Garmin MX20 User manual

MX20
Multi-Function Display
Installation Manual
May 2005
560-1025-09 Rev C

©2005 Garmin Ltd. or its subsidiaries. All rights reserved. Printed in the U.S.A.
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HISTORY OF REVISIONS
Part No. Revision Date Description
-- 11/1/99 Initial Release.
560-1025-01 -- 11/11/99 Updated installation package contents and equipment mounting
information.
560-1025-02 -- 1/17/00 Added the MX20 configuration procedure, expanded post installation
checkout procedures, added Appendix A.
560-1025-02 a 4/3/00 Clarified unit installation position. Corrected wiring diagram.
Incorporated changes for software version 1.2.
560-1025-02 b 7/25/00 Incorporated changes for software version 2.0.
560-1025-02 c 10/3/00 Added mounting tube considerations
560-1025-03 -- 12/1/00 Changes for class and category in environmental qualifications and
new ADS-B messages.
560-1025-04 -- 7/18/01 Changes to mounting tube and environmental qualifications for
helicopters.
560-1025-05 -- 4/12/02 Added I/O board option and SW to support traffic and radar.
560-1025-05 a 6/12/02 Added JTSO
560-1025-06 -- 11/13/02 Added landmark support for the TAWS8000
560-1025-07 -- 6/18/03 Changes for SW Ver 5.0. Radar and WSI.
560-1025-07 a 9/9/03 Changed UPS Aviation Technologies and logo to Garmin AT.
560-1025-07 b 1/5/04 SW Version 5.2. ART2000/2100 clarifications. Added support for
LED backlighting.
560-1025-08 - 5/1/04 SW Version 5.3. GDL90 interface and WSI Canadian weather added.
560-1025-09 - 10/27/04 SW Version 5.5. Added XM Satellite Weather and Audio
information as well as support for Honeywell KMH 820 IHAS.
560-1025-09 A 2/10/05 Added information about limiting number of FIS sources. Added
supported radar functions and sensors. Added manufacturer’s radar
part numbers.
560-1025-09 B 4/22/05 SW Version 5.6. MX20 may be one of multiple radar display
devices. GDL 90 control features may be enabled or disabled.
Update EULA.
560-1025-09 C 5/25/05 Corrected pinout information for Figure 2-18.
ORDERING INFORMATION
To receive additional copies of this publication, order part # 560-1025-09 Rev C, MX20 Multi-
Function Display Installation Manual.
OTHER PUBLICATIONS
MX20 Pilot’s Guide, P/N 560-1026-( )
MX20 Quick Reference Guide, P/N 561-0263-( )
GX50/60 Installation Manual, P/N 560-0959-( )
WX-500 Installation Manual, Goodrich Avionics P/N 009-11500-001
SKY899 Installation Manual, Goodrich Avionics P/N 009-11900-001
ART2000 Installation Manual, Allied Signal P/N 006-00643-0004
9900B Installation Manual, Ryan TCAD P/N 32-2301
9900BX Installation Manual, Ryan TCAD P/N 32-2351
WSI InFlight AV-200 Installation Manual, WSI P/N 305427-00
GTX330, GTX330D Transponder Manual, Garmin P/N 190-00207-02 Rev. A
GDL90 Installation Manual, Garmin AT P/N 560-1049-( ) Rev –
GDL 69/69A Installation Manual, Garmin P/N 190-00355-02

