Honeywell KTR2280A Licensed Non-Broadcast Aeronautical Transmitter User Manual System Installation Manual

Honeywell International Inc.

23500 West 105th Street

Olathe, Kansas 66061-8425

U.S.A.

CAGE: 22373

Telephone: 800-601-3099 (Toll Free U.S.A./Canada)

Telephone: 602-365-3099 (International Direct)

Website: www.myaerospace.com

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Publication Number D201610000049, Revision 0 Initial 15 May 2017

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ECCN: 7E994.

System Installation Manual

KTR 2280A Multi-Mode Digital Radio

Part Number CAGE

069-01039-0101 22373

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WARNING: INCORRECTLY REPAIRED COMPONENTS CAN AFFECT AIRWORTHINESS OR DECREASE

THE LIFE OF THE COMPONENTS. INCORRECTLY FABRICATED SPECIAL TOOLING OR TEST

EQUIPMENT CAN RESULT IN DAMAGE TO THE PRODUCT COMPONENTS OR GIVE UNSATISFACTORY

RESULTS.

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Copyright - Notice

Honeywell is a registered trademark of Honeywell International Inc.

All other marks are owned by their respective companies.

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TRANSMITTAL INFORMATION

THIS IS AN INITIAL RELEASE OF KTR 2280A MULTI-MODE DIGITAL RADIO SIM PUBLICATION No.

D201610000049 ISSUED FOR USE IN SUPPORT OF THE FOLLOWING:

Table TI-1 shows the applicable components.

Revision History

Table TI-2 shows the revision history of this SIM.

Table TI-1. Applicable Components

Component PN Nomenclature

069-01039-0101 KTR 2280A Multi-Mode Digital Radio

Table TI-2. Revision History

Revision Number Revision Date

0 15 May 2017

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RECORD OF REVISIONS

For each revision, write the revision number, revision date, date put in the manual, and your initials in the

applicable column.

NOTE: Refer to the Revision History in the TRANSMITTAL INFORMATION section for revision data.

Revision

Number Revision

Date Date Put

In Manual By Revision

Number Revision

Date Date Put

In Manual By

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RECORD OF TEMPORARY REVISIONS

Instructions on each page of a temporary revision tell you where to put the pages in your manual. Remove

the temporary revision pages only when discard instructions are given. For each temporary revision, put the

applicable data in the record columns on this page.

Definition of Status column: A TR may be active, incorporated, or deleted. “Active” is entered by the holder

of the manual. “Incorporated” means a TR has been incorporated into the manual and includes the revision

number of the manual when the TR was incorporated. “Deleted” means a TR has been replaced by another

TR, a TR number will not be issued, or a TR has been deleted.

Temporary

Revision

Number Status Page

Number Issue

Date Date Put in

Manual By

Date

Removed

From Manual By

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Subheading and Page Date Subheading and Page Date

LIST OF EFFECTIVE PAGES

* indicates a changed or added page.

F indicates a foldout page.

Title

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Transmittal Information

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Record of Revisions

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Record of Temporary Revisions

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List of Effective Pages

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Table of Contents

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Introduction

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Section 1 - General Information

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Subheading and Page Date Subheading and Page Date

* indicates a changed or added page.

F indicates a foldout page.

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Section 3 - Operation

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Appendix A - Environmental

Qualification Forms

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TABLE OF CONTENTS

INTRODUCTION

1. How to Use This Manual ................................................................................................INTRO-1

A. General.............................................................................................................................INTRO-1

B. Observance of Manual Instructions ..................................................................................INTRO-1

C. Symbols............................................................................................................................INTRO-1

D. Units of Measure...............................................................................................................INTRO-2

E. Standard Practices Manual...............................................................................................INTRO-2

F. Electrostatic Discharge .....................................................................................................INTRO-2

2. Customer Support ..........................................................................................................INTRO-2

A. Honeywell Aerospace Online Technical Publications Website.........................................INTRO-2

B. Honeywell Aerospace Contact Team ...............................................................................INTRO-2

3. References ......................................................................................................................INTRO-2

A. Honeywell/Vendor Publications ........................................................................................INTRO-2

B. Other Publications ............................................................................................................INTRO-2

4. Acronyms and Abbreviations........................................................................................INTRO-3

A. General.............................................................................................................................INTRO-3

SECTION 1

GENERAL INFORMATION

1.1 INTRODUCTION .......................................................................................................................1-1

1.2 EQUIPMENT DESCRIPTION....................................................................................................1-1

1.3 TECHNICAL CHARACTERISTICS...........................................................................................1-1

1.3.1 KTR 2280A Technical Characteristics .......................................................................................1-1

1.3.2 KA 44B Technical Characteristics .............................................................................................1-3

1.4 UNITS AND ACCESSORIES SUPPLIED.................................................................................1-3

1.4.1 KTR 2280A Installation Kit.........................................................................................................1-3

1.5 ACCESSORIES REQUIRED, BUT NOT SUPPLIED................................................................1-6

1.6 LICENSING REQUIREMENTS .................................................................................................1-6

1.7 CONTINUED AIRWORTHINESS INSTRUCTIONS..................................................................1-6

1.7.1 Equipment..................................................................................................................................1-6

1.7.2 Wires and Coaxial Cables .........................................................................................................1-7

1.8 ANTENNA RF EXPOSURE ......................................................................................................1-7

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SECTION 2

INSTALLATION

2.1 GENERAL INFORMATION.......................................................................................................2-1

2.2 UNPACKING and INSPECTING EQUIPMENT ........................................................................2-1

2.3 EQUIPMENT INSTALLATION..................................................................................................2-1

2.3.1 Avionics Cooling Requirements................................................................................................. 2-1

2.3.2 Equipment Location................................................................................................................... 2-1

2.3.2.1 Mounting Tray Location(s).........................................................................................................2-2

2.3.2.2 Antenna(s) ................................................................................................................................. 2-2

2.3.3 KTR 2280A Mechanical Installation...........................................................................................2-2

2.3.4 Antenna Mechanical Installation................................................................................................ 2-3

2.3.4.1 VHF COM Antennas..................................................................................................................2-3

2.3.4.2 NAV Antennas ...........................................................................................................................2-4

2.3.4.3 ADF Antennas ........................................................................................................................... 2-4

2.3.5 KTR 2380A Wiring and Cable Installation ................................................................................. 2.5

2.3.5.1 KTR 2280A Interconnection and Cable Harness Fabrication.................................................... 2-5

2.3.5.2 Taylor Backshell Instructions................................................................................................... 2-10

2.3.5.3 Primary Power and Circuit Breaker Requirements..................................................................2-19

2.3.5.4 Connectors ..............................................................................................................................2-19

2.3.5.5 Crimp Tool Information ............................................................................................................2-22

2.4 POST-INSTALLATION CHECKS ...........................................................................................2-45

2.4.1 KTR 2280A MMDR Post-Installation Inspection and Ground Test..........................................2-45

2.4.1.1 Inspection ................................................................................................................................ 2-45

2.4.1.2 Ground Tests...........................................................................................................................2-46

2.4.2 KTR 2280A Post-Installation Flight Tests................................................................................ 2-48

2.4.2.1 COM Transceiver Flight Test................................................................................................... 2-48

2.4.2.2 NAV Receiver Flight Test ........................................................................................................2-48

2.4.2.3 ADF Receiver Flight Test......................................................................................................... 2-49

2.5 KTR 2280A INSTALLATION PARAMETER MODIFICATIONS...............................................2-49

2.6 ARINC 429 Interface................................................................................................................ 2.50

SECTION 3

OPERATION

3.1 GENERAL .................................................................................................................................3-1

3.1.1 VHF COM Controls and Displays ..............................................................................................3-1

3.1.2 VHF NAV Controls and Displays ............................................................................................... 3-2

3.1.3 ADF Controls and Displays........................................................................................................ 3-2

3.1.4 VDL Mode A and VDL Mode 2 ..................................................................................................3-2

APPENDIX A

ENVIRONMENTAL QUALIFICATION FORMS

APPENDIX B

DEVIATIONS

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LIST OF FIGURES

Figure INTRO-1 Symbols ...........................................................................................................INTRO-1

Figure 2-1 Quadrex Cable Preparation ......................................................................................2-6

Figure 2-2 Quadrex Cable Preparation ......................................................................................2-6

Figure 2-3 Quadrex Cable Preparation ......................................................................................2-7

Figure 2-4 Quadrex Cable Preparation ......................................................................................2-7

Figure 2-5 Quadrex Cable Preparation ......................................................................................2-7

Figure 2-6 Quadrex Cable Preparation ......................................................................................2-8

Figure 2-7 Quadrex Cable Preparation ......................................................................................2-8

Figure 2-8 Quadrex Cable Preparation ......................................................................................2-8

Figure 2-9 Quadrex Cable Preparation ......................................................................................2-9

Figure 2-10 Quadrex Cable Preparation ......................................................................................2-9

Figure 2-11 Connector Assembly...............................................................................................2-10

Figure 2-12 Taylor Backshell Instructions ..................................................................................2-11

Figure 2-13 Backshell Assembly Exploded View .......................................................................2-12

Figure 2-14 Assembly Details ....................................................................................................2-13

Figure 2-15 Assembly Details ....................................................................................................2-14

Figure 2-16 Shield Braid Routing and Clamping Details............................................................2-15

Figure 2-17 Securing Strain Relief Clamp..................................................................................2-16

Figure 2-18 Right Angle Connector Instruction Sheet................................................................2-17

Figure 2-19 KTR 2280A Mating Connector................................................................................2-19

Figure 2-20 KA 44B Mating Connector ......................................................................................2-21

Figure 2-21 KTR 2280A Installation Drawing.............................................................................2-23

Figure 2-22 KA 44B Outline and Mounting Drawing, PN 155-05334-0000 ...............................2-31

Figure 2-23 KA 44B Outline and Mounting Drawing, PN 155-05334-0010................................2-33

Figure 2-24 KTR 2280A Interconnect Diagram..........................................................................2-35

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LIST OF TABLES

Table 1-1 KTR 2280A Technical Characteriestics .................................................................... 1-2

Table 1-2 KA 44B Technical Characteristics ............................................................................1-3

Table 2-1 KTR 2280A Backshell Hardware ............................................................................ 2-12

Table 2-2 J1 Pin Functions .....................................................................................................2-19

Table 2-3 Antenna Connector Functions ................................................................................2-21

Table 2-4 KA 44B Pin Functions.............................................................................................2-22

Table 2-5 Crimp Tools and Accessories .................................................................................2-22

Table 2-6 Inspection/Check Procedure................................................................................... 2-45

Table 2-7 Unit Parameters......................................................................................................2-49

Table 2-8 ARINC 429 Output Labels ...................................................................................... 2-50

Table 2-9 ARINC 429 Input Labels ......................................................................................... 2-51

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INTRODUCTION

1. How to Use This Manual

A. General

(1) This publication gives maintenance instructions for the equipment shown on the Title page.

(2) Standard maintenance procedures that technicians must know are not given in this manual.

(3) This publication is written in agreement with the ATA Specification.

(4) Warnings, cautions, and notes in this manual give the data that follows:

• A WARNING gives a condition or tells personnel what part of an operation or

maintenance procedure, which if not obeyed, can cause injury or death

• A CAUTION gives a condition or tells personnel what part of an operation or maintenance

procedure, which if not obeyed, can cause damage to the equipment

• A NOTE gives data, not commands. The NOTE helps personnel when they do the related

instruction.

