DA80-010, it is
selected when the VOX SQUELCH knob is set to the fully counterclockwise (ccw)
position.

Oct 13, 2004 Page 1-1

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10

A bi-color LED will show green for Transmit condition and amber for VOX operation.
High roll-off finite impulse response filters are used to shape the audio delivered to the
phones and radio microphone.

The following audio messages are embedded to provide information of system
operation.

DA80-001 DA80-010

• System Ready • System Ready

• Emergency Mode • Pilot Isolate

• Normal Mode • Normal Mode

• AutoVOX™ • AutoVOX™ Mode

• Stuck Mic. • Stuck Mic

1.4 Specifications

1.4.1 Electrical Specifications

Power Supply

Description: Multiple switches and linear regulators with

Normal operating conditions:

Nom. Operating Voltage: 27.5 Vdc / 13.8 Vdc
Max. Operating Voltage: 30.3 Vdc
Min. Operating Voltage: 11.0 Vdc

Input current 0.3 A max @ 27.5 Vdc
Input current 0.6 A max @ 13.8 Vdc

Input Signals

Quantity: 4 Microphone channels
1 Receive channel
2 Music channels (Left, Right)
2 Transmit key lines
1 Intercom key line (DA80-010 only)

Rated Level: 250 mVrms for microphone inputs

2.5 Vrms for receive input
500 mVrms for music inputs

reverse and over voltage protection. Short
circuit protected by internal fuse.

Page 1-2 Oct 13, 2004

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

DA80-001 only Transmit PTT<10 mA input current, active low

(3 Vdc max.)

DA80-010 only Transmit Key <15 mA input current, active low

(3 Vdc max)

ICS Key <15 mA input current, active low (3 Vdc

max)

Impedance: 1 kΩ ±10% for receive and music inputs
150 Ω ±10% for mic inputs

Circuitry Type: All inputs are single ended

Coupling: <-60dB input-to-input crosstalk

Output Signals

Quantity: 4 Phone outputs
1 Transmitter mic output
1 Transmitter keyline output

Rated Level:

Phones output: 100mW (7.7 Vrms) into 600 Ω

TX mic output: 250 mV rms nominal into 150 Ω

Circuitry Type: All outputs are single ended

Freq. Resp.:
Phones output:
Receive input <3 dB from 350 Hz to 6000 Hz
Music input <3 dB from 350 Hz to 6000 Hz
Intercom input <3 dB from 350 Hz to 6000 Hz
TX mic output <3 dB from 350 Hz to 6000 Hz

Distortion: <1% THD @ rated power output

Audio Noise Level: Without Signal: >70 dB down from rated output

Coupling: <-60 dB input-to-output crosstalk

Output regulation: <1% THD / 3dB max. of rated output power
At 400% and 75% of rated load

Oct 13, 2004 Page 1-3

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10

1.4.2 Physical Specifications

Dimensions: (Same size as the original AA80)

Height 1.35” (34.3 mm) max

Depth 5.62” (142.7 mm) max not including connector

Width 2.65” (67.3 mm) max

Weight 0.6 lb (0.272 kg) max

Faceplate Lexan label with vertical or horizontal legends.

Pressure sensitive adhesive backing attached
to a black anodized plate

Mounting Three black 6-32 brass screws that sandwich

the dash panel between the faceplate and
chassis. Aircraft panel thickness 0.050" to

0.125". The DA80 is mount-compatible with
the AA80-001

Material/Finish Brushed aluminum with chromate conversion

Connectors One 25 pin male (DB25P) D-min connector

with Jackposts

1.4.3 Environmental Specifications

Temperature:

Operating -20° C to +55° C

Survival -55° C to +85° C

Altitude 50,000 ft

Humidity 95%

Shock:

Operational 6 g

Crash Safety 15 g

Qualification:

DA80-001: DO-160C Env. Cat. A1/D1-XAB[(SBM)(UF)]XXXXXXZBABAXMXXXX
DA80-010: DO-160D Env. Cat. A1/D1-BAB[(SBM)(UF)]XXXXXXZBABA[UUX]LXXXX

Page 1-4 Oct 13, 2004

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

1.5 Unit Nomenclature

Model Description / Distinction

DA80-001 4 place operation.

Music muted during ICS and radio operations.
Individual mic gating.
Bi-color LED.
ICS volume and VOX Squelch controls.
Live, VOX and AutoVOX™ Intercom modes.

DA80-010 4 place operation.

Music muted during ICS and radio operations.
Individual mic gating.
Bi-color LED.
ICS volume and VOX Squelch controls.
PTT, VOX and AutoVOX™ Intercom modes.

End of section 1

Oct 13, 2004 Page 1-5

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

Section 2 Installation

2.1 Introduction

Information in this section consists of: unpacking and inspection procedures, installation
procedures, post-installation checks, and installation drawings.

Throughout this section the unit will be referred to as the DA80, and information
provided will be common to all models unless noted otherwise.

2.2 Unpacking and Inspection

Unpack the equipment carefully and locate the warranty card. Inspect the unit visually
for damage due to shipping and report all such claims immediately to the carrier
involved. Note that each unit should have the following:

- DA80 DigiVOX™ Digital Intercom

- Install Kit (with metal ‘hood’)

- Warranty Card

- Operators Manual

- Release certification

Verify that all items are present before proceeding and report any shortage immediately
to your supplier.

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. NAT Ltd’s warranty is
not valid unless the equipment is installed by an authorized NAT Dealer. Failure
to follow any of the installation instructions, or installation by a non-certified
individual or agency will void the warranty, and may result in a non-airworthy
installation.

Oct 13, 2004 Page 2-1

ENG-FORM: 805-0104.DOT

PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.