EULA Terms
You have acquired a device (MX20) which includes software licensed by Garmin International, Inc. or
its subsidiaries (Garmin) from one or more software licensors Garmin’s Software Suppliers. Such
software products, as well as associated media, printed materials, and "online" or electronic
documentation ("SOFTWARE") are protected by international intellectual property laws and treaties.
The SOFTWARE is licensed, not sold. All rights reserved.
• This EULA is valid and grants the end-user rights ONLY if the SOFTWARE is genuine and a genuine
Certificate of Authenticity for the SOFTWARE is included. For more information on identifying
whether your software is genuine, please see http://www.microsoft.com/piracy/howtotell.
• IF YOU DO NOT AGREE TO THIS END USER LICENSE AGREEMENT ("EULA"), DO NOT USE
THE MX20 OR COPY THE SOFTWARE. INSTEAD, PROMPTLY CONTACT GARMIN FOR
INSTRUCTIONS ON RETURN OF THE UNUSED MX20) FOR A REFUND. ANY USE OF THE
SOFTWARE, INCLUDING BUT NOT LIMITED TO USE ON THE MX20, WILL CONSTITUTE
YOUR AGREEMENT TO THIS EULA (OR RATIFICATION OF ANY PREVIOUS CONSENT).
• GRANT OF SOFTWARE LICENSE. This EULA grants you the following license:
>You may use the SOFTWARE only on the MX20.
> Restricted Functionality. You are licensed to use the SOFTWARE to provide only the limited
functionality (specific tasks or processes) for which the MX20 has been designed and marketed by
Garmin. This license specifically prohibits any other use of the software programs or functions, or
inclusion of additional software programs or functions that do not directly support the limited
functionality on the MX20. Notwithstanding the foregoing, you may install or enable on a MX20,
systems utilities, resource management or similar software solely for the purpose of administration,
performance enhancement and/or preventive maintenance of the MX20.
> If you use the MX20 to access or utilize the services or functionality of Microsoft Windows Server
products (such as Microsoft Windows Server 2003), or use the MX20 to permit workstation or
computing devices to access or utilize the services or functionality of Microsoft Windows Server
products, you may be required to obtain a Client Access License for the MX20 and/or each such
workstation or computing device. Please refer to the end user license agreement for your Microsoft
Windows Server product for additional information.
> NOT FAULT TOLERANT. THE SOFTWARE IS NOT FAULT TOLERANT. GARMIN HAS
INDEPENDENTLY DETERMINED HOW TO USE THE SOFTWARE IN THE MX20, AND MS
HAS RELIED UPON GARMIN TO CONDUCT SUFFICIENT TESTING TO DETERMINE THAT
THE SOFTWARE IS SUITABLE FOR SUCH USE.
> NO WARRANTIES FOR THE SOFTWARE. THE SOFTWARE is provided "AS IS" and with all
faults. THE ENTIRE RISK AS TO SATISFACTORY QUALITY, PERFORMANCE, ACCURACY,
AND EFFORT (INCLUDING LACK OF NEGLIGENCE) IS WITH YOU. ALSO, THERE IS NO
WARRANTY AGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR
AGAINST INFRINGEMENT. IF YOU HAVE RECEIVED ANY WARRANTIES REGARDING
THE MX20 OR THE SOFTWARE, THOSE WARRANTIES DO NOT ORIGINATE FROM,
AND ARE NOT BINDING ON, MS.
>No Liability for Certain Damages. EXCEPT AS PROHIBITED BY LAW, MS SHALL HAVE NO
LIABILITY FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES
ARISING FROM OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE
SOFTWARE. THIS LIMITATION SHALL APPLY EVEN IF ANY REMEDY FAILS OF ITS
ESSENTIAL PURPOSE. IN NO EVENT SHALL MS BE LIABLE FOR ANY AMOUNT IN
EXCESS OF U.S. TWO HUNDRED FIFTY DOLLARS (U.S.$250.00).
> Restricted Uses. The SOFTWARE is not designed or intended for use or resale in hazardous
environments requiring fail-safe performance, such as in the operation of nuclear facilities, aircraft
navigation or communication systems, air traffic control, or other devices or systems in which a

malfunction of the SOFTWARE would result in foreseeable risk of injury or death to the operator of
the device or system, or to others.
> Limitations on Reverse Engineering, Decompilation, and Disassembly. You may not reverse
engineer, decompile, or disassemble the SOFTWARE, except and only to the extent that such activity
is expressly permitted by applicable, law notwithstanding this limitation.
> SOFTWARE as a Component of the MX20 - Transfer. This license may not be shared, transferred
to or used concurrently on different computers. The SOFTWARE is licensed with the MX20 as a
single integrated product and may only be used with the MX20. If the SOFTWARE is not accompanied
by a MX20, you may not use the SOFTWARE. You may permanently transfer all of your rights under
this EULA only as part of a permanent sale or transfer of me MX20, provided you retain no copies of
the SOFTWARE. If the SOFTWARE is an upgrade, any transfer must also include all prior versions of
the SOFTWARE. This transfer must also include the Certificate of Authenticity label. The transfer
may not be an indirect transfer, such as a consignment. Prior to the transfer, the end user receiving the
SOFTWARE must agree to all the EULA terms.
>Consent to Use of Data. You agree that MS, Microsoft Corporation and their affiliates may collect
and use technical information gathered in any manner as part of product support services related to the
SOFTWARE. MS, Microsoft Corporation and their affiliates may use this information solely to
improve their products or to provide customized services or technologies to you. MS, Microsoft
Corporation and their affiliates may disclose this information to others, but not in a form that
personally identifies you.
>Internet Gaming/Update Features. If the SOFTWARE provides, and you choose to utilize, the
Internet gaming or update features within the SOFTWARE, it is necessary to use certain computer
system, hardware, and software information to implement the features. By using these features, you
explicitly authorize MS, Microsoft Corporation and/or their designated agent to use this information
solely to improve their products or to provide customized services or technologies to you. MS or
Microsoft Corporation may disclose this information to others, but not in a form that personally
identifies you.
>Internet-Based Services Components. The SOFTWARE may contain components that enable and
facilitate the use of certain Internet -based services. You acknowledge and agree that MS, Microsoft
Corporation or their affiliates may automatically check the version of the SOFTWARE and/or its
components that you are utilizing and may provide upgrades or supplements to the SOFTWARE that
may be automatically downloaded to your MX20. Microsoft Corporation or their affiliates do not use
these features to collect any information that will be used to identify you or contact you. For more
information about these features, please see the privacy statement at
http://go.imcrosoft.com/fwlmk/?LinkId=25243.
> Links to Third Party Sites. You may link to third party sites through the use of the SOFTWARE. The
third party sites are not under the control of MS or Microsoft Corporation, and MS or Microsoft are not
responsible for the contents of any third party sites, any links contained in third party sites, or any
changes or updates to third party sites, MS or Microsoft Corporation is not responsible for webcasting
or any other form of transmission received from any third party sites. MS or Microsoft Corporation are
providing these links to third party sites to you only as a convenience, and the inclusion of any link
does not imply an endorsement by MS or Microsoft Corporation of the third party site.
> Notice Regarding Security. To help protect against breaches of security and malicious software,
periodically back up your data and system information, use security features such as firewalls, and
install and use security updates.
> No Rental/Commercial Hosting. You may not rent, lease, lend or provide commercial hosting
services with the SOFTWARE to others.
> Separation of Components. The SOFTWARE is licensed as a single product. Its component parts
may not be separated for use on more than one computer.

