Nat DA80-001 Operating instructions

Brand: Nat

Model: DA80-001

Category: Musical Equipment

Type: Operating instructions

This manual is also suitable for

DA80-010

Nat DA80-001 is a voice-activated Digital Intercom system providing full transmit and intercom capabilities for the pilot, copilot, and up to two passengers. It accepts stereo music input from a portable or fixed entertainment system to produce high-quality mono-headset output. Music is fully muted during any audible radio or ICS (Intercom) operation and gradually returns after that operation. The priority transmission feature allows the pilot to override the copilot.

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57

DA80 Series

DigiVOX™

Digital Intercom

INSTALLATION AND OPERATION MANUAL

REV 4.10 October 13, 2004

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone (250) 763-2232

Facsimile (250) 762-3374

UTO PTT

DA80-001

DA80-010

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

Oct 13, 2004 Page ii

ENG-FORM: 823-0100.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

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

Entered

Entered By

Insert any Amendment Instruction sheets after this page.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

Oct 13, 2004 Page iii

ENG-FORM: 823-0100.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

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

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 co-

pilot 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

reverse and over voltage protection. Short

circuit protected by internal fuse.

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

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.

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10

2.3 Installation Procedures

2.3.1 Warnings

Do not bundle any lines from this unit with transmitter coax lines. Do not bundle any

audio or DC power lines from this unit with 400 Hz synchro wiring or AC power lines. Do

not position this unit or wiring from this unit next to any device with a strong alternating

magnetic field such as an inverter, or significant audio interference will result.

2.3.2 Cautions

In all installations, use shielded cable exactly as shown and ground as indicated.

Significant ground loop and noise problems may result from not following these guidelines.

Ensure that the chassis is grounded to provide proper shield terminations.

Ensure the microphone and headphone jacks are isolated from the airframe ground.

Use caution when routing microphone wiring, as it carries low-level signals prone to

coupling from other sources.

Do not take a ground from the instrument panel or similar location that shares a ground

return with a turn and bank, horizon or other motor driven instrument. This may cause

the unit to pick up the sound of the motor as ground loop interference.

2.3.3 Notes

The DA80 DigiVOX™ is designed to be used in place of the AA80-001 InterVOX™ unit.

If installing this unit into an existing aircraft harness, ensure that the harness connector

does not have the ‘tabs’ shown in figure 1. If the harness connector does have ‘tabs’,

replace the existing harness connector with the one included in the install kit.

Tab

Harness Connector

Figure 1

Page 2-2 Oct 13, 2004

ENG-FORM: 805-0104.DOT

PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

2.3.4 Cabling and Wiring

All unshielded wire should be Tefzel MIL-M-22759 or equivalent. For shielded wire

applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves (for shield

terminations) to make the most compact and easily terminated interconnect. Follow the

wiring diagrams in Section 2.6 as required.

Group the mic audio shields

separately from all other audio

shields.

Utilizing Raychem solder sleeves,

create up to 6 shield pigtails in the

wiring harness, as shown in the

Interconnect Diagram

(DA80\xxx\403-0, Rev 1.00 or

higher, where xxx represents the

model of the unit under

consideration). Each pigtail

should be no more than 3.0" long.

Bring the pigtails through the

rubber grommet and strip off 0.5"

of insulation.

Bend the stripped portion back

onto the grommet as shown and

sandwich the pigtails between the

connector hood and the grommet.

Raychem

Solder Sleeves

Rubbe

Grommet

Stripped

Pigtail

Metal Hood

Note: The hood is a ‘two-piece’ unit, and is assembled after the wiring is complete.

All wiring should be at least 24 AWG, except power and ground lines, which should be

at least 20 AWG. Ensure that all ground connections are clean and well secured.

To prevent system failure or inadequate equipment protection, supply power from a

dedicated 2.0 A circuit breaker.

Oct 13, 2004 Page 2-3

ENG-FORM: 805-0104.DOT

PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10

2.3.5 Installation Options

The DA80 DigiVOX™ is designed to be used in place of the AA80-001 InterVOX™ unit.

When using a portable cassette/CD player with the DA80, NAT recommends that the

phone output should be used for interface to increase tone control and volume. (The

‘line out’ output lacks volume and tone control.) Set the volume about half way.

CAUTION

Certain aircraft installations may use a car type, am/fm cassette or CD

player. If it is necessary to use the ‘speaker’ outputs from the stereo

unit, a floating ground adapter and input attenuation network (resistors)

may be required to provide the correct system interconnect and to

prevent damage to the music input(s) of the DA80.

2.3.6 Adjustments

The unit ships from the factory with all internal adjustments set to the normal test levels.

Once installed in the aircraft, it may be desirable to change some of these settings to

best suit the local operating environment. The internal adjustments are located along

the left side of the unit and are as follows:

CAUTION

Before performing the following adjustments ensure the aircraft radio’s

volume control is set to produce 2.5 Vrms ±10 % at the input to the

DA80, or the mute functions may not operate correctly.

2.3.6.1 RECEIVE LEVEL

The setting can be adjusted by potentiometer RECEIVE LEVEL. The setting cannot be

fully muted. The cw rotation of this control will increase Receive audio input level.

2.3.6.2 TX LEVEL

The setting can be adjusted by potentiometer TX LEVEL. The setting cannot be fully

muted. The cw rotation of this control will increase TX Mic output signal level.

2.3.6.3 MUSIC LEVEL

The setting can be adjusted by potentiometer MUSIC LEVEL. The setting cannot be

fully muted. The cw rotation of this control will increase music audio volume level.

Page 2-4 Oct 13, 2004

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PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

2.3.7 Mechanical Installation

The DA80 Digital Intercom can be installed in any attitude, using the DA80-IKC

Installation kit (refer to Section 2.5 for details).

