Northern Airborne Technology AMS50 User Manual

SM50

AMS50-000
Stereo Audio Panel with Marker

INSTALLATION AND OPERATION MANUAL

REV 4.00 November 12, 2003

Northern Airborne Technology Ltd.

1925 Kirschner Road
Kelowna BC, Canada

V1Y 4N7

Telephone [phone]

Facsimile [phone]

Copyright 2003 by Northern Airborne Technology

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev 4.00 AMS50-000 Stereo Audio Panel with Marker Manual

Performed at factory

Performed at factory

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

1 Jan 18\05 2

2 Mar 20\06 2, 3

Insert any Amendment Instruction sheets after this page.

Nov 12, 2003 Page ii

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INSTALL_OPS
MANUAL AMENDMENT

Manual: SM50 (AMS50) Amendment #: 2
Document # SM50\Install_Ops\809-0002 Amendment Date: Mar 20, 2006

The purpose of this amendment is to correct the PTT function description and change a
connector reference.

Amendment Instructions:

1

2-9 and 2-10 Rev 4.00 Amendment # 1 2-9 and 2-10 Rev 4.00 Amendment # 2
3-1 and 3-2 Rev 4.00 3-1 and 3-2 Rev 4.00 Amendment # 2

2 Update the Amendment Record sheet at the front of the manual.

3 Insert this page into the manual after the Amendment Record sheet (page ii).

Manual Amendment ends after the following amended pages

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Amendment # 2 Mar 20, 2006 Page 1

ENG-FORM: 809-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

INSTALL_OPS
MANUAL AMENDMENT

Manual: SM50 (AMS50) Amendment #: 1
Document # SM50\Install_Ops\809-0001 Amendment Date: Jan 18, 2005

The purpose of this amendment is to add the Environmental Qualification Form (521-0)
to section 2.5 and to update section 2.3.3 Cable and Wiring statement paragraph 1.

1

2-1, 2-2, 2-9 and 2-10 Rev 4.00 2-1, 2-2, 2-9 and 2-10 Amendment #1 Rev 4.00

2

- AMS50\000\521-0 Rev 1.00

Remove Drawings/Documents (Section 2) Replace or add Drawings/Documents (Section 2)

Note: Ensure that all drawings are inserted in the order shown on the latest drawing lists.

3 Update the Amendment Record sheet at the front of the manual.

4 Insert this page into the manual after the Amendment Record sheet (page ii).

Manual Amendment ends after the following amended pages

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Amendment #1 Jan 18, 2005 Page 1

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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev 4.00 AMS50-000 Stereo Audio Panel with Marker Manual

Table of Contents

Section Title Page

1.0 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

1.4.4 Certification 1-4

1.5 Unit Nomenclature 1-5

1.5.1 Marker Beacon 1-5

1.5.2 Special Features 1-5

1.5.3 Cosmetic Differences 1-5

2.0 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 Accessories Supplied 2-3

2.3.5 Mechanical Installation 2-4

2.3.6 Installation Options and Features 2-5

2.3.7 Adjustments 2-7

2.3.8 Post-Installation Checks 2-9

2.4 Continued Airworthiness 2-10

2.5 Installation Drawings 2-10

Nov 12, 2003 Page iii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev 4.00 AMS50-000 Stereo Audio Panel with Marker Manual

3.0 Operation

3.1 Introduction 3-1

3.2 Controls and Indicators 3-1

3.2.1 Transmit Operation 3-1

3.2.2 Receive Functions 3-2

3.2.3 ICS Functions 3-3

3.2.4 Speaker and Test Buttons 3-4

3.2.5 ICS and VOX Volume Control 3-5

3.2.6 Marker Beacon 3-6

3.2.7 Automatic Fail-safe 3-6

3.2.8 Optional Features 3-7

3.3 Start-Up Selections 3-7

Nov 12, 2003 Page iv

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev. 4.00 AMS50-000 Stereo Audio Panel Manual

Section 1.0 Description

1.1 Introduction

This manual contains information on the AMS50-000 Stereo Audio Panel.