> Additional Software/Services. This EULA applies to updates, supplements, add-on components,
product support services, or Internet-based services components ("Supplemental Components"), of the
SOFTWARE that you may obtain from Garmin,MS, Microsoft Corporation or their subsidiaries after
the date you obtain your initial copy of the SOFTWARE, unless you accept updated terms or another
agreement governs. If other terms are not provided along with such Supplemental Components and the
Supplemental Components are provided to you by MS, Microsoft Corporation or their subsidiaries
then you will be licensed by such entity under the same terms and conditions of this EULA, except that
(i) MS, Microsoft Corporation or their subsidiaries providing the Supplemental Components will be
the licensor with respect to such Supplemental Components in lieu of Garmin for the purposes of the
EULA, and (ii) TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW. THE
SUPPLEMENTAL COMPONENTS AND ANY (IF ANY) SUPPORT SERVICES RELATED TO
THE SUPPLEMENTAL COMPONENTS ARE PROVIDED AS IS AND WITH ALL FAULTS. ALL
OTHER DISCLAIMERS, LIMITATION OF DAMAGES, AND SPECIAL PROVISIONS
PROVIDED BELOW AND/OR OTHERWISE WITH THE SOFTWARE SHALL APPLY TO SUCH
SUPPLEMENTAL COMPONENTS. MS, Microsoft Corporation or their subsidiaries reserve the right
to discontinue any Internet-based services provided to you or made available to you through the use of
the SOFTWARE.
> Recovery Media. If SOFTWARE is provided by Garmin on separate media and labeled "Recovery
Media" you may use the Recovery Media solely to restore or reinstall the SOFTWARE originally
installed on the MX20.
> Backup Copy. You may make one (1) backup copy of the SOFTWARE. You may use this backup
copy solely for your archival purposes and to reinstall the SOFTWARE on the MX20. Except as
expressly provided in this EULA or by local law, you may not otherwise make copies of the
SOFTWARE, including the printed materials accompanying the SOFTWARE. You may not loan, rent,
lend or otherwise transfer the backup copy to another user.
> End User Proof of License. If you acquired the SOFTWARE on a MX20, or on a compact disc or
other media, a genuine Microsoft "Proof of License'”/Certificate of Authenticity label with a genuine
copy of the SOFTWARE identifies a licensed copy of the SOFTWARE. To be valid, the label must be
affixed to the MX20, or appear on Garmin’s software packaging. If you receive the label separately
other than from Garmin,it is invalid. You should keep the label on the MX20 or packaging to prove
that you are licensed to use the SOFTWARE.
> Product Support. Product support for the SOFTWARE is not provided by MS, Microsoft
Corporation, or their affiliates or subsidiaries. For product support, please refer to Garmin’s support
number provided in the documentation for the MX20. Should you have any questions concerning this
EULA or if you desire to contact Garmin for any other reason, please refer to the address provided in
the documentation for the MX20.
> Termination. Without prejudice to any other rights, Garmin may terminate this EULA if you fail to
comply with the terms and conditions of this EULA. In such event, you must destroy all copies of the
SOFTWARE and all of its component parts.
> EXPORT RESTRICTIONS. You acknowledge that SOFTWARE is subject to U.S. and European
Union export jurisdiction. You agree to comply with all applicable international and national laws that
apply to the SOFTWARE, including, the U.S. Export Administration Regulations, as well as end-user,
end-use and destination restrictions issued by U.S. and other governments. For additional information
see http://www.microsoft.com/exporting/ .