(5) Warnings and cautions go before the applicable paragraph or step. Notes follow the

applicable paragraph or step.

B. Observance of Manual Instructions

(1) Make sure that you carefully obey all safety, quality, operation, and shop procedures for the

unit.

(2) All personnel who operate equipment and do maintenance specified in this manual must

know and obey the safety precautions.

C. Symbols

(1) The symbols and special characters are in agreement with IEEE Publication 260 and IEC

Publication 27. Special characters in text are spelled out.

(2) The signal mnemonics, unit control designators, and test designators are shown in capital

letters.

(3) The signal names followed by an “*” show an active low signal.

(4) The symbols in Figure INTRO-1 show ESDS and moisture sensitive devices.

Figure INTRO-1. (Sheet 1 of 1) Symbols

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D. Units of Measure

(1) Measurements, weights, temperatures, dimensions, and other values are expressed in the

USMS followed by the appropriate SI metric units in parentheses. Some standard tools or

parts such as drills, taps, bolts, nuts, etc. do not have an equivalent.

E. Standard Practices Manual

(1) Not applicable.

F. Electrostatic Discharge

(1) Touch the items susceptible to electrostatic discharge in accordance with MIL-HDBK-263.

Refer to MIL-STD-1686 for definition of the standards and conditions.

2. Customer Support

A. Honeywell Aerospace Online Technical Publications Website

(1) Go to the Honeywell Online Technical Publications Website at (www.myaerospace.com).

• To download or see publications online

• To order a publication

• To tell Honeywell of a possible data error in a publication.

B. Honeywell Aerospace Contact Team

(1) If you do not have access to the Honeywell Technical Publications Website, or if you need to

speak to personnel about non-Technical Publication matters, the Honeywell Aerospace

Contact Team gives 24/7 customer service to Air Transport & Regional, Business & General

Aviation, and Defense & Space customers around the globe.

• Telephone: 800-601-3099 (Toll Free U.S.A./Canada)

• Telephone: 602-365-3099 (International).

3. References

A. Honeywell/Vendor Publications

(1) Honeywell publications related to the content of this manual are shown in the list that follows:

• Not applicable.

B. Other Publications

(1) These publications are standard references. Check for latest version of publication.

• The United States GPO Style Manual 2000 (aavailable at

http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/content-detail.html)

• IEEE Std 260, Standard Letter Symbols for Units of Measurement (available from the

American National Standards Institute at http://www.ansi.org)

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• ASME Y14.38, Abbreviations for Use on Drawings and in Text (available from the

American National Standards Institute at http://www.ansi.org)

• ANSI/IEEE Std 91, Graphic Symbols for Logic Functions (available from the American

National Standards Institute at http://www.ansi.org)

• CAGE codes and manufacturers' addresses are available at https://cage.dla.mil

• IEEE 315/ANSI Y32.2, Graphic Symbols for Electrical and Electronics Diagrams

(available from the American National Standards Institute at http://www.ansi.org)

• MIL-HDBK-263, Electrostatic Discharge Control Handbook for Protection of Electrical

and Electronic Parts, Assemblies and Equipment (Excluding Electrically Initiated

Explosive Devices) (Metric) (available from any military standards database)

• MIL-STD-1686, Electrostatic Discharge Control Program for Protection of Electrical and

Electronic Parts, Assemblies and Equipment (Excluding Electrically Initiated Explosive

Devices) (Metric) (available from any military standards database).

4. Acronyms and Abbreviations

A. General

(1) The abbreviations are used in agreement with ASME Y14.38.

(2) Acronyms and non-standard abbreviations used in this publication are as follows.

List of Acronyms and Abbreviations

Term Full Term

ACARS aircraft communications addressing and reporting system

ADF automatic direction finder

AM amplitude modulation

ANSI American National Standards Institute

ANT antenna

AOA angle of attack

APM aircraft personality module

ARINC Aeronautical Radio, Incorporated

ASME American Society of Mechanical Engineers

ATA Air Transport Association

ATN aeronautical telecommunication network

AVLC aviation link control

BFO beat frequency oscillator

BIT built-in test

CAGE commercial and government entity

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SYSTEM INSTALLATION MANUAL

KTR 2280A

CPDLC controller/pilot data link communications

CFR Code of Federal Regulations

CMC central maintenance computer

CMF communications management function

CMM component maintenance manual

COM communication

dB decibel

dBm decibel (referenced to one milliwatt)

DEG degree

DME distance measuring equipment

EB engineering bulletin

ECCN export control classification number

ELT emergency locator transmitter

ESDS electrostatic discharge sensitive

ETSO European Technical Standard Order

FAA Federal Aviation Administration

FCC Federal Communications Commission

GMT Greenwich mean time

GND ground

GPO Government Printing Office

GRY grey

GS glidescope

HIRF high intensity radiated fields

Hz hertz

IEC International Electrotechnical Commission

IEEE Institute of Electrical and Electronics Engineers

ILS instrument landing system

kHz kilohertz

KTR king transceiver radio

LOC localizer

LRU line replaceable unit

mA milliampere

List of Acronyms and Abbreviations (Cont)

Term Full Term

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SYSTEM INSTALLATION MANUAL

KTR 2280A

MHz megahertz

MIC microphone

MIL military

MMDF multi-mode digital function

MMDR multi-mode digital receiver

MMDS multi-mode digital sensor

MNT mount

MOPS minimum operational performance standards

NAV navigation

NDB non-directional beacon

No. number

PGM program

PN part number

POA plain old aircraft communications addressing and reporting system

PTT push-to-talk

PWR power

QE quadrantal error

REV revision

RF radio frequency

RTCA Radio Technical Commission for Aeronautics

RX receiver

SIM system installation manual

SNR signal-to-noise ratio

STC supplemental type certificate

TC type certificate

TSO technical standard order

TX transmiter

UTC universal time coordinated

VAC volts alternating current

VDC volt direct current

VHF very high frequency

VOR very high frequency omnidirectional range

List of Acronyms and Abbreviations (Cont)

Term Full Term

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SYSTEM INSTALLATION MANUAL

KTR 2280A

VSWR voltage standing wave ratio

Wwatt

List of Acronyms and Abbreviations (Cont)

Term Full Term

SYSTEM INSTALLATION MANUAL

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SECTION 1

GENERAL INFORMATION

1.1 INTRODUCTION

This manual contains information relative to the physical, mechanical, and electrical characteristics of the

Honeywell KTR 2280A MMDR. Installation and check out procedures are also included. Information relative to

the maintenance, alignment, and procurement of the replacement parts may be found in this KTR 2280A CMM,

Publication No. D201610000050. Final design of the installation and airworthiness approval is incumbent upon

the installer and their respective certification authority.

1.2 EQUIPMENT DESCRIPTION

The KTR 2280A MMDR Transceiver is a blind panel mounted integrated transceiver containing one transmitter

and six receivers. Depending on system configuration, all six receivers can be simultaneously active. The KTR

2280A will operate from a normal voltaqe of 27.5 VDC. The KTR 2280A is designed with ARINC 429 interfaces

which is intended for use in the aircraft. It is also designed with RS-422 capabilities that will be used primarily

for development and testing in the engineering lab. The KTR 2280A is controlled by other LRUs which will

send control information to the KTR 2280A through ARINC 429 data. Some outputs from the KTR 2280A are in

digital formats and sent to other LRUs through ARINC 429. Other outputs are more traditional analog outputs.

The six receivers and their modes of operation are as follows, The NAV receiver operates in one of three

modes as dynamically controlled by the system interface. These three modes are VOR, LOC, and VDB. The

GS operates in the Glideslope mode only. The ADF operates in the direction finding and AM modes. There are

three COM receivers. The first COM is a traditional AM mode receiver with either 25 or 8.33 kHz channel spac-

ing. The second AM COM receiver functions as a Guard channel receiver with either 25 or 8.33 kHz channel

spacing. The third COM receiver is capable of receiving either VDL Mode 2 (D8PSK) or VDL Mode A (MSK)

signals. The COM transmitter is capable of AM, VDL Mode 2, or VDL Mode A modes.

The KTR 2280A contains BIT equipment so that the operational health of the unit is constantly monitored. When

a critical fault is detected, the unit notifies the host system. The unit stores detected failures in non-volatile

memory for later review. The unit also has a temperature sensor and a timer so that faults can be time stamped

and temperature data can be collected and stored.

1.3 TECHNICAL CHARACTERISTICS

1.3.1 KTR 2280A Technical Characteristics

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Table 1-1 KTR 2280A Technical Characteristics

SPECIFICATION CHARACTERISTIC

TSO COMPLIANCE:

COM TRANSMIT TSO-C169a, ETSO-2C169a, DO-186B, ED-23C for

transmitter Class 3 and 5

COM RECEIVE TSO-169a, ETSO-2C169a, DO-186B for receiver Classes

C, D, E, and ED-23C for receiver Classes C, D, E and H2

VOR TSO-C40c, ETSO- 2C40c, DO-196, and ED-22B

LOC TSO-C36e, ETSO-2C36f, DO-195 for receiver Class B, and

ED-46B for automatic landing.

GS TSO-C34e, ETSO-2C34f, DO-192, and ED-47B

ADF TSO-C41d, ETSO-2C41d, DO-179 for Class A, and

ED-51

STUCK MICROPHONE TSO-128a, ETSO-2C128, DO-207, and ED-67

VDB TSO-C162a and DO-253C

VDL MODE 2 TRANSCEIVER TSO-C160a, DO-281B, and ED-92B for Class YF7

TSO/ETSO DEVIATIONS Refer to APPENDIX B

NON-TSO FUNCTIONS

TRANSCEIVER (ACARS) Mode A

SOFTWARE QUALIFICATION DO-178B Level B

HARDWARE QUALIFICATION DO-254 Level B

ENVIRONMENTAL

CATEGORIES Refer to APPENDIX A

PHYSICAL DIMENSIONS Refer to Figure 2-21 KTR 2280A Installation Drawing

WEIGHT Refer to Figure 2-21 KTR 2280A Installation Drawing

MOUNTING Remote rack mounted

TEMPERATURE Refer to APPENDIX A

ALTITUDE Refer to APPENDIX A

COOLING Internal fan and external rack mounted fan

POWER INPUT 16 to 33 VDC (Nominal voltage 27.5 VDC)

POWER REQUIREMENTS

(Note: 100% transmit is specified for short-term

operation only)

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1.3.2 KA 44B Technical Characteristics

Table 1-2 KA 44B Technical Characteristics

1.4 UNITS AND ACCESSORIES SUPPLIED

1.4.1 KTR 2280A Installation Kit

NOTE: The following installation kit information is presented at the revision existing at the time of this

publication. Future revisions to these kits can occur. Use the latest revision of the kit as provided by

Honeywell.