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

1.2 Purpose of Equipment

The AMS50-000 is a full-function stereo audio panel with a six-place, voice-activated
(VOX) intercom and an optional built-in Marker Beacon receiver. The front panel
controls feature clean responsive switching for crucial audio management. Transmitter
and receiver selections are quick and precise using soft touch push-buttons. Positive
feedback is provided in two formats: tactile and visual (colored LED's).

1.3 Features

Radio functions include independently selectable transmit capability for Pilot and Co-pilot
on 3 COM radios. Pilot’s transmit selection also has remote capability (yoke or cyclic).
Receive audio selections include: COM1, COM2, COM3, MKR, NAV1, NAV2, DME and
AUX. COM3 is configurable at time of installation for use with an aviation phone.

The built-in six-place VOX intercom system with ALL, CREW, and PLT ISO modes,
features NAT’s Active Noise Filtering (ANF) system. This advanced technology filters
out unwanted ambient noise entering the intercom channel, thus better isolating the
human voice. Clear, clean intercom communications result in a safer and more
comfortable flight.

Wind, engine and other fatigue noises are significantly reduced within the intercom
system by utilizing independent microphone circuits. By ‘turning on’ only the active
microphone, internal communications are quieter and less stressful.

Protection circuits help to prevent accidental damage from overvoltage and reverse
voltage conditions.

Accommodation is provided for two (2) direct unswitched inputs for functions such as
telephone ringer, Rad Alt, GPS alerts, and an Option Select input controls firmware
related functions (i.e. Karaoke).

Automatic fail-safe operation is provided in the event of a power failure. The Pilot is
routed directly to COM1 and the unswitched direct audio inputs. This mode can also be
manually selected using the OFF (EMG) switch (see section 3.2.5.3 of this manual.)

Nov 12, 2003 Page 1-1

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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AMS50-000 Stereo Audio Panel Manual SM50 Rev. 4.00

1.4 Specifications

1.4.1 Electrical Specifications

Power Supply

Input voltage: 11-33 Vdc @ 3.0 A max. (one input for both)

Note: For emergency voltages below 11 Vdc, the
Manual Fail-safe mode must be used.

Internal supply: ± 8 Vdc for ICS and music to phones,
+ 12 Vdc for speaker and front panel lighting
+ 5 Vdc for logic circuitry

Nominal Lighting Voltage: 27.5 Vdc @ 10 mA max

two separate inputs

13.8 Vdc @ 10 mA max

Input Signals

Microphone: 6 inputs, 250 mVrms into 150 Ω (Fixed)

Receive Audio: 3 COM inputs , 5 NAV inputs. (COM3

configurable for use with aviation phone).

2.5 Vrms into 510 Ω (Fixed)

RX detection: 50 mVrms min

Sidetone Level: 2 mW (1 Vrms) min into 510 Ω

Keylines: Two TX keys (Pilot and Co-pilot).

Music input: Stereo input, switchable between portable

cassette/CD player or rack mounted CD player.

Portable Cassette or CD: 400 mVrms (Nominal) into 610 Ω

250 mVrms to 700 mVrms

Rack mounted CD Player: 2.5 Vrms (Nominal) into 3.5 kΩ

1.0 Vrms to 4.5 Vrms

Output Signals

Headphones: 6 stereo outputs, at full volume, > 70 mW into 300 Ω,

< 10% THD each side. (> 100 mW into 150 Ω).

ICS Volume Range: 40 ± 5 dB

Radio Audio Adjustments: Controlled at each radio source.

Speaker: Adjustable: 0-7 W into 4 Ω @ 27.5 Vdc supply
0-3.5 W into 4 Ω @ 13.8 Vdc supply

COM MIC 3 outputs @ 250 mVrms into 150 Ω each,

controlled by either PLT or CPLT.

PA MIC 1 output @ 250 mVrms into 150 Ω, controlled

by either PLT or CPLT.