MX20 Installation Manual i
TABLE OF CONTENTS
1INTRODUCTION.............................................................................................................................. 1
1.1 ABOUT THIS MANUAL ..................................................................................................................... 1
1.2 SYSTEM DESCRIPTION ..................................................................................................................... 1
1.3 REGULATORY COMPLIANCE ............................................................................................................ 4
1.4 UNPACKING THE EQUIPMENT .......................................................................................................... 4
1.5 PACKAGE CONTENTS ....................................................................................................................... 4
1.6 SPECIAL TOOLS REQUIRED .............................................................................................................. 6
1.7 LICENSE REQUIREMENTS................................................................................................................. 6
1.8 OPERATING INSTRUCTIONS.............................................................................................................. 6
2INSTALLATION............................................................................................................................... 7
2.1 PRE-INSTALLATION INFORMATION .................................................................................................. 7
2.2 INSTALLATION OVERVIEW............................................................................................................... 7
2.3 INSTALLATION CONSIDERATIONS .................................................................................................... 7
2.3.1 EXTERNAL SENSORS....................................................................................................................................7
2.3.2 MOUNTING CONSIDERATIONS ......................................................................................................................7
2.3.3 MINIMUM SYSTEM CONFIGURATION..........................................................................................................12
2.3.4 AIR CIRCULATION ......................................................................................................................................12
2.3.5 COMPASS SAFE DISTANCE .........................................................................................................................12
2.3.6 VIEWING ANGLE ........................................................................................................................................12
2.4 EQUIPMENT MOUNTING................................................................................................................. 13
2.5 ELECTRICAL CONNECTIONS........................................................................................................... 15
2.5.1 MX20 BASIC DATA PORT CONFIGURATION...............................................................................................16
2.5.2 MX20 I/O DATA PORT CONFIGURATION ...................................................................................................17
2.5.3 DATA CARD ...............................................................................................................................................18
2.5.4 PLACARD ...................................................................................................................................................18
2.5.5 POWER.......................................................................................................................................................18
2.5.6 ELECTRICAL LOAD ANALYSIS....................................................................................................................18
2.5.7 SAMPLE WIRING DIAGRAMS ......................................................................................................................19
2.6 WEIGHT AND BALANCE ................................................................................................................. 26
2.7 CONFIGURING THE MX20 &MX20 I/O......................................................................................... 26
2.7.1 ENABLE/DISABLE FUNCTIONS....................................................................................................................27
2.7.2 EXTERNAL DATA SOURCE .........................................................................................................................29
2.7.3 EXTERNAL DATA SOURCE FOR THE MX20 I/O ..........................................................................................30
2.7.4 MISCELLANEOUS SETUP OPTIONS..............................................................................................................31
2.8 CONFIGURING THE KMH 820 IHAS FOR THE MX20..................................................................... 33
2.9 MX20 POST INSTALLATION CHECKOUT ........................................................................................ 34
2.9.1 MOUNTING /WIRING CHECK .....................................................................................................................34
2.9.2 SOFTWARE AND DATABASE TEST ..............................................................................................................34
2.9.3 EXTERNAL DATA SOURCE TESTS...............................................................................................................34
2.9.4 ALTITUDE TEST .........................................................................................................................................37
2.9.5 COMPASS TEST ..........................................................................................................................................37
2.9.6 STORMSCOPE INTERFACE TEST..................................................................................................................37
2.9.7 SKYWATCH INTERFACE TEST....................................................................................................................37
2.9.8 RYAN TCAD INTERFACE TEST..................................................................................................................38
2.9.9 RADAR CONFIGURATION &CHECKOUT PROCEDURES .............................................................................38
2.9.10 LANDMARK TAWS8000 AND KGP560 CHECKOUT PROCEDURE..........................................................41
2.9.11 GARMIN GTX330 CHECKOUT PROCEDURE ..........................................................................................43
2.9.12 GARMIN AT GDL 69/69A CHECKOUT PROCEDURE..............................................................................43
2.9.13 WSI INFLIGHT CHECKOUT PROCEDURE................................................................................................43

Table of Contents
ii MX20 Installation Manual
2.9.14 HONEYWELL KMH 820 IHAS CHECKOUT PROCEDURE ....................................................................... 43
3SPECIFICATIONS..........................................................................................................................45
3.1 MX20 FEATURES ...........................................................................................................................45
3.1.1 DISPLAY .................................................................................................................................................... 45
3.1.2 USER INTERFACE ...................................................................................................................................... 45
3.1.3 EXPANSION/INTERNAL ARCHITECTURE..................................................................................................... 45
3.1.4 POSITION SOURCE ..................................................................................................................................... 45
3.1.5 ELECTRICAL.............................................................................................................................................. 45
3.1.6 AVIONICS OUTPUTS................................................................................................................................... 46
3.1.7 AVIONICS INPUTS ...................................................................................................................................... 46
3.1.8 AVIONICS OUTPUTS (I/O MODEL) ............................................................................................................. 46
3.1.9 AVIONICS INPUTS (I/O MODEL)................................................................................................................. 46
3.1.10 SERIAL INTERFACE DATA SOURCES ..................................................................................................... 46
3.1.11 PHYSICAL SPECIFICATIONS ................................................................................................................... 47
3.1.12 ENVIRONMENTAL SPECIFICATIONS ....................................................................................................... 47
3.1.13 TSO AUTHORIZATIONS......................................................................................................................... 48
3.1.14 INTERNAL GPS RECEIVER PERFORMANCE ........................................................................................... 48
3.1.15 WEATHER RADAR AND FUNCTIONS...................................................................................................... 49
3.2 REAR CONNECTOR PIN OUTS .........................................................................................................50
3.3 ANTENNA REQUIREMENTS .............................................................................................................52
3.3.1 A-33 ANTENNA ......................................................................................................................................... 52
3.3.2 A-34 (590-1112)....................................................................................................................................... 53
4LIMITATIONS ................................................................................................................................55
4.1 OPERATION..................................................................................................................................... 55
4.2 INSTALLATION ................................................................................................................................55
4.3 GPS ANTENNA ...............................................................................................................................55
4.4 ANTENNA INSTALLATION –GENERAL............................................................................................55
4.5 TRAFFIC SENSOR ............................................................................................................................55
4.6 FIS SENSOR ....................................................................................................................................55
5TROUBLESHOOTING...................................................................................................................57
5.1 TROUBLESHOOTING GUIDE ............................................................................................................57
5.2 INTEGRATION TROUBLESHOOTING PROCEDURE ............................................................................62
5.3 CONTACTING THE FACTORY FOR ASSISTANCE ..............................................................................62
6CONTINUED AIRWORTHINESS INSTRUCTIONS.................................................................63
6.1 EQUIPMENT CALIBRATION .............................................................................................................63
6.2 CLEANING THE FRONT PANEL ........................................................................................................ 63
6.3 DISPLAY BACKLIGHT .....................................................................................................................63
6.4 LITHIUM BATTERY REPLACEMENT ................................................................................................63
6.5 ALTITUDE ENCODER ...................................................................................................................... 63
6.6 MANUALS .......................................................................................................................................63
7ENVIRONMENTAL QUALIFICATIONS ...................................................................................65
APPENDIX A - I/O SPECIFICATIONS..............................................................................................A-1
A.1 MOVING MAP INPUT.............................................................................................................A-1
A.2 BINARY NEAREST LIST DATA............................................................................................A-2
A.3 FLIGHT PLAN WAYPOINT TYPES.................................................................................... A-4