The KTR 2280A installation kit, PN 050-03721-0010, contains the following parts:

RECEIVE (NOMINAL) 19 Watt (0.7 A at 27.5 V)

RECEIVE (NOMINAL) W/10% TRANSMIT 33 Watt (1.19 A at 27.5 V)

RECEIVE (NOMINAL) W/100% TRANSMIT 154 Watt (5.6 A at 27.5 V)

RECEIVE (MAXIMUM) 28 Watt (1.02 A at 27.5 V)

RECEIVE (MAXIMUM) W/10% TRANSMIT 43 Watt (1.57 A at 27.5 V)

RECEIVE (MAXIMUM) W/100% TRANSMIT 179 Watt (6.5 A at 27.5 V)

SPECIFICATION CHARACTERISTIC

TSO COMPLIANCE Refer to APPENDIX A

ENVIRONMENTAL

SPECIFICATIONS Refer to APPENDIX A

PHYSICAL DIMENSIONS Refer to Figure 2-22 and Figure 2-23 for Outline and Mounting

Drawing

WEIGHT: Refer to Figure 2-22 and Figure 2-23 for Outline and Mounting

Drawing

POWER REQUIREMENTS 8.5 ±0.5 VDC at 100 mA max (supplied by

KTR 2280A)

PN DESCRIPTION REV

-------------------------------------------------------------------------------------------------------------------

050-03721-0010 INSTALL KIT KTR 2280A A

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -QTY

---------------------------------------------------------------------------------------------------------------------------------------------------

P1 030-03296-0000 HI DENSITY SUBD44P EA 1.00

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Shield braids must be clamped to the connector backshell using bar clamp assembly, PN 200-10452-0001,

which contains the following parts. Refer to Figure 2-12 Typical Taylor Backshell Instructions and Figure 2-21

KTR 2280A Installation Drawing for additional information.

P101 030-00101-0002 PANEL MOUNT PLUG EA 1.00

P102 030-00101-0002 PANEL MOUNT PLUG EA 1.00

P103 030-00101-0002 PANEL MOUNT PLUG EA 1.00

P104 030-00101-0002 PANEL MOUNT PLUG EA 1.00

J501 57000525-002 FAN, 25 X 25 X 10 mm, 3.5 CFM, TEFLON EA 1.00

001-01299-0000 INSTRUCTION FOR HARNESS ASSEMBLY PARTS RF .00

030-01458-0000 CONTACT, SOCKET, SIZE 22 EA 44.00

030-01466-0003 CONN, D-SUB, CONT, FEM, #22 W/ 20 AWG CRMP

BARREL EA 6.00

047-11179-0004 STAIN RELIEF CLAMP, .220 EA 1.00

047-11310-0004 RACK, W/FINISH EA 1.00

057-05944-0085 KTR 2280A KIT TSO LABEL EA 1.00

073-01140-0003 BACKPLATE W/HARDWARE EA 1.00

073-01141-0002 CONNECTOR HOOD SUB D 25 90 DEG W/FINISH EA 1.00

073-01142-0002 CONN HOOD COVER W/FINISH EA 1.00

076-03189-0001 SCREW 100DEG FHP 2-56 X 3/8 SPECIAL EA 5.00

088-03559-0001 FAN GUARD EA 1.00

089-05874-0011 SCR PHP 2-56 X 11/16 EA 3.00

089-05878-0005 SCR PHP 4-40 X 5/16 EA 1.00

089-05903-0004 SCR PHP 4-40 X 1/4 EA 3.00

089-06008-0004 SCR FHP 4-40 X 1/4 EA 2.00

089-08252-0030 WASHER EA 8.00

090-00019-0007 RING RTNR .438 EA 4.00

091-00464-0002 CABLE TIE, 5.62 INCH EA 1.00

150-00128-0009 TBG HT SHRNK WHT IN 2.00

155-03009-0001 CABLE ASSY, POWER, KTR 2280A FAN EA 1.00

155-06081-0000 INSTALL DRAWING MMDR KTR 2280A RF .00

200-10452-0001 BAR CLAMP ASSEMBLY -15 EA 1.00

PN DESCRIPTION REV

-------------------------------------------------------------------------------------------------------------------

200-10452-0001 BAR CLAMP ASSEMBLY -15 -

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -QTY

---------------------------------------------------------------------------------------------------------------------------------------------------

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The KA 44B antenna installation kit Honeywell PN 050-01756-0020 contains the following parts

The KA 44B antenna cable assembly Honeywell PN 200-02586-0020 contains the following parts

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -0001

---------------------------------------------------------------------------------------------------------------------------------------------------

REF1 -0000 BAR CLAMP ASSEMBLY KMC 2220 RF .00

047-11178-0002 BACKSHELL BAR CLAMP MED EA 1.00

076-03190-0001 SCREW PHP 4-40 X 7/16 SPECIAL EA 2.00

187-01943-0002 BACKSHELL GASKET MEDIUM EA 1.00

PN DESCRIPTION REV

-------------------------------------------------------------------------------------------------------------------

050-01756-0020 INSTALL KIT 48 FT MMDR KA 44B DO-160D C

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -0020

---------------------------------------------------------------------------------------------------------------------------------------------------

030-00101-0000 PANEL MNT PLUG EA 1.00

057-02259-0000 ANT MTG TEMPLATE EA 1.00

057-05944-0074 KA 44B KIT TSO LABEL EA 1.00

076-01042-0001 FERRULE W/F EA 1.00

090-00019-0007 RING RTNR .438 EA 1.00

091-00031-0005 NY CA CLAMP .312 EA 1.00

155-05334-0000 INST DWG KA44B RF 0.00

200-02586-0020 ANT CBL ASSY 48FT KA 44B DO-160D EA 1.00

PN DESCRIPTION REV

-------------------------------------------------------------------------------------------------------------------

200-02586-0020 ANT CBL ASSY 48FT KA 44B DO-160D G

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -0020

---------------------------------------------------------------------------------------------------------------------------------------------------

025-00001-0000 WIRE, HOOKUP, PTFE, 26 (7/34)AWG SPC, BLK IN 3.90

025-05120-0000 WIRE, TIN PLTD CU SHLD, 5-24 (19/36)AWG TPC

COND IN 578.00

026-00029-0000 WIRE, CU, 22AWG, TINNED IN 3.00

030-01157-0011 SOCKET CRMP 20G EA 9.00

030-01171-0000 CONN SUB-D HSG 9S (FEMALE PINS) EA 1.00

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1.5 ACCESSORIES REQUIRED, BUT NOT SUPPLIED

A. Broadband communications antenna (50 ohms)

B . V H F N A V a n t e n n a ( 5 0 o h m s )

C . G l i d e s l o p e a n t e n n a

D . A n t e n n a s p l i t t e r ( s )

E . A D F A n tenna (representative type KA 44B)

T h e K A 4 4 B , P N 0 7 1 - 1 2 3 4 -00/01, is a low profile ADF Antenna which contains both loop and sense

antennas, preamplifiers, and modulators which combine the antenna signals into a single RF signal

which is output to the KTR 2280A through a quadaxial cable of non-critical length. The KA 44B is

supplied with a backing plate (Refer to Figure 2-22 KA 44B Outline and Mounting Drawing for PN

155-05334-0000 and the KA 44B, PN 155-05334-0010 is supplied with a grounding ring (Ref to Fig-

ure 2-23 KA 44B Outline and Mounting Drawing for PN 155-05334-0010).

F . C o n s u m a b l e s :

( 1 ) R T V N o . 3 1 4 5 ( P N 0 1 6 - 0 1 0 8 2 - 0 0 0 0 ) .

( 2 ) A l u m i p r e p N o 3 3 ( P N 0 1 6 - 0 1 1 2 7 - 0 0 0 0 ) .

( 3 ) A l o d i n e N o 1 0 0 1 ( P N 0 1 6 - 0 0 1 2 8 - 0 0 0 0 ) .

( 4 ) D o w C o r n i n g D C - 4 o r e q u i v a l e n t .

1.6 LICENSING REQUIREMENTS

The KTR 2280A meets CFR Title 47, Part 2, 15 and 87 (FCC Approvals) for all radio equipment. For non-US

registered aircraft, follow applicable licensing requirements as required.

This device complies with Industry Canada’s license-exempt RSSs. Operation is subject to the following two

conditions:

• This device cannot cause interference: and

• This device must accept any interference, including interference that can cause undesired operation of

the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de

licence. L'exploitation est autorisée aux deux conditions suivantes:

• l'appareil ne doit pas produire de brouillage, et

030-02351-0000 HOOD/LVR ASSY ST E EA 1.00

150-00024-0010 TUBING SHRINK 10G IN 2.00

150-00049-0010 SHRINK TUBING WHT IN 0.75

350-00052-0010 SHRINK TUBING WHT IN 4.5

300-02586-0020 ANTENNA CABLE INTERCONNECT KA 44B DO-160D RF .00

53001150-1 50 OHM QUADRAXIAL CABLE FT 48.17

025-00003-0008 WIRE 22 GRY IN 4.30

710-H4TS HEAT SHRINK, 1/4, PRNTABLELABL EA 1

---------------------------------------------------------------------------------------------------------------------------------------------------

SYM-

BOL PART NO. FIND NO. DESCRIPTION UM -0020

---------------------------------------------------------------------------------------------------------------------------------------------------

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• l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est

susceptible d'en compromettre le fonctionnement.

1.7 CONTINUED AIRWORTHINESS INSTRUCTIONS

1.7.1 Equipment

The instructions for continued airworthiness given in the TC or STC approvals for this product supplements or

supersedes the instructions for continued airworthiness in this manual.

The KTR 2280A is designed and manufactured to allow "on-condition maintenance". On condition maintenance

is described as follows; There are no periodic service requirements necessary to maintain continued

airworthiness. No maintenance is required until the equipment does not properly perform its intended function.

When service is required, a complete performance test must be accomplished following any repair action.

Consult the KTR 2280A CMM, Pub. No. D201610000050, for complete performance test information. All

maintenance must be performed by a Honeywell approved repair center

14 CFR Part 23.1529 and 25.1529, Instructions for Continued Airworthiness is met per the following instructions:

The removal of the equipment is on the condition of failure. There is no required periodic maintenance for the

KTR 2280A.

NOTE: Upon completion of maintenance or repair, the post-installation checkout procedures must be

performed. Refer to 2.4 POST-INSTALLATION CHECKS for the procedures.

1.7.2 Wires and Coaxial Cables

During on-condition or regularly scheduled maintenance, inspect the wires and coax cables following the

guidelines listed in AC 43.13-1B Chapter 11, 12 as necessary.

1.8 ANTENNA RF EXPOSURE

WARNING: TO MINIMIZE RF EXPOSURE TO PERSONNEL, INSTALL THE ANTENNA

GENERALLY AWAY FROM AREAS WHERE PEOPLE ARE LOCATED. IN

SITUATIONS WHERE A PERSON WOULD BE DIRECTLY EXPOSED TO ANTENNA

RADIATION, SUCH AS IN A COMPOSITE AIRCRAFT, A MINIMUM SEPARATION OF

1.97 FT (60 CM) IS GENERALLY REQUIRED BETWEEN ANY PART OF THE

ANTENNA AND ANY LOCATION WHERE A PERSON MAY BE PERMANENTLY

SEATED IN THE AIRCRAFT. LESSER SEPARATION IS ACCEPTABLE IN AN

AIRCRAFT WHERE METAL SKIN SHIELDS THE OCCUPANTS FROM THE

ANTENNA

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SECTION 2

INSTALLATION

2.1 GENERAL INFORMATION

This section contains general suggestions and information to consider before installation of the KTR 2280A.