For proper installation, refer to Mounting Diagram (DA80\xxx\920-0, where xxx

represents the model of the unit under consideration) and the following steps:

a) Before proceeding to install the DA80 into the aircraft, secure the black metal

faceplate to the DA80 with one mounting screw (countersink holes facing out).

b) Remove the desired label from the sheet provided and using minimum pressure

align the label on the black faceplate. When the alignment is correct remove the

faceplate from the unit.

c) Lay the faceplate on a flat surface and press label firmly in place ensuring there

are no air bubbles.

d) Referencing the drill template, drill required mounting holes in the aircraft panel

and insert the DA80 from behind the panel.

e) Attach the black metal faceplate (with label attached) from the front, with the

countersunk holes facing out. Secure with the mounting screws provided.

Note: Ensure that the aircraft panel is tightly ‘sandwiched’ between the DA80

and faceplate.

f) Rotate the shaft of the VOX potentiometer fully ccw. Align the white marker on

the knob (part of 40-21-VOX2) to the LIVE position on the faceplate label. Using

a 0.05" Allen key, tighten the knob onto the potentiometer shaft.

g) Using a 0.05" Allen key, loosely attach the knob (part of 40-21-ICS2) onto the

ICS VOL potentiometer shaft. Rotate the shaft of the ICS VOL potentiometer

fully ccw. Using the Allen key, loosen the knob on the potentiometer shaft and

align the white marker on the knob (part of 40-21-ICS2) to the MIN. position on

the faceplate label. Using the Allen key, tighten the knob onto the potentiometer

shaft.

Oct 13, 2004 Page 2-5

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PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10

2.3.8 Post-Installation Checks

2.3.8.1 Voltage/resistance checks

Do not attach the DA80 until the following conditions are met.

Check the following:

a) Check P101, pin <1> for +12 to 30 Vdc relative to ground.

b) Check P101, pin <14> for continuity to ground (less than 0.5 Ω).

c) For the DA80-010 only, check P101, pin <25> for continuity to ground (less than

0.5 Ω) when the ICS KEY is activated.

2.3.8.2 Power On checks

Install the DA80 and power up the aircraft’s systems. Verify normal operation of all

functions. Refer to Section 3 for specific operation details.

a) Begin with only the pilot's headset installed, no hand mic. Check for correct radio

operation (both receive and transmit) and ICS operation. Check yoke (or cyclic)

switch action.

b) If there is a music source in the system turn it on and verify that music is heard in

all modes except PLT ISO. Check for proper mute operation.

Note: Unusual buzzes, hums or other background audio are symptomatic of

multiple grounds, or noisy external systems such as blowers or pumps

sharing wiring with the audio system. Failure to key or correctly modulate

a transmitter is often the result of forgetting to connect all required

grounds to the radio or external audio system.

c) Plug in the copilot's headset. Check for correct radio and ICS operation. Check

pilot's transmit priority. Check yoke or cyclic switch functions, if applicable.

d) Plug in the hand mic, and test for correct operation in all modes. It must activate

the transmitter(s) in all cases.

e) Plug in any remaining headsets, and check for correct ICS operation.

Note: Incorrect jack wiring is a common fault for rear passenger stations, and

may cause a wide range of problems.

f) To verify proper operation, all functions and levels should be checked in-flight.

Upon satisfactory completion of all performance checks, make the required log

entries and complete the necessary Regulatory Agency paperwork before

releasing the aircraft for service.

Page 2-6 Oct 13, 2004

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PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM57 Rev. 4.10 DA80 Series DigiVOX™ Digital Intercom Manual

2.4 Continued Airworthiness

Maintenance of the DA80 DigiVOX™ Digital Intercom is ‘on condition’ only. Periodic

maintenance of this product is not required.

2.5 Accessories Required

An installation kit is required to complete the installation. The DA80-IKC (crimp) is

supplied with the unit, and consists of the following:

DA80-IKC (crimp)

Quantity Description NAT Part #

1 Hole Overlay Drill Template 43-10-085

1 Front Label (Lexan) 43-41-080

1 Rectangular Black Faceplate (Blank) 50-04-851

1 Fluted Knob set (ICS) 40-21-ICS2

1 Fluted Knob set (VOX) 40-21-VOX2

3 CSK Black 6-32 Mounting Screws 25-11-028

1 D-min 25 pin Socket housing 20-21-025

25 MS Crimp Socket 20-26-901

1 Hood, D-min, Metal 20-28-028

2.6 Installation Drawings

DRAWING REV. DESCRIPTION TYPE Serial #’s

DA80-001

DA80\001\403-0 1.00 Digital Intercom Interconnect 1001 and up

DA80\001\405-0 1.00 Digital Intercom Connector Map 1001 and up

DA80\001\905-0 1.00 Digital Intercom Faceplate 1001 and up

DA80\001\920-0 1.00 Digital Intercom Mounting 1001 and up

DA80\001\922-0 1.00 Digital Intercom Mech. Installation 1001 and up

DA80-010

DA80\010\403-0 1.00 Digital Intercom Interconnect 1001 and up

DA80\010\405-0 1.00 Digital Intercom Connector Map 1001 and up

DA80\010\920-0 1.00 Digital Intercom Mounting 1001 and up

DA80\010\922-0 1.00 Digital Intercom Mech. Installation 1001 and up

Section 2 ends after these Drawings

Oct 13, 2004 Page 2-7

ENG-FORM: 805-0104.DOT

PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.

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Nat DA80-001 Operating instructions

Brand: Nat

Model: DA80-001

Category: Musical Equipment

Type: Operating instructions

This manual is also suitable for

DA80-010

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Nat DA80-001 Operating instructions

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Nat DA80-001 Operating instructions

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