Table of Contents
MX20 Installation Manual iii
A.4 ALTITUDE ENCODER/CONVERTER INPUT ...................................................................A-6
A.5 STORMSCOPE INPUTS..........................................................................................................A-7
APPENDIX B - EQUIPMENT COMPATIBILITY ........................................................................... B-1
B.1 POSITION SOURCE................................................................................................................ B-1
B.2 NAV SOURCE........................................................................................................................... B-1
B.3 ALTITUDE SOURCE............................................................................................................... B-1
B.4 TRAFFIC SOURCE..................................................................................................................B-2
B.5 WEATHER SOURCE............................................................................................................... B-2
B.6 TERRAIN TAWS SOURCE .................................................................................................... B-2
B.7 AUDIO........................................................................................................................................ B-2
LIST OF TABLES
TABLE 1-1. INSTALLATION PACKAGE CONTENTS ........................................................................................ 5
TABLE 2-1. PREFERRED BASIC DATA PORT CONFIGURATIONS ................................................................. 16
TABLE 2-2. MX20 I/O DATA PORT CONFIGURATIONS .............................................................................. 17
TABLE 2-3. UNIT POWER LOADS................................................................................................................ 18
TABLE 2-4. UNIT WEIGHTS ........................................................................................................................ 26
TABLE 3-1. UNIT POWER LOADS................................................................................................................ 45
TABLE 3-2. UNIT WEIGHTS ........................................................................................................................ 47
TABLE 3-3. TSO AUTHORIZATIONS ........................................................................................................... 48
TABLE 3-4. RADAR SENSORS AND SUPPORTED RADAR FUNCTIONS ......................................................... 49
TABLE 3-5. MX20 REAR PANEL CONNECTOR PIN OUT (J1)...................................................................... 50
TABLE 3-6. MX20 I/O CONNECTOR PIN OUT (J2) ..................................................................................... 51
TABLE 5-1. TROUBLESHOOTING GUIDE ..................................................................................................... 57
TABLE 7-1. ENVIRONMENTAL QUALIFICATION FORM ............................................................................... 65
TABLE A-1. MOVING MAP ASCII NAVIGATION DATA ............................................................................ A-1
TABLE A-2. NEAREST WAYPOINT LIST DATA ......................................................................................... A-2
TABLE A-3. MOVING MAP BINARY ROUTE DATA ................................................................................... A-3
TABLE A-4. FLIGHT PLAN WAYPOINT TYPE............................................................................................ A-4
TABLE A-5. ALTITUDE INPUT DATA ........................................................................................................ A-6
LIST OF ILLUSTRATIONS
FIGURE 1-1. EXAMPLE OF A MX20 SYSTEM BLOCK DIAGRAM ................................................................... 2
FIGURE 1-2. EXAMPLE OF A MX20 I/O SYSTEM BLOCK DIAGRAM ............................................................. 3
FIGURE 1-3. MX20 FRONT PANEL DESCRIPTION......................................................................................... 3
FIGURE 2-1. COCKPIT PANEL CONFIGURATION FOR A LARGE PANEL ......................................................... 8
FIGURE 2-2. COCKPIT PANEL CONFIGURATION FOR A SMALL PANEL ......................................................... 9
FIGURE 2-3. SAMPLE GX60 &MX20 MOUNTING ..................................................................................... 10
FIGURE 2-4. ALTERNATE MX20 MOUNTING CONFIGURATION ................................................................. 10
FIGURE 2-5. MX20 UNIT DIMENSIONS ...................................................................................................... 11
FIGURE 2-6. MX20 MOUNTING TUBE ASSEMBLY DIMENSIONS................................................................ 12