Close adherence to these suggestions will assure optimum performance from the equipment.

NOTE: The conditions and test required for the TSO/ETSO approval of this article are minimum performance

standards. Those installing this article, on or within a specific type or class of aircraft, are responsible

for determining that the aircraft installation conditions are suitable for the TSO/ETSO article. TSO/

ETSO articles must have separate approval for installation in an aircraft. The article can be installed

only if performed under article 14 CFR part 43 or the applicable airworthiness requirements.

NOTE: Per AC 23.1309-1E, the probability of total loss of navigation and communication (a Hazardous

failure) must be less than 1E-7 (Part 23 Class III or Class IV) per flight hour and only dual installation

of KTR 2280A can support this probability requirement without the installation of additional navigation

or communication equipment. Additionally, other installation considerations must be analyzed (e.g.

electrical wiring and interconnect, power distribution, RF cabling and antennas) to determine the

acceptability.

2.2 UNPACKING and INSPECTING EQUIPMENT

Exercise extreme care when unpacking the equipment. Make a visual inspection of the unit for evidence of

damage during shipment. If a claim for damage is to be made, save the shipping container to substantiate the

claim. The claim must be promptly filed with the transportation company. It would be advisable to retain the

container and packing material after all equipment has been removed, in the event that equipment storage or

reshipment must become necessary.

2.3 EQUIPMENT INSTALLATION

2.3.1 Avionics Cooling Requirements

The unit is cooled by a fan internal to the unit and an external fan attached to the rear rack assembly plate, the

latter being a part of the installation (Refer to Figure 2-21 KTR 2280A Installation Drawing). During installation,

do not block any holes in the unit cover(s) which would restrict air flow.

2.3.2 Equipment Location

The following paragraphs contain information pertaining to the initial installation of the KTR 2280A MMDR,

including instructions concerning the location and mounting of the supporting antenna(s).

The equipment must be installed in the aircraft in a manner consistent with acceptable workmanship and

engineering practices and in accordance with the instructions set forth in this publication. To ensure that the

system has been properly and safely installed in the aircraft, the installer make a thorough visual inspection and

conduct an overall operational check of the system on the ground prior to flight.

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KTR 2280A

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15 May 2017

The installation must be in accordance with standards established by the customer's installing agency and

existing conditions as to unit location and type of installation; however, the following must be considered before

installing the system in order to assure a more satisfactory performance from the equipment.

NOTE: The TSO identifies the minimum performance standards, tests, and other conditions applicable for

issuance of design and production approval of the article. The TSO applicant is responsible for

documenting all limitations and conditions suitable for installation of the article. An applicant

requesting approval for installation of the article within a specific type or class of product is responsible

for determining environmental and functional compatibility.

Care must be exercised to avoid mounting components near equipment operating with high pulse current or

high rf power outputs such as radar and satellite communications equipment. In general, the equipment must

be installed in a location convenient for operation, inspection, and maintenance, and in an area consistent with

the TSO environmental limits. Determine the mounting location for system components following the guidelines

below

2.3.2.1 Mounting Tray Location(s)

The KTR 2280A MMDR mounting tray can be installed in any convenient location.

2.3.2.2 Antenna(s)

The antenna(s) must be well removed from other antenna projections, the engine(s), and propeller(s). It must

also be well removed from landing gear doors, access doors, or other openings which will break the ground

plane for the antenna(s). On metal skinned aircraft, the antenna(s) must be bonded to the surface of the aircraft

in a fore to aft location that provides the flattest ground plane. On composite aircraft, the antenna(s) must be

located at the center of a conductive ground plane, contoured to the shape of the aircraft, having dimensions of

at least 2 feet by 2 feet. The antenna penetration must be designed such that the structural integrity of the

fuselage is not compromised. The antenna(s) need to be within 5 degrees of the centerline.

Where practical, plan the antenna location(s) to keep cable lengths as short as possible and avoid sharp bends

in the cable to minimize the VSWR. Avoid running other cables or wires near the antenna cable(s).

On pressurized aircraft, the antenna(s) must be sealed using an approved sealant, such as RTV No. 3145 (PN

016-01082-0000) or equivalent, around the connector and mounting hardware.

The antenna edge and mounting hardware recesses must be sealed from the outside for moisture protection

using RTV or equivalent.

Mount the antenna(s) in as clean as environment as possible, away from exhaust gases and oils. The

antenna(s) must be kept clean. If left dirty (oil covered), the antenna performance can be affected.

2.3.3 KTR 2280A Mechanical Installation

The mounting tray for the MMDR must be mounted using the dimensions specified in the outline and mounting

drawing, Figure 2-21 (KTR 2280A Installation Drawing). Install the unit as follows:

(1) Slide the MMDR into the tray until the locking rod engages the nut on the back of the

rack.

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I M P O R T A N T : T h e l o c k i n g r o d i s l o c a t e d c l o s e t o o n e s i d e o f t h e K T R 2 2 8 0 A . A s t h e

locking rod is tightened, use the opposite hand to press the opposite side of the KTR

2280A into the installation rack. This will ensure that the KTR 2280A is

fully inserted within the mounting rack.

T h e K T R 2 2 8 0 A m u s t u s e t h e i n t e r n a l f a n s o r a p a r t o f t h e m o u n t i n g r a c k f o r a i r c o o l i ng.

The mounting racks and other objects will be installed as per the instructions in the in-

stallations in the installation drawing to allow air flow through the chassis.

CAUTION: DO NOT OVERTIGHTEN THE LOCKING ROD.

(2) Using a 3/32 inch allen wrench, turn the locking rod clockwise until it has drawn the unit

into the rack and mating connectors and is tight.

CAUTION: DO NOT USE BALL END ALLEN WRENCHES.

To remove the unit, turn the securing rod counter clockwise until it disengages from the mounting tray. Then,

pull the unit out of the mounting rack.

The KTR 2280A can be installed in any orientation. For additional KTR 2280A installation information, refer to

Figure 2-21 (KTR 2280A Installation Drawing).

2.3.4 Antenna Mechanical Installation

2.3.4.1 VHF COM Antennas

The VHF COM antenna must be mounted as far away as possible (8 feet, minimum) from other similar antennas

and the vertical stabilizer. Mounting the COM antenna as far away as possible from the navigation antenna will

help reduce COM to NAV interference. The COM antenna must also be mounted as far away as possible from

an ELT antenna to prevent distortion of the radiated pattern and to prevent radiated broadband noise from the

ELT when excited by the COM transmissions. Radiated broadband noise from an ELT is a common cause of

COM-to-COM and COM-to-NAV interference. Mounting one antenna on top of the fuselage at the highest

location to ensure a good radiation pattern and the other on the bottom of the fuselage offers good separation

with a minimum of interaction.

It is recommended that one COM transceiver be connected to the top antenna for good ground communication

and that the other COM transceiver be connected to the bottom antenna to provide good airborne

communications. If mounting antennas on the same side of the aircraft is unavoidable, maintain the minimum

allowable separation (8 feet).

The antenna must be mounted on a section of the aircraft that is horizontal during cruise flight. The base of the

antenna must be well bonded to the metal aircraft skin. Remove any paint from around the mounting holes to

ensure a good connection between the antenna and the skin. The metal aircraft skin at the base of the antenna

must extend a minimum of twenty-four inches in every direction. This provides the ground plane required for the

antenna. Any less metallized area will result in reduced communication range at some bearings around the

aircraft and can increase interference to and from other systems.

The COM transceiver performance depends heavily on the integrity of the electrical bonding to the airframe and

also the electrical integrity of the aircraft structure. If the electrical resistance between an antenna and the

aircraft or between adjacent skin panels change intermittently, noisy communications can result.

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Connect the antenna to the COM unit with 50 ohm coaxial cable, keeping the cable length to a minimum and

avoiding sharp bends in the cable. Keep the COM antenna cable as far away from other antenna cables as

possible and do not bundle several cables together. Prepare the cable to the BNC connector as shown in Figure

2-18 Right Angle Connector Instruction Sheet

Use Dow-Corning DC-4, or equivalent, on both inside and outside of the connector and its mate as an effective

barrier against moisture and to prevent corrosion.

2.3.4.2 NAV Antennas

LIMITATIONS: If radio is used for VDB installation, the total minimum installation loss must be 5 dB in NAV

antenna RF path. Installation loss includes the antenna gain and implementation loss from

antenna to MMDR.

The NAV antenna must be well removed from other antennas, projections, engines or propellers. It must have

a clear line of sight area if possible. The antenna must be mounted symmetrically with the center line of the

aircraft. Avoid running other coaxial cables and wires near the NAV antenna cable.

The VOR/LOC antenna with Glideslope is a two piece dipole with one part mounted on each side of the vertical

stabilizer. It must be installed on the upper section of the vertical stabilizer of single finned aircraft and be at least

28 inches (measured vertically) from the horizontal stabilizer.

On dual VOR/ILS installations, it is recommended that a splitter be used to divide signals from a single VOR/

LOC antenna into two or more receivers. Use double shielded cables to reduce interference to the receivers.

Prepare the cable to the BNC connector as shown in Figure 2-18 Right Angle Connector Instruction Sheet

2.3.4.3 ADF Antennas

The antenna installation will determine, to a large extent, whether the ADF will give optimum performance as

required. The KA 44B ADF Antenna contains both the loop and sense antennas. The following considerations

must be taken into account before selecting a location for the antenna:

CAUTION KEEP THE ANTENNA AT LEAST 4 FEET AWAY FROM DME OR TRANSPONDER ANTENNAS

TO MINIMIZE L-BAND INTERFERENCE. THE ANTENNA MUST BE MOUNTED WELL CLEAR

OF THE AIRCRAFT GENERATOR/ALTERNATOR AND WELL CLEAR OF ANY GENERATOR/

ALTERNATOR CABLES.

CAUTION: DO NOT ROUTE THE CABLES ALONG WITH HIGH POWER LEVEL TRANSMITTING

CABLES. DO NOT ROUTE THE CABLES WITH OR NEAR ALTERNATOR OR 400HZ CABLES.

MAKE SURE THAT THE CABLES DO NOT INTERFERE WITH ANY OF THE AIRCRAFT

CONTROL CABLES.

• Mount the antenna on the center line of the aircraft fuselage. Failure to do so can result in

excessive Q.E. error.

• If the antenna is to be top mounted, select a location where shadowing from the wings, etc., is

minimized.

• The antenna must be well removed from any projections such as engines and propellers, as well

as landing gear doors, access doors or other openings which will break the ground plane for the

antenna.

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• Use the template included in the installation kit to mark the mounting holes on the aircraft fuselage.

• Drill and/or punch the required holes.

• Use a piece of fine sandpaper or emery cloth to sand the area on the fuselage skin on which the

backup plate is to be mounted.

• Apply Alumiprep No. 33, PN 016-01127-0000, to both the inside area of the fuselage and the back

of the doubler plate, following the directions on the container to cleanse the metal of any residue.

• Apply Alodine No. 1001, PN 016-00128-0000, to both locations following the directions on the

container. This is used to ensure good bonding and prevent oxidation.

• Refer to the installation manual and mount the antenna as shown. First rivet the doubler plate in

place. It is imperative that the doubler plate make a good ground plane contact with the inside of

the aircraft skin.