Page 1-2 Nov 12, 2003

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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev. 4.00 AMS50-000 Stereo Audio Panel Manual

Performance/Function

TSO-C50c RTCA DO-170 Class II

Rated Output Power 40 mW into 300 Ω (each phone channel)

Rated Speaker Output Power 7 W into 4 Ω (3.5 W into 8 Ω)
2 W into 4 Ω @ 13.8 Vdc power

Audio freq. response:
Receive < 3 dB from 350 - 6000 Hz
Intercom < 3 dB from 350 - 3000 Hz
Music < 3 dB from 50 - 15000 Hz
Speaker < 3 dB from 450 – 6000 Hz

Distortion: < 10% at rated power

Input - Input crosstalk: > 30 dB

Input - Output crosstalk: > 50 dB

Input - Mic crosstalk: < 1.0 mVrms

Audio noise: < -50 dB

Output Regulation: < 3 dB output power variance < 10% THD

Audio Communication: Loud & Clear

ICS Volume controls: 40 ± 5 dB

Receive Input impedance: 510 Ω ± 5%

Mic Input impedance: 150 Ω ± 5%

Music Input impedance: 610 Ω ± 5% and 3.5 kΩ ± 10%

Marker Beacon

TSO-C35d Class A

Receiver Frequency: 75 MHz

Sensitivity:
Lo 1000 µV

Hi 200 µV

Selectivity: 6 dB (min.) @ ± 10 kHz
40 dB (max.) @ ± 200 kHz

Input Impedance: 50 Ω (ohm)

Lamp Output: 400 Hz Blue indicator marked ‘O’ (Outer)
1300 Hz Amber indicator marked ‘M’ (Middle)

3000 Hz White indicator marked ‘A’ (Airways)

External lamps: Active Lo 125 mA max. sink current.

Nov 12, 2003 Page 1-3

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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AMS50-000 Stereo Audio Panel Manual SM50 Rev. 4.00

Middle Marker sense: Active Hi (4.5 Vdc) during Middle Marker

acquisition, for autopilot.

Audio level: Phones audio level side adjustable: 0.5 - 2.5 Vrms.

Distortion: <30% (Input signal from receiver threshold to 50 mV.)

1.4.2 Physical Specifications

Enclosure size behind panel:
Height 1.13” (28.7 mm) max.
Length 6.70” (170.2 mm) max.
Width 6.25” (158.8 mm) max.

Weight 2 lb. (909 g)

Mounting Tray mount with center securing rod - 3/32” hex

(Allen) key.

Connectors 44-pin card edge connectors. Crimp contacts

#18-22 AWG and #22-26 AWG gold plating
over nickel plate.

Material/Finish

Chassis & Cover Brushed aluminum with chromate conversion.

Tray Stainless Steel

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, Crash Safety 6g, 20g

DO-138 [Z]

RTCA DO-160D Env. Cat. [A1D1]-BAB[(SBM)(UF)]XXXXXXABABA[( ]MXXXX. )TTX

1.4.4 Certification

Audio Selector Panels and Amplifiers: RTCA DO-170, Class II

RTCA DO-160D

Airborne Radio Marker Receiver: RTCA DO-143, Class A

RTCA DO-138, DO-160D

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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM50 Rev. 4.00 AMS50-000 Stereo Audio Panel Manual

1.5 Unit Nomenclature

Variants of the AMS50 series Stereo Audio Panel will be covered by manual

supplements to be inserted in Section 8 (Supplements) of this manual, and are

identified as follows:

AMS50 - 000

1.5.1 Marker Beacon

The digit in the first position of the unit suffix indicates the Marker Beacon Capabilities.

Marker Beacon Capabilities

Special Features

Cosmetic Differences

AMS50 - 000

0 = Marker Beacon Capabilities
1 = No Marker Beacon Capabilities

1.5.2 Special Features

The digit in the second position of the unit suffix indicates any special features installed.

AMS50 - 000

0 = No Special Features
Other = Special Features (see relevant supplement for details.)

1.5.3 Cosmetic Differences

The digit in the third position of the unit suffix indicates Cosmetic Differences.

AMS50 - 000

0 = Black faceplate with silver crown
1 = Black faceplate with black crown
Other = Other cosmetic differences (see relevant supplement for

details.)

End of section 1.0

Nov 12, 2003 Page 1-5

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