Table of Contents
iv MX20 Installation Manual
FIGURE 2-7. MX20 TYPICAL REAR PANEL WIRING CONNECTIONS........................................................... 14
FIGURE 2-8. DATA PORT LOCATION ........................................................................................................... 15
FIGURE 2-9. PREFERRED DATA PORT DESCRIPTION...................................................................................16
FIGURE 2-10. DATA I/O PORT DESCRIPTION ..............................................................................................17
FIGURE 2-11. SAMPLE SYSTEM WIRING DIAGRAM WITH UAT (INTERNAL GPS VERSION) ......................19
FIGURE 2-12. SAMPLE SYSTEM WIRING DIAGRAM WITH WX500 OR GDL 90 UAT (NO INTERNAL GPS
VERSION)............................................................................................................................................20
FIGURE 2-13. SAMPLE SYSTEM WIRING DIAGRAM FOR TCAD AND STORMSCOPE...................................21
FIGURE 2-14. SAMPLE SYSTEM WIRING DIAGRAM I/O MODEL WITH RADAR,GOODRICH SKYWATCH,
GDL 69/69A AND WSI INFLIGHT RECEIVER .....................................................................................22
FIGURE 2-15. SAMPLE SYSTEM WIRING DIAGRAM OF MX20 I/O WITH LANDMARK TAWS ....................23
FIGURE 2-16. SAMPLE SYSTEM WIRING DIAGRAM OF MX20 I/O WITH GARMIN GTX330....................... 24
FIGURE 2-17. SAMPLE SYSTEM WIRING DIAGRAM OF MX20 I/O WITH KGP-560 ....................................25
FIGURE 2-18. SAMPLE WIRING DIAGRAM -MX20 I/O WITH KMH 820 IHAS ..........................................25
FIGURE A-1. MOVING MAP DATA OUTPUT (EXTENDED DATA DISABLED).............................................A-4
FIGURE A-2. MOVING MAP DATA OUTPUT (EXTENDED DATA ENABLED)..............................................A-5
FIGURE A-3. ALTITUDE DATA INPUT........................................................................................................A-7

Introduction
MX20 Installation Manual 1
1Introduction
1.1 About This Manual
This manual describes the installation of the MX20 Multi-Function Display. It is intended for use by
persons certified by the Federal Aviation Administration (FAA) to install aircraft devices. It includes
installation and checkout procedures for the MX20 to standards described in 14CFR Part 43. This
installation manual applies to MX20 part numbers: 430-0270-0( ), 430-0270-5( ), 430-0270-6( ), and
430-0270-7( ).
Provides an Introduction to the MX20. TSO certification information is also included in
this section.
Includes Installation and Checkout procedures.
Includes complete Specifications.
Includes Limitations information.
Includes Troubleshooting information.
Includes Continued Airworthiness Instructions requirements.
Includes the Environmental Qualification Form.
Includes I/O Specifications.
Includes Equipment Compatibility.
1.2 System Description
The MX20 is a multi-function display capable of displaying moving maps, terrain awareness,
obstructions, and VFR/IFR charting functions. An optional UAT data link provides ADS-B traffic,
FIS-B and TIS-B information. Interfacing to the WX-500 provides lightning strike information on the
display. Interfacing to the Garmin AT GDL 69 or WSI Inflight sensor may provide NEXRAD images,
graphic and text METARs, graphic and text TAFs, EchoTops, Sigmet, Airmet, and Temporary Flight
Restriction (TFR), and other information, depending on the selected subscription. Interfacing to the
Garmin AT GDL 69A provides XM Satellite Radio audio entertainment (with subscription) in
addition to the information available with the GDL 69.
The MX20 I/O option includes additional interface capabilities that allow connection to the ARINC
453 bus for the display of radar, ARINC 429 support for Goodrich SkyWatch interfaces, RS-232
support for Ryan TCAD, Landmark TAWS8000, and the Honeywell KGP560 and KMH 820 IHAS.
The MX20 with software versions V5.5 and below is intended to be the sole display device for radar
sensors. Using additional display devices may not display the intended information. The MX20 with
software version V5.6 may be one of multiple display devices for radar sensors.
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Appendix A
Appendix B

Introduction
2 MX20 Installation Manual
The MX20 must be connected to an external GPS navigation source, such as the Garmin AT GX or
CNX-series (or GNS 480), to provide route and flight plan information. The MX20 must be connected
to an external serial altitude source to provide terrain awareness information.
Interfacing to a Garmin GTX330 Mode S Transponder provides TIS-A traffic information.
Figure 1-1. Example of a MX20 System Block Diagram
The MX20 display is also available with an internal GPS. The internal GPS position source permits a
Navigation Uncertainty Category (NUC) value to be calculated and transmitted for ADS-B broadcast
via the legacy UAT. The MX20 internal GPS data is ignored by the GDL 90 UAT since the GDL 90
UAT has an internal GPS receiver to generate the same data. Legacy UATs are those installed in
original Capstone-equipped aircraft. The GDL 90 UAT is the next generation UAT data link radio.
MX20 software version V5.6 provides an installation configuration parameter to enable or disable the
GDL 90 UAT control functions. The MX20 I/O model is not available with the optional GPS engine.