• Prepare the ADF RF cable as shown in Figure 2-1 thru Figure 2-11 Quadraxial Cable Preparation.

Note that the cable provided can be cut to length as required for the installation.

2.3.5 KTR 2280A Wiring and Cable Installation

2.3.5.1 KTR 2280A Interconnection and Cable Harness Fabrication

The KTR 2280A MMDR receives primary power from the aircraft power source. A typical interface is shown in

Figure 2-24 KTR 2280A Interconnect Diagram. Aircraft specific interfaces with more details are provided in

separate EB or Installation Drawings.

The length of the wires to parallel pins must be approximately the same length, so that the best distribution of

current can be effected. Honeywell recommends that all wires, including spares, as provided with the

interconnect definition information be included in the fabrication of the wiring harness. However; if full wiring is

not desired, the installer must ensure that the minimum wiring requirements for the features and functions to be

used have been incorporated.

When cables are installed in the aircraft, they must be supported firmly enough to prevent movement and must

be carefully protected against chafing. Additional protection must also be provided in all locations where the

cable can be subjected to chafing.

In wire bundles, the cabling must not be tied tightly together as this tends to increase the possibility of noise

pickup and similar interference. When routing cables through the aircraft the cables must cross high level RF

lines at right angles.

Prior to installing any equipment, make a continuity check of all wires and cables associated with the system.

Then apply power and check for proper voltages at system connectors, and then remove power before

completing the installation.

The following guidelines are recommended:

(1) The installing facility will supply and fabricate all external cables. The required connec-

tors are supplied as part of the installation kit (Refer to 1.4.1 KTR 2280A Installation

Kit).

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( 2 ) T h e u n i t m u s t b e k ept a minimum of three feet from the antenna. Additionally, the an-

tenna coax cable must not be bundled with the other wiring harnesses to the unit.

( 3 ) T h e l e n g t h a n d r o uting of the external cables must be carefully planned before attempt-

ing the actual installation. Avoid sharp bends or locating the cable near aircraft control

cables. The cables must be of a length to allow for a “maintenance loop”. That is, the

length must be adequate to access and extend the connectors aft of the panel for future

maintenance purposes. Excess cabling must be secured and stowed by tie-wrapping

until such maintenance is required.

( 4 ) T h e c a b l e s m u s t be supported firmly enough to prevent movement. They must be care-

fully protected wherever one can chafe against another or against some other object.

Extra protection must be provided in all locations where the cables can be subject to

chafe. Shields on shielded wires must be grounded in accordance with the system in-

terconnection information.

( 5 ) S h i e l d s m u s t b e c a r r i e d t h r o u g h a n y o b s t r u c t i o n t h r o u g h a t h r u - b u l k h e a d c o n n e c t o r . I f

shielding cannot be carried through by use of a bulkhead/connector pin, precautions

must be taken to ensure each segment of the shielded lead be grounded at only one

point. A ground connection of not more than two inches in length must be used. The

preceding discussion does not apply to coaxial and quadraxial cable.

( 6 ) A v o i d routing cables near high noise and high power sources.

Quadraxial Cable Preparation

( 1 ) R e m o v e t h e o u t e r i n stallation 0.900 inch (22.88 mm) from the end of cable, to expose

the outer layer as shown in Figure 2-1.

Figure 2-1 (Sheet 1 of 1) Quadraxial Cable Preparation

(2) Push the braid back as far as possible as shown in Figure 2-2. This will be pulled back

up later and soldered to the connector body.

Figure 2-2 (Sheet 1 of 1) Quadraxial Cable Preparation

(3) Measure back 0.700 inch (17.78 mm) and remove the outer insulation from the middle

shield as shown in Figure 2-3.

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Figure 2-3 (Sheet 1 of 1) Quadraxial Cable Preparation

( 4 ) T i n t h e e x p o s e d shield of the middle coax. With a cutting tool, score the tinned shield

around the entire circumference as shown in Figure 2-4.

Figure 2-4 (Sheet 1 of 1) Quadraxial Cable Preparation

(5) Carefully break loose the tinned middle coax shield and slide it off. This will expose the

center coax insulation as shown in Figure 2-5.

Figure 2-5 (Sheet 1 of 1) Quadraxial Cable Preparation

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(6) Measure back 0.500 inch (12.70 mm) and remove the insulation from the center shield

as shown in Figure 2-6.

Figure 2-6 (Sheet 1 of 1) Quadraxial Cable Preparation

( 7 ) T i n t h e s h i e l d f o r t h e c e n t e r c o a x a s s h o w n i n F i g u r e 2 - 7 .

Figure 2-7 (Sheet 1 of 1) Quadraxial Cable Preparation

(8) Measure back from the end of the cable 0.30 inch (7.6 mm) and score the center shield

with a cutting tool around the full circumference as shown in Figure 2-8.

Figure 2-8 (Sheet 1 of 1) Quadraxial Cable Preparation

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(9) Carefully break the shield loose. Strip off the insulation from the center conductor as

shown in Figure 2-9.

Figure 2-9 (Sheet 1 of 1) Quadraxial Cable Preparation

(10) Install 0.25 inch (6.35 mm) length of shrink tubing over the middle shield stub to prevent

possible shorts to the outer shield as shown in Figure 10.

Figure 2-10 (Sheet 1 of 1) Quadraxial Cable Preparation

( 1 1 ) C o n n e c t o r A s s e m b l y

• I n s t a l l t h e f e r r u l e o v e r t h e c e n t e r s h i e l d a n d s o l d e r .

• S l i p t h e c a b l e i n t o t h e c o n n e c t o r h o u s i n g a s s h o w n i n F i g u r e 2 - 1 1 .

• S o l d e r t h e c e n t e r c o n d u c t o r t o t h e c e n t e r t e r m i n a l .

• P u l l u p t h e o u t e r s h i e l d a n d s o l d e r t o t h e b o t t o m s t e m .

• I n s t a l l s h r i n k tubing over the entire assembly to the bottom of the connector

housing as shown in Figure 2-11.

• Install the horse shoe shaped insert for a 50 ohm impedance match.

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• Install the rear cover cap and solder to barrel lip in two places.

Figure 2-11 (Sheet 1 of 1) Connector Assembly

2.3.5.2 Taylor Backshell Instructions

A . G e n e r a l I n f o r m a t i o n

( 1 ) T a y l o r B a c k s h e l l s a r e a p r o p r i e t a r y H o n e y w e l l d e s i g n d e v e l o p e d t o e x p e d i t e

cable harness fabrication while ensuring that HIRF and lightning performance

goals are met. A typical backshell is shown in Figure 2-12 Typical Taylor

Backshell. Figure 2-13 Backshell Assembly Exploded View provides an

exploded view of the backshell. Table 2-1 KTR 2280A Backshell Hardware

describes the connector type used for the KTR 2280A.

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Figure 2-12 (Sheet 1 of 1) Typical Taylor Backshell Instructions

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( 2 ) A p p l y L o c t i t e 4 2 5 o r e q u i v a l e n t t o a l l s c r e w t h r e a d s w h e n

assembling components.

Figure 2-13 (Sheet 1 of 1) Backshell Assembly Exploded View

( B ) B a c k s h e l l W i r i n g

( 1 ) S t r i p t h e o u t e r j a c k e t o f t h e t w i s t e d p a i r a s s h o w n i n F i g u r e 2 - 1 4 A s s e m b l y

Details. Trim the shield braid to 1.25 inch (31.75 mm) length and then comb out

Table 2-1 KTR 2280A Backshell Hardware

Connector

Type PN

Backshell Cover Cover

Screws Bar Clamp

Assy Strain

Relief

Clamp

44 pin

right-angle

custom

073-01141

-0002 073-01142

-0002 076-03189

-0001 200-10452

-0001 047-11179

-0004

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the braid. The braids from two twisted pairs can be twisted together to maintain

the proper diameter for the twisted braid.

Figure 2-14 (Sheet 1 of 1) Assembly Details

(2) If installing a single twisted pair, the combed braid must be folded back on itself

and twisted to form the proper diameter bundle. Refer to Figure 2-15 Assembly

Details.

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Figure 2-15 (Sheet 1 of 1) Assembly Details

( 3 ) C r i m p p i n s o r s o c k e t s o n t o t h e w i r e s .

( 4 ) I n s e r t t h e p i ns or sockets into the connector. When using oversized power and

ground contacts, ensure heat shrink tubing is used to cover exposed ends of

contacts.

( 5 ) P l a c e t h e b a c k s h e l l o v e r t h e w i r e b u n d l e .

( 6 ) A t t a c h t h e c o n n e c t o r t o t h e b a c k s h e l l .

( 7 ) I n s e r t t h e s h i e l d b r a i d i n t o t h e s l o t i n t h e b a c k s h e l l c o v e r

( 8 ) A t t a c h t h e b a c k s h e l l c o v e r t o t h e b a c k s h e l l w i t h t h e s c r e w s p r o v i d e d .

( 9 ) D r e s s t h e t w i s t e d s h i e l d s a s s h o w n i n F i g u r e 2 - 1 6 S h i e l d B r a i d R o u t i n g a n d

Clamping Bar Details. Do not allow twisted shields to cross over each other.

Tighten the clamping bar to secure the braids and provide a reliable electrical

ground.

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Figure 2-16 (Sheet 1 of 1) Shield Braid Routing and Clamping Bar Details

(11) When the clamping bar is tight, the exposed braids must be trimmed as shown

in Figure 2-16 Shield Braid Routing and Clamping Bar Details.

(12) Insert the strain relief and secure with a tie wrap as shown in Figure 2-17

Securing Strain Relief Clamp.

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Figure 2-17 (Sheet 1 of 1) Securing Strain Relief Clamp

( c ) I n s t a l l a t i o n C o n s i d e r a t i o n s

( 1 ) D e t e r m i n i n g W i r e L e n g t h : T h e l e n g t h o f w i r e f r o m t h e p o i n t a t w h i c h t h e s h i e l d

is split off to the terminations in the connector must be as short as possible to

allow the wire to lay in the backshell without straining the wires.

( 2 ) G r o u n d i n g : T a y l o r B a c k s h e l l s h a v e a n e x t e r n a l t a p p e d h o l e t h a t c a n b e u s e d t o

attach a ground strap. This can be used at the installer's discretion.

(3) Shell Aperture: When the strain relief is tightened against the wire bundle

ensure that there are no large openings in the shell back and that the wires are

held securely. A different size strain relief can be required if the wire bundle is

too small. Wrapping wires in the connector throat is acceptable to bring the

bundle diameter up to a size that can be properly clamped.

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Figure 2-18 (Sheet 1 of 1) Right Angle Connector Instruction Sheet

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2.3.5.3 Primary Power and Circuit Breaker Requirements

The KTR 2280A MMDR receives primary power from the aircraft power circuit breakers. Power connections,

wire sizes, and circuit breaker requirements can be found in the system installation manual and/or EB for a

specific installation.

2.3.5.4 Connectors

Figure 2-19 (Sheet 1 of 1) KTR 2280A Mating Connector

Front View

Table 2-2 J1 Pin Functions

No. Pin Name Description

1 O A429 Out1 A

2 O ADF Loop Enable OUT

3 I Test

4 I Unit Pos PGM 1*

5 I Unit Pos PGM 2*

6 I COM TX Interlock* IN

7 I COM MIC Key* IN

8 O RS-422 RX A

9 O RS-422 RX B

10 I RS-422 TX A

11 I RS-422 TX B

12 I COM MIC GND

13 I A429 IN3 A

14 O ADF Audio LO OUT

15 O ADF Audio HI OUT

16 O A429 Out1 B

17 O ADF MOD 0 OUT

18 O A429 Out2 A

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19 I Unit Pos Parity*

20 I A429 IN1 A

21 O A429 OUT3 A

22 I A429 IN2 A

23 I ADF ANT PWR Return

24 I DC Return 1

25 I DC Power 2 IN

26 I Emergency Channel*

27 I COM MIC Audio IN

28 I A429 IN3 B

29 O NAV Audio LO OUT

30 O NAV Audio HI OUT

31 O ADF MOD 90 OUT

32 O A429 Out2 B

33 O MMDS FAN 5V OUT

34 I A429 IN1 B

35 O A429 OUT3 B

36 I A429 IN2 B

37 I Pgm Pin Common

38 O ADF ANT PWR OUT

39 I DC Power 1 IN

40 I DC Return 2

41 I Download*

42 I/O VDL Interlock IN OUT*

43 O COM Audio/Sidetone LO OUT

44 O COM Audio/Sidetone HI OUT

No. Pin Name Description

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Table 2-3 Antenna Connector Functions

Figure 2-20 (Sheet 1 of 1) KA 44B Mating Connector Front View

(Part of Antenna Cable Assembly, PN 200-02586-0020)

Connector Pin I/O Description

J101 1 I/O COM RF

J102 1 I ADF RF IN

J103 1 I NAV RF IN

J104 1 I Glideslope RF IN

Note: * indicates the Pin is active GND.

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Table 2-4 KA 44B Pin Functions

2.3.5.5 Crimp Tool Information

Table 2-5 Crimp Tools and Accessories

PIN I/O SIGNAL NAME

1 I ANTENNA POWER

2 I LOOP ENABLE

3 O RF INPUT

4 I ADF MOD 90 Out

5 I ADF MOD 0 Out

6 NO CONNECTION

7 GROUND

8 INNER SHIELD

9 MIDDLE/OUTER SHIELD

Crimp Tool Honeywell PN 005-02012-0021, Positronic 9507 or

equivalent

Positioner Positronic 9502-3 or equivalent

Insertion/Extraction Tool Positronic 4811-2-0-0 or equivalent

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Figure 2-21 (Sheet 1 of 4) KTR 2280A Installation Drawing

(Dwg No 155-06081-0000 Rev N)

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Figure 2-21 (Sheet 2 of 4) KTR 2280A Installation Drawing

(Dwg No 155-06081-0000 Rev N)

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Figure 2-21 (Sheet 3 of 4) KTR 2280A Installation Drawing

(Dwg No 155-06081-0000 Rev N)

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Figure 2-21 (Sheet 4 of 4) KTR 2280A Installation Drawing

(Dwg No 155-06081-0000 Rev N)

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Figure 2-22 (Sheet 1 of 1) KA 44B Outline and Mounting Drawing

(Dwg No 155-05334-0000 Rev AC)

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Figure 2-23 (Sheet 1 of 1) KA 44B Outline and Mounting Drawing

(Dwg No 155-05334-0010 Rev AD)

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Figure 2-24 (Sheet 1 of 5) KTR 2280A Interconnect Diagram

(Dwg No 155-01835-0000 Rev -)

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Figure 2-24 (Sheet 2 of 5) KTR 2280A Interconnect Diagram

(Dwg No 155-01835-0000 Rev -)

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Figure 2-24 (Sheet 3 of 5) KTR 2280A Interconnect Diagram

(Dwg No 155-01835-0000 Rev -)

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Figure 2-24 (Sheet 4 of 5) KTR 2280A Interconnect Diagram

(Dwg No 155-01835-0000 Rev -)

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Figure 2-24 (Sheet 5 of 5) KTR 2280A Interconnect Diagram

(Dwg No 155-01835-0000 Rev -)

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2.4 POST-INSTALLATION CHECKS

2.4.1 KTR 2280A MMDR Post-Installation Inspection and Ground Test

2.4.1.1 INSPECTION

Table 2-6 Inspection/Check Procedure is a visual inspection/check procedure that must be performed after

system installation as part of a system checkout. A post-installation test per paragraph 2.4.1.2 Ground Tests

must be performed. In addition, the procedure must be used as a periodic maintenance inspection check.

Table 2-6 Inspection/Check Procedure

(1) Perform the following inspections on the overall system:

( a ) C h e c k t h a t c a b l e s d o n o t i n t e r f e r e w i t h a i r c r a f t c o n t r o l s o r o t h e r e q u i p m e n t .

(b) Check cabling for proper routing and check security of tie-down points. Inspect and adjust cable

runs to ensure that cables are not strained, kinked, or severely twisted and are not exposed to

rough or sharp surfaces.

(2) System Interwiring Check

To check the aircraft and MMDR system interconnections proceed as follows:

( a ) C h e c k t h a t a l l c a b l es and interwiring are installed in accordance with the interwiring and cable

harness fabrication instructions (refer to paragraph 2.3.5.1 KTR 2280A Interconnection and Ca-

ble Harness Fabrication).

( b ) U s i n g t h e a p p l i c a b le interconnection information, check wiring for proper destinations, opens

and shorts.

( c ) C h e c k R F c a b l e s f o r i n s e r t i o n l o s s a n d V S W R .

(3) Visual Inspection

In conjunction with system installation, perform the inspection/check procedure. Refer to Table 2-6 In-

spection/Check Procedure.

EQUIPMENT INSPECTION/CHECK PROCEDURE

KTR 2280A

MMDR A. Inspect external surface for damage.

B. Check that the unit is securely installed and that retaining

mechanism is securely tightened.

C. Ensure that all connections in the mounting tray are properly

mounted and secure.

Antennas A. Inspect external surfaces for damage.

B. Check that antenna is properly mounted and mounting

screws are tight.

C. Ensure that antenna coaxial cable connectors are properly

mated and secure.

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2.4.1.2 Ground Tests

( 1 ) P o s t - I n s t a l l a t i o n T e s t ( N A V / C O M F u n c t i o n a l i t y )

P e r f o r m a g r o u n d c h e c k o f t h e i n s t a l l a t i o n b e f o r e t h e f l i g h t t e s t . U s i n g a l o c a l f r e q uency, confirm

that the COM function can receive and transmit a modulated signal. Using a ramp tester, con-

firm that VOR, LOC, and GS needle deflections move in the correct direction, the To/From flag

is the proper sense, and that the warning flags are functioning properly. Check all aircraft con-

trol movements to be sure no electrical cables interfere with their operation.

CAUTION: AS AN ADDED PRECAUTION BEFORE ANY FLIGHT TESTS, CHECK THE ANTENNA.

VSWR MUST BE CHECKED WITH AN IN-LINE TYPE WATTMETER INSERTED IN THE

COAXIAL TRANSMISSION LINE BETWEEN THE TRANSCEIVER AND THE ANTENNA. ANY

PROBLEM WITH THE ANTENNA INSTALLATION WILL MOST LIKELY BE SEEN AS A HIGH

REFLECTED POWER.

NOTE: Installed system transmitter power may show considerably less that the manufacturer’s rating of

16 W (minimum). There are several reasons for this:

1 . I t i s n o t u n c o m m o n f o r a n i n s t a l l a t i o n t o h a v e u p t o a s m u c h a s 1 d B o f R F t r a n s m i s s i o n

line cable loss. This would reduce a 16 W transmitter output to 12.7 W.

2. RF power meter test equipment that has an accuracy of ± 0.3 dB would cause power

reading variations as high as ± 1 W.

3 . T h e e f f e c t of antenna VSWR in a given installation will affect the output power. The

VSWR is a function of the antenna design itself, aircraft skin properties and proximate

metallic features of the airframe, and the size of the metallic surface the antenna is

bonded to. Note that the committees that wrote the Minimum Operation Performance

Standards to which the VHF COM system is TSO’d are aware of this characteristic.

They have established that transmitter power for a 16 W (minimum) transmitter must

not drop below 8.0 W into a 2:1 VSWR and 6.4 W into a 3:1 VSWR (Refer to RTCA-

DO-186B and Eurocae ED-23C).

( 2 ) P o s t - I n s t a l l a t i o n T e s t ( A D F F u n c t i o n a l i t y )

A q u i c k p r e l i m i n a r y c h e c k c a n b e m a d e b y t u n i n g t o a l o c a l A M b r o a d c a s t s t a t i o n o r a strong

NDB station. Check for satisfactory audio (this must be done where clear reception is possible,

preferably outside of the hangar).

( a ) Q u a d r a n t a l E r r o r A d j u s t m e n t s

T h e s y s t e m h a s b e e n f a c t o r y a d j u s t e d t o c o m p e n s a t e f o r a t y p i c a l a i r f r a m e . T h e r e f o r e ,

little or no compensation must be required. Nonetheless, the KTR 2280A provides soft-

ware adjustment of Quadrantal Error (the average amount of quadrantal error (QE) that

exists due to the shape of the airframe). The values for these alignments are stored

within the aircraft system maintenance computer and downloaded to the KTR 2280A

on power up. If this download does not occur the KTR 2280A uses the last values that

were loaded.

T h e K A 4 4 B A D F a n t e n n a , l i k e m o s t m o d e r n A D F a n t e n n a s , c a n h a v e i n h e r e n t e r r o r s

at the quadrantal (45°, 135°, 225° and 315°) bearings relative to the antenna’s boresite.

The following procedure details the process for setting a KTR 2280A configuration pa-

rameter to allow the radio to automatically compensate for these inherent errors. It is

very important that this procedure be followed exactly as stated to ensure these qua-

drantal bearings are properly compensated.

T h i s p r o c e d u r e c a n b e c a r r i e d o u t a t a n y l o c a t i o n , h o w e v e r c a r e m u s t b e e x e r c i s e d t o

ensure that the chosen location is magnetically “clean”. Usually an airfield’s compass

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rose location is a good choice since magnetically “clean” is one of the criteria for estab-

lishing compass rose location.

NOTE: Ensure that QE = 0 is the value being fed or the last value that was fed to the KTR

2280A before performing this procedure.

1 . P o i n t t h e n o s e of the aircraft directly at the emitter (NDB or AM broadcast radio station)

being used for this purpose. Confirm this orientation by verifying the ADF indicator’s

bearing pointer is pointing directly to the lubber line (aircraft nose reference).

2 . R e c o r d t h e m a gnetic heading of the aircraft using the aircraft directional gyro or mag-

netic compass.

3 . U s i n g t h e a i r c r a f t ’ s d i r e c t i o n a l g y r o o r m a g n e t i c c o m p a s s a s a g u i d e , r o t a t e t h e a i r c r a f t

45° to the left such that the aircraft magnetic heading is now 45° less that the value

found in Step 2.

4 . R e c o r d t h e n u m b e r o f d e g r e e s b y w h i c h t h e A D F b e a r i n g h a s m o v e d r e l a t i v e t o t h e

ADF indicator’s lubber line. (This number must be a positive number and must be ap-

proximately 45°.) Log this number as Bearing_45.