Introduction
MX20 Installation Manual 3
Figure 1-2. Example of a MX20 I/O System Block Diagram
Graphic Display Power/Dimming
Line Select Keys
Menu/Enter Key
Data Card Ejector
Data CardDisplay TitleMounting ScrewSmart Key LabelsSmart Keys
Function Key
Photosensor
Figure 1-3. MX20 Front Panel Description
NOTE
Earlier versions of the MX20 have a rotary knob to control power and dimming functions.

Introduction
4 MX20 Installation Manual
1.3 Regulatory Compliance
The MX20 is designed and tested to meet the following TSO/JTSOs when connected to the
appropriate equipment:
•FAA TSO-C63c/JTSO 2C63c Airborne Weather Radar
•FAA TSO-C110a/JTSO-C110a Passive Thunderstorm Detection (Goodrich WX500)
•FAA TSO-C113/JTSO-C113 Multi-purpose Electronic Display
•FAA TSO-C118/JTSO-C118 Traffic Alert and Collision Avoidance (TCAS I)
•FAA TSO-C147 Traffic Advisory System (TAS)
•FAA TSO-C151a Terrain Awareness and Warning System (TAWS)
The MX20 software is designed and tested to RTCA/DO-178B, levels C and D, and ED-12B, levels C
and D.
NOTE
Unauthorized changes or modifications to the MX20 will void the compliance to
required regulatory agencies and authorization for continued equipment usage.
"The conditions and tests required for TSO/JTSO approval of this article are minimum performance
standards. It is the responsibility of those installing this article either on or within a specific type or class
of aircraft to determine that the aircraft installation conditions are within the TSO/JTSO standards. If not
within the TSO standards, the article may be installed only if the applicant documents further evaluation
for an acceptable installation and it is approved by the Administrator. The JTSO article may be installed
only if the installation is performed in accordance with Part 43 or the applicable airworthiness
requirements.”
1.4 Unpacking the Equipment
Carefully unpack the equipment. Visually inspect the package contents for any evidence of shipping
damage. Retain all shipping containers and packaging material in case reshipment is necessary.
1.5 Package Contents
As shipped from the Garmin AT factory, the MX20 Installation package includes most necessary
items for installation other than supplies normally available at the installation shop. The items
included in the package are listed in Table 1-1.

Introduction
MX20 Installation Manual 5
Table 1-1. Installation Package Contents
Part # Description
Quantity
w/o GPS
424-0751
Quantity
w/ GPS
Quantity
w/ I/O
424-0753
Unit
430-0270-0( ) MX20 Multifunction Display with GPS 1
430-0270-5( ) MX20 Multifunction Display without GPS 1
430-0270-6( ) MX20 I/O Traffic Multifunction Display 1
430-0270-7( ) MX20 I/O Traffic/Radar Multifunction Display 1
MX20 Installation Kit
115-0007-00 GPS 1575 MHz 2:1 Splitter 1
162-1008 Right Angle Coax Plug 1
162-1060 TNC Connector 3
162-1577* 37-Pin D-Sub 1 1 1
202-0001 Cable Tie 4 4 4
204-0037 Edge Grommet 6" 6" 6"
204-2100 Shoulder Bushing 2
220-0637 6-32 Wing Nut 1 1 1
240-0615 #6 Washer 2 2 2
224-0404 4-40 X 1/4 SS Flat Head Phillips Machine Screw 2 2 2
245-0027* Crimp Contact For D-Sub, 20 To 24 AWG Wire 30 30 40
310-0429-( ) MFD Mounting Tube 1 1 1
998-0048 3/32" Hex Driver 1 1 1
MX20 I/O Installation Kit
160-0138 62-Pin D-Sub, High Density 1
245-0059 Crimp Contact For High Density D-Sub, 22 To 30 AWG Wire 20
564-0076-0( ) Manual Kit 1 1 1
560-1025-( ) MX20 Installation Manual 1 1 1
560-1026-( ) MX20 Pilot’s Guide 1 1 1
561-0263 MX20 Quick Reference Guide 1 1 1
564-0078-0( ) STC Kit (AFM & MDL) 1 1 1
Notes:
* Pin has a barrel over the contact. Use ITT Cannon tools.
Other Required Materials
The MX20 equipment is intended for use with standard aviation accessories. See Section 2.3.1 for a
list of compatible equipment. The following items are required for the installation:
•Compatible position locating source, such as: GX50/55/60/65 GPS receiver, or CNX-series
(or GNS 480) receiver
•Compatible Serial Altitude Encoder