5 . U s i n g t h e a i r c r a f t ’ s d i r e c t i o n a l g y r o o r m a g n e t i c c o m p a s s a s a g u i d e , r o t a t e t h e a i r c r a f t

another 45° to the left so that the aircraft magnetic heading is now 90° less than the

value found in Step 2.

6. Record the number of degrees by which the ADF bearing indication has moved relative

to the ADF indicator’s lubber line. (This number must be a positive number and must

be approximately 90°.)

7 . C o n f i r m t h a t t h e v a l u e i n S t e p 6 i s w i t h i n ± 5 ° of 90°. If not, the aircraft has a magnetic

anomaly that precludes the ability to calculate an acceptable QE adjustment The QE

alignment process must terminate at this point and not resume until any aircraft related

anomalies have been corrected. (Note: Problems with this step could also be due to the

airfield location where the QE alignment procedure is being performed if that location

is not magnetically “clean”.)

8 . U s i n g t h e a i r c r a f t ’ s d i r e c t i o n a l g y r o o r m a g n e t i c c o m p a s s a s a g u i d e , r o t a t e t h e a i r c r a f t

another 45° to the left so that the magnetic heading is now 135° less than the value

found in Step 2.

9. Record the number of degrees by which the ADF bearing indication has moved relative

to the ADF indicator’s lubber line. (This number must be a positive number and must

be approximately 135°.) Log this number as Bearing_135.

1 0 . U s i n g t h e a i r c r a f t ’ s directional gyro or magnetic compass as a guide, rotate the aircraft

another 45° to the left so that the aircraft magnetic heading is now 180° less than the

value found in Step 2.

11. Record the number of degrees by which the ADF bearing indication has moved relative

to the ADF indicator’s lubber line. (This number must be a positive number and must

be approximately 180°.)

1 2 . C o n f i r m t h e v a l u e r e c o r d e d i n S t e p 1 1 i s w i t h i n ± 5 ° of 180°. If not, the aircraft has a

magnetic anomaly the precludes the ability to calculate an acceptable QE adjustment.

The QE alignment process must terminate at this point and not resume until the aircraft

related anomalies have been corrected. (Note: Problems with this step could also be

due to the airfield location where the QE alignment procedure is being performed if that

location is not magnetically “clean”.)

1 3 . U s i n g t h e a i r c r a f t ’ s directional gyro or magnetic compass as a guide, rotate the aircraft

another 45° to the left so the aircraft magnetic heading is now 225° less than the value

found in Step 2.

14. Record the number of degrees by which the ADF bearing indication has moved relative

to the ADF indicator’s lubber line.

( T h i s n u m b e r m u s t b e a p o s i t i v e n u m b e r a n d m u s t b e a p p r o x i m a t e l y 2 2 5 °.) Log this

number as Bearing_225.

1 5 . U s i n g t h e a i r c r a f t ’ s directional gyro or magnetic compass as a guide, rotate the aircraft

another 45° to the left so that the aircraft magnetic heading is now 270° less than the

value found in Step 2.

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16. Record the number of degrees by which the ADF bearing indicator has moved relative

the ADF indicator’s lubber line (This number must be a positive number and must be

approximately 270°.)

1 7 . C o n f i r m t h e v a l u e r e c o r d e d i n S t e p 1 6 i s w i t h i n ± 5 ° of 270°. If not, the aircraft has a

magnetic anomaly that precludes the ability to calculate an acceptable QE adjustment.

The QE alignment process must terminate at this point and not resume until the aircraft

related magnetic anomalies have been corrected. (Note: Problems with this step could

also be due to the airfield location where the QE alignment procedure is being per-

formed if that location is not magnetically “clean”.)

1 8 . U s i n g t h e a i r c r a f t ’ s directional gyro or magnetic compass as a guide, rotate the aircraft

another 45° to the left so that the aircraft magnetic heading is now 315° less than the

value found in Step 2.

19. Record the number of degrees by which the ADF bearing indicator has moved relative

to the ADF indicator’s lubber line. (This number must be a positive number and must

be approximately 315°.) Log this number as Bearing_315.

2 0 . U s i n g t h e f o l l o w i n g f o r m u l a s , c a l c u l a t e t h e Q E o f f s e t :

QE_45 = 45 - Bearing_45 (This could be a negative number if Bearing_45 is > 45)

QE_135 = Bearing_135 - 135 (This could be a negative number if Bearing_135 is <

135)

QE_225 = 225 - Bearing_225 (This could be a negative number if Bearing_225 is >

225)

QE_315 = Bearing_315 - 315 (This could be a negative number if Bearing_315 is <

315)

Q E = ( ( Q E _ 4 5 ) + ( Q E _ 1 3 5 ) + ( Q E _ 2 2 5 ) + ( Q E _ 3 1 5 ) ) / ( 4 )

21. Enter the value calculated in Step 20 into the KTR 2280A Parameter table per 2.5 KTR

2280A INSTALLATION PARAMETER MODIFICATIONS.

22. Recheck the relative bearings abd readjust the QE compensation as necessary to split

the error at the quadrantal points (45°, 135°, 225° and 315°) to obtain the lowest pos-

sible error.

( b ) O p e r a t i o n a l C h e c k s

The following operational checks are to verify proper operation of the

ADF function of the KTR 2280A and can be made with the aircraft in the parking area.

1 . P l a c e t h e A D F in the ANT mode and tune in several known stations. Verify that audio

reception is satisfactory and that volume control operation is normal. Verify that the

ADF indicator needle is parked at the 90 degree position relative to the noise of the air-

craft. Place the unit in the ADF mode and verify that the needle points to the station.

2 . S e l e c t t h e B F O f u n c t i o n t o e n t e r t h e B F O m o d e a n d v e r i f y t h a t t h e B F O t o n e i s p r e s e n t

in the receiver audio (if a keyed CW station is used the tone heard will be the coded

identifier).

2.4.2 KTR 2280A Post-Installation Flight Tests

2.4.2.1 COM TRANSCEIVER FLIGHT TEST

To check the COM transceiver, maintain altitude of at least 1500 feet and contact a ground station

facility at a range of at least fifty nautical miles. Contact a ground station close in. Disable the automatic

squelch and listen for any unusual electrical noise which would reduce the COM receiver sensitivity by

increasing the squelch threshold. If possible, verify the communications capability on both the high and

low end of the VHF COM band. Ensure that the COM mode selector is capable of individually selecting

all three modes (one mode at a time).

2.4.2.2 NAV RECEIVER FLIGHT TEST

To check the VOR/ILS system, select a VOR frequency within a forty nautical mile range. Listen to the

VOR audio and ensure that no electrical interference such as magneto noise is present. Check the tone

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identifier filter operation. Fly inbound and outbound on a selected VOR radial and check for proper

LEFT-RIGHT and TO-FROM indications. Check the VOR accuracy.

NOTE: VOR ground station scalloping may be present.

To check the localizer and glideslope functions, select an appropriate ILS frequency and fly an approach

to the proper runway. Check for proper LEFT-RIGHT and UP-DOWN indications.

2.4.2.3 ADF RECEIVER FLIGHT TEST

Confirm that bearing indications to several local NDB facilities appear reasonable. Listen to the ADF

audio and ensure that no unusual electrical interference is present.

2.5 KTR 2280A INSTALLATION PARAMETER MODIFICATIONS

The KTR 2280A has several parameters that can be adjusted during installation in order to conform the unit to

a given installation. Parameter modifications must only be performed

by a qualified avionics technician. Table 2-7 Unit Parameters, lists the KTR 2280A adjustments accessible by

the technician to facilitate the unit installation.

NOTE: KTR 2280A units sent to the factory for repair will be returned to service with their factory defaults

reset as shown in Table 2-7 Unit Parameters.

The method for setting these parameters is a function of the specific installed system and the user interface used

for personality module settings. Refer to the appropriate STC Installation Manual for specific instructions. The

KTR 2280A responds to installed system personality module settings through high speed ARINC 429 labels

300, 301, 302, and 303. These labels occur periodically at a 1 Hz rate.

Table 2-7 Unit Parameters

T

NOTE: 1: This setting represents attenuation (in dB) relative to rated audio output level.

NOTE: 2: This setting is a relative number only. Each numeric value represents a change of 1.5 dB.

Nominal setting, which represents the level provided by typical microphones, is the default

Parameter MMDR Factory

Default Minimum

Setting Maximum

Setting Resolution

COM Carrier Squelch (-dBm) 88 85 100 1

COM Emergency Freq. (MHz) 121.500 118.000 136.990 *

COM Emergency Volume (dB) 120 072 1

COM Sidetone Level (dB)152 072 1

COM Squelch (SNR dB) 12 320 1

COM Microphone Gain221 031 **

QE Offset (degrees) 0-20 +20 0.1

* 8.33 kHz channel spacing

** Each resolution increment is equivalent to 1.5 dB. Total range is -31.5 dB to 15.0 dB

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numeric value of 21. This control provides amplification (for unusually weak microphones) of up

to 15 dB (setting of 31) or attentuation (for extra sensitive microphones) of up to 31.5 dB (setting

of 0) relative to the default.

2.6 ARINC 429 INTERFACE

The KTR 2280A has three high speed ARINC 429 transmitters and three high speed ARINC 429 receivers. All

labels are transmitted on both transmit channels. The same data is transmitted over both channels

Table 2-8 ARINC 429 Output Labels

Function Label Parameter Interval (ms)

NAV 034 VOR/ILS Frequency 200

053 VOR/ILS Standby (Preset) Frequency 200

173 Localizer Deviation 100

174 Glideslope Deviation 100

222 VOR Bearing 100

242 VOR/ILS Station Ident (Characters 1-2) 200

244 VOR/ILS Station Ident (Characters 3-4) 200

265 VOR/ILS Volume 200

COM 030 VHF COM Frequency 200

047 VHF Aux/Guard COM Frequency 200

052 VHF COM Standby (Preset) Frequency 200

263 VHF Aux/Guard COM Frequency 200

266 VHF COM Volume 200

267 VHF COM Status 200

ADF 032 ADF Frequency 200

162 ADF Bearing 100

262 ADF Volume 200

CMC 350 Member System Status 1000

352 MMDF System Fault Report 1000

377 Member System Identification 1000

VDL 172 System Address Label (SAL) 1000

270 VDR Status Word 1000

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Table 2-9 ARINC 429 Input Labels

VDL 304 Williamsburg BOP Burst

377 VDR Equipment ID 1000

VDB 033 Landing Mode/Frequency 200

045 Message Block Start Burst

046 Message Block Data Burst

* MMDR hardware fault (BIT 19 in Label 352) is set when the unit detects a hardware fault and/or

malfunction of the hardware that can result in incorrect data.