Introduction
6 MX20 Installation Manual
1.6 Special Tools Required
Crimp Tool
A crimp tool meeting MIL specification M22520/1-01 and a positioner/locator are required to ensure
consistent, reliable crimp contact connections for the rear d-sub connectors. Examples of these tools
are shown below:
For pin P/N 245-0027
ITT Cannon Phone [phone]
1851 E. Deere Ave. Fax [phone]
Santa Ana, CA 92705-6500
Insertion tool: ITT part # 274-7006-000 (Desc. CIET-20HD)
Regular-duty Crimp tool: ITT part # 995-0001-585 (Desc. M22520/1-01)
Regular-duty Locator tool: ITT part # 995-0001-244 (Desc. TH25)
Heavy-duty Crimp tool: ITT part # 995-0001-584 (Desc. M22520/2-01)
Heavy-duty Locator tool: ITT part # 995-0001-604 (Desc. M22520/2-08)
For pin P/N 245-0059 (High Density Connector – I/O Only)
Astro Tool Corp Phone [phone]
21615 SW TV Highway Fax [phone]
Beaverton, OR 97006
Crimp tool: Astro Tool part # 615708
Positioner: Astro Tool part # 616356
1.7 License Requirements
There are no license requirements for the MX20.
1.8 Operating Instructions
The MX20 Pilot’s Guide, Garmin AT P/N 560-1026-( ), covers operation and pilot interface. The
MX20 Quick Reference Guide is P/N 561-0263-( ).

Installation
MX20 Installation Manual 7
2Installation
This section describes the installation of the MX20 including mounting, wiring, connections, and
software configuration. A post-installation checkout procedure is included at the end of this section.
2.1 Pre-Installation Information
Always follow good avionics installation practices per FAA Advisory Circulars (AC) 43.13-1B, 43.13-
2A, and AC 20-138, or later FAA approved revisions of these documents.
Follow the installation procedure in this section as it is presented for a successful installation. Read the
entire section before beginning the procedure. Prior to installation, consider the structural integrity of the
MX20 installation as defined in AC 43.13.2A, Chapter 1. Perform the post installation checkout before
closing the work area in case problems occur.
Complete an electrical load analysis in accordance with AC 43.13-1B, Chapter 11, on the aircraft prior to
starting modification to ensure aircraft has the ability to carry the MX20 load. Refer to Section 2.5.6 for
the power consumption of each MX20 mode of operation (heater on). Document the results of the
electrical load analysis on FAA Form 337.
2.2 Installation Overview
A successful installation should start with careful planning including determination of mounting location
for the MX20, cable routing, and other required modifications. Once the mounting location has been
determined, prepare the mounting frames for installation. It may be easier to complete the wiring harness
and attach the connectors to the mounting frame before installing the mounting frame.
Carefully plan which external devices are to be connected to which MX20 ports observing the special
characteristics of ports 3 and 4.
2.3 Installation Considerations
2.3.1 External Sensors
External serial data sources intended for use with the MX20 should be checked for compatibility before
installation. Devices from other manufacturers or unlisted models are supported if they adhere to the
interface specifications provided in this manual. The list of supported devices is located in Section 3.1.10
of this manual.
When the MX20 is installed with external sensors, these sensors must be installed with manufacturer's
data. This manual does not provide information for the installation of specific external sensors.
2.3.2 Mounting Considerations
The MX20 is designed to mount in the avionics stack in the aircraft instrument panel within view and
reach of the pilot. The MX20 must be located where the operator will have easy access to the controls and
adequate viewing of the display. The preferred location would minimize pilot head movement when
transitioning between looking outside of the flight deck and viewing and operating the MX20. Sample
diagrams of typical cockpit front panel views of the MX20 are shown in Figure 2-1 and Figure 2-2.
The standard package includes a mounting frame for ease of mounting, connections, and service of the
unit. Allow an additional one-inch clearance to the rear of the mounting frame for connectors and cables.
Mounting frame details are shown in Figure 2-3, Figure 2-4, Figure 2-5, and Figure 2-6. Use of mounting
tube P/N 310-0429-01, or later FAA approved revision, is recommended for all installations and is
required for helicopter installations.

Installation
8 MX20 Installation Manual
The MX20 does not require external cooling. When mounting the MX20, leave a clearance of 1/8 to 1/4
inch between avionics to allow for air circulation.
For installations where a stack is not already installed in the aircraft or the alternate mounting
configuration depicted in Figure 2-4 is implemented, a separate structural approval is needed for
installation of the stack. Any other alternate mounting configuration is beyond the scope of this STC.
GX50/60 MX20 Preferred
Location
MX20 Alternate
Location
Figure 2-1. Cockpit Panel Configuration for a Large Panel

Installation
MX20 Installation Manual 9
Figure 2-2. Cockpit Panel Configuration for a Small Panel

Installation
10 MX20 Installation Manual
Figure 2-3. Sample GX60 & MX20 Mounting
Figure 2-4. Alternate MX20 Mounting Configuration
NOTE
This configuration utilizes an angle bracket along each side of the mounting tube. The installer must
consider the structural integrity of the installation as defined in AC43.13.2a Chapter 1.