Function Label Parameter Interval (ms)

NAV 034 Set VOR/ILS Frequency 200

053 Set VOR/ILS Standby (Preset) Frequency 200

265 Set VOR/ILS Volume 200

COM 030 Set VHF COM Frequency 200

047 Set VHF Aux/Guard COM Frequency 200

052 Set VHF/COM Standby (Preset) Frequency 200

263 Set VHF Aux/Guard COM Volume 200

266 Set VHF COM Volume 200

ADF 032 Set ADF Frequency 200

262 Set ADF Volume 200

CLOCK 150 GMT (UTC) 1000

260 Date 1000

FLIGHT 151 Flight Leg 1000

APM 300 MMDR Configuration Options #1 1000

301 MMDR Configuration Options #2 1000

302 MMDR Configuration Options #3 1000

303 MMDR Configuration Options #4 1000

304 MMDR Configuration Options #5 1000

305 MMDR Configuration Options #6 1000

Function Label Parameter Interval (ms)

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CMC 227 CMC Command and Control 1000

VDB 033 Landing Mode/Frequency 200

VDL 172 System Address label 1000

214 Aircraft ICAO Address #1 1000

216 Aircraft ICAO Address #2 1000

251 Williamsburg BOP VDR #1 Burst

252 Williamsburg BOP VDR #2 Burst

253 Williamsburg BOP VDR #3 Burst

270 Apex CMU Status Word 1 1000

276 Apex CMU Status Word 2 1000

276 VDR Mode Command 500

Function Label Parameter Interval (ms)

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SECTION 3

OPERATION

3.1 GENERAL

The KTR 2280A is a remote mounted radio. As such, the user interface is defined by controllers and displays

unique to the particular system configuration. Refer to the appropriate pilot’s guide or flight manual supplement

for complete operating instructions.

The paragraphs below provide an overview of the controls and displays that are typically available in systems

that provide full KTR 2280A functionality.

3.1.1 VHF COM Controls and Displays

A. Frequency Selectors: An active frequency (channel) and a standby frequency (channel)

selector. A “swap” or “flip-flop” button may be available for swapping the active and standby

frequencies. The KTR 2280A responds to high speed ARINC 429 labels 030 and 052 for the

active and standby selections respectively. These labels appear only when a frequency

(channel) change is made.

B. Volume Control: A rotational knob or up/down pushbutton to adjust the volume of the COM

audio output. The KTR 2280A responds to high speed ARINC 429 label 266 for the COM

volume control setting. This label appears only when a volume change is made.

C. RX/TX Annunciators: Some display means indicate when the radio is transmitting (TX

Annunciator) and when the radio is receiving (RX Annunciator). This is keyed by the squelch

status. The KTR 2280A outputs the RX status and TX status on the high speed ARINC 429

label 267, having a 5 Hz update rate.

D. Squelch Disable Control: Normally a pushbutton that cycles between Squelch Disable and

Squelch Enable. The RX annunciator will be displayed during Squelch Disable. The KTR 2280A

responds to high speed ARINC 429 label 266 for COM squelch disable (override). This label

appears only when a status change is made.

E. Stuck Microphone Annunciator: Some display means to indicate when the Push-to-Talk (PTT)

button has been held down beyond the 30 second transmitter time-out period. The KTR 2280A

outputs the stuck microphone alert on high speed ARINC 429 label 267, having a 5 Hz update

rate.

F. Emergency COM Control: Some means to channel the KTR 2280A transmitter and receiver to

a pre-defined emergency frequency (channel) in the event of display and/or control failure. Pin

26 on main connector J1 (Refer to Figure 2-24 KTR 2280A Interconnect Diagram) is the

discrete control for this function. Grounding this normally open pin places the unit into

Emergency COM Mode.

G. AUX COM channel and volume controls are typically not available. These parameters can be

adjusted through APM settings.

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3.1.2 VHF NAV Controls and Displays

A. Frequency Selectors: An active frequency (channel) and a standby frequency (channel)

selector. A “swap” or “flip-flop” button may be available for swapping the active and standby

frequencies. The KTR 2280A responds to high speed ARINC 429 labels 034 and 053 for the

active and standby selections respectively. These labels appear only when a frequency

(channel) change is made.

B. Volume Control: A rotational knob or up/down pushbutton to adjust the volume of the NAV

audio output. The KTR 2280A responds to high speed ARINC 429 label 265 for the volume

control setting. This label appears only when a volume change is made.

C. Ident Tone Control: A means to defeat the Ident Tone notch filter in the NAV audio so the 1020

Hz Ident Tone can be heard. The KTR 2280A responds to high speed ARINC 429 label 265 for

ident filter control. This label only occurs when a status change is made.

D. The NAV Station Ident is Output on Label 242 and 244.

E. KTR 2280A responds to high speed ARINC 429 label 033 for VDB mode selection. This label

only occurs when a mode change is made.

3.1.3 ADF Controls and Displays

A. Frequency Selectors: An active frequency (channel) and a standby frequency (channel)

selector. A “swap” or “flip-flop” button may be available for swapping the active and standby

frequencies. The KTR 2280A responds to high speed ARINC 429 label 032 for frequency

selection. This label only occurs when a frequency (channel) change is made.

B. Volume Control: A rotational knob or up/down pushbutton to adjust the volume of the ADF audio

output. The KTR 2280A responds to high speed ARINC 429 label 262 for volume setting. This

label only occurs when a change is made.

C. Mode Control: A means to select the following ADF operating modes:

ADF Mode - The normal ADF operating mode.

ANT Mode - The mode in which ADF bearing information is defeated and receiver sensitivity

and bandwidth are optimized for audio reception only.

BFO Mode - The mode required in order to use first generation NDB facilities that used on/off

carrier keying for identification.

The KTR 2280A responds to high speed ARINC 429 label 032 for mode selection. This label

only occurs when a change is made.

3.1.4 VDL Mode A and VDL Mode 2

A. VDL Mode A

Mode A allows the KTR 2280A to exchange downlink and uplink POA data messages with a

CMF through a transmit/receive pair of 100 Kbps ARINC 429 digital interfaces.

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The downlink message data bits transferred to the KTR 2280A modulate the RF carrier at a rate

of 2,400 bps using the DSB-AM MSK modulation scheme.

The KTR 2280A also controls when to access the channel to transmit data. The data link

channel selection is still controlled by the CMF, but channel selection messages are exchanged

through the same high-speed ARINC 429 interface used to exchange AOA messages which

simplifies wiring.

BVDL Mode 2

VDL Mode 2 is the term used to describe a suite of air/ground protocols that increases the data

rate of the air/ground link to 31,500 bps.

VDL Mode 2 allows the transition from character-oriented ACARS protocols for end-to-end

delivery of messages to one that uses bit-oriented ATN protocols using the same VHF ground

and aircraft radios. The KTR 2280A Mode 2 capability supports the transmission and reception

of standard ACARS messages using a protocol referred to as AOA.

The KTR 2280A Mode 2 capability also supports the transmission and reception of bit-oriented

ATN application messages such as CPDLC. The set of VDL Mode 2 protocols consist of the

physical layer protocol, channel access protocol, data link service and management protocol,

and Mode 2 network access protocol. The physical layer protocol includes the modulation, data

rate, and forward error correction techniques used to transmit data over the air/ground link.

The channel access protocol is the method that allows multiple aircraft to communicate with the

ground stations on the same frequency. The data link service and management protocol

includes procedures to establish, maintain and hand-off an air/ground link, and ensure

error-free delivery of messages. The network access protocol is the interface between users

and the Mode 2 air/ground link service providers. As in Mode A, only the physical layer and

channel access protocols are performed by the KTR 2280A while the data link service and

management, and the network access protocols are performed by the CMF.

The VDL Mode 2 physical layer protocol employs a bit transmission rate of 31,500 bps over the

air/ground link on a single 25-kHz channel. The increased utilization of the 25-kHz channel is

achieved by use of a bandwidth modulation scheme known as D8PSK. A D8PSK transmitter

transmits a carrier whose phase is modulated by the data. The phase can be 0, 45, 90, 135,

180, 225, 270, or 315 degrees. The rate at which the carrier phase is changed is the modulation

rate.

The phase difference or D8PSK symbol between successive phase changes can be equal to

0, 45, 90, 135, 180, 225, 270, or 315 degrees. Since there are eight possible phase differences,

each phase change (D8PSK symbol) represents three bits of information: 000, 001, 011, 010,

110, 111, 101, or 100.

For example, if the phase changes at a 10.5-kHz rate, the bit transmission rate is equal to 31.5

Kbps. The VDL Mode 2 D8PSK modulator uses the bits in the message, three at a time, to

select the carrier phase change at a rate of 10,500 D8PSK symbols each second. A 10.5-kHz

D8PSK phase modulation rate corresponds to a D8PSK bit transmission rate of 31.5 Kbps.

The VDL Mode 2 channel access protocol is CSMA modified to let all terminals to have equal

chances to access the channel when multiple terminals have data to transmit. The ability to

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optimize the CSMA protocol is included in the VDL Mode 2 channel access protocol

specification.

As in Mode A, the Mode 2 data link channel selection is controlled by the CMF through the same

high-speed ARINC 429 interface used to exchange downlink and uplink AOA or ATN

messages. The CMF also dynamically controls the switching between Mode A and Mode 2

operation subject to available coverage. Since the VDL Mode 2 data rate and modulation

scheme differ from those used in Mode A, separate VHF frequencies and ground-based VHF

equipment must be used to give POA and AOA/ATN service coverage. As a result, the

availability of high-speed AOA service depends on the availability of ground stations.

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APPENDIX A

KTR 2280A MMDR TRANSCEIVER

ENVIRONMENTAL QUALIFICATION FORMS

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KA 44B ENVIRONMENTAL PERFORMANCE

The KA 44B ADF Antenna (Honeywell PN 071-1234-00) is certified to TSO C41c with RTCA DO-160A

environmentals per B2D2/A/LJY/XXXXXX/ABABA.

Recent "not-for-certification-credit" testing has been performed on this antenna to determine expected

performance in selected DO-160D environmental conditions.

DO-160D Section 20 (RF Susceptibility) Tests

A KA 44B production test sample was subjected to Category TT fields as defined in the test environment called

out in RTCA DO-160D Section 20 (Change No. 1). This unit was tested in conjunction with the KTR

2280 Multi-Mode Digital Radio. All conducted and radiated susceptibility performance requirements

were passed except for radiated susceptibility in the band of interference frequencies between 277 MHz

and 339 MHz. Within this band the KA 44B could not tolerate interference levels greater than 0.8 V/m

(for acceptable audio signal-to-noise) or greater than 1.1 V/m (for acceptable bearing error).

A KA 44B production test sample was subjected to the 100 V/M (and greater) HIRF levels expected for aircraft

system level certification. This test was done in a manner consistent with aircraft system level HIRF

certification testing. No permanent damage was noted during the HIRF exposure and the unit returned

immediately to normal operation after the HIRF event terminated.

DO-160D Section 22 (Lightning Induced Transient Susceptibility) Tests

A KA 44B production test sample was subjected to Category A3J33 as defined and in the test environment

called out in RTCA DO-160D Section 22 (Change No. 3). The KA 44B passed all requirements.

DO-160D Section 23 (Lightning Direct Effects) Tests

A KA 44B production test sample was subjected to Category 2A as defined in the test environment called out in

RTCA DO-160D Section 23. The KA 44B passed all requirements.

Other DO-160D based test data has been collected and is available on request from Honeywell.

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APPENDIX B

DEVIATIONS

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Honeywell KTR2280A Licensed Non-Broadcast Aeronautical Transmitter User Manual System Installation Manual

Honeywell International Inc. Licensed Non-Broadcast Aeronautical Transmitter System Installation Manual

User Manual

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