Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated,
downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin.
Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a
hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision
hereto, provided that such electronic or printed copy of this manual or revision must contain the complete text of this
copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision
hereto is strictly prohibited.
is a registered trademark of Garmin International or its subsidiaries.
All other product or company names that may be mentioned in this publication are trade names, trademarks, or
registered trademarks of their respective owners.
®
word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such
At Garmin, we value your opinion. For comments about this guide, please e-mail Techpubs.Salem@garmin.com
For comments about Garmin aviation products, email Avionics@garmin.com
For information about the Aviation Limited Warranty
For aviation product support, refer to flyGarmin.com
refer to Garmin’s website.
.
.
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190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page i
Record of Revisions
RECORD OF REVISIONS
RevisionRevision DateSubject
906/29/17Added NV unit part numbers, updated unit weights, and other minor edits.
806/12/17Added v2.11 functionality.
710/13/16Added v2.10 functionality.
608/04/16Updated for v2.05 and changed standard rack P/N.
503/07/16Updated part numbers in figure B-1.
402/26/16
302/11/16Removed GTX 325.
212/14/15Reorganized manual.
105/08/15Experimental release.
Added information for vertical remote mount and other minor edits. Refer to
current revision description.
REVISION 9 CHANGE DESCRIPTION
SECTION CHANGE DESCRIPTION
1.2Added GTX 345 NV and GTX 345 NV w/GPS to table 1-2 “GTX 3X5 Units.”
Updated weights for GTX 335 and GTX 345 units in table 1-4 “Physical Characteristics Panel Mount Units.”
1.8
3.2Added GTX 345 NV and GTX 345 NV w/GPS to table 3-1 “GTX 3X5 Configurations.”
3.3Added GTX 345 NV and GTX 345 NV w/GPS to table 3-2 “Accessories Supplied.”
3.10
Updated weights for GTX 335 and GTX 345 units in table 1-5 “Physical Characteristics Remote Mount Units.”
Updated Main and ADS-B boot block part numbers in table 1-14 “Applicable P/Ns.”
Added “Roll Angle” and “Mach” to figure 3-1 “Air Data Discrete Priority Order.”
Moved Altitude Sources 1 question above Air Data Select question of figure 3-2 “Pressure
Altitude Priority Order.”
190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page ii
Record of Revisions
SECTION CHANGE
Updated figure 6-5 “Interface Group.”
Added G1000 NXi to description of REMOTE FMT 1 and REMOTE FMT 2 in table 6-1 “RS-232
Channel 1 through 3 Selections.”
Added AVIATION FORMAT 2 to table 6-1 “RS-232 Channel 1 through 3 Selections.”
6.5
6.6
6.7
6.9
Appendix B
Added note [4] and note [5] to table 6-1 “RS-232 Channel 1 through 3 Selections.”
Added “P3251 or P3252” to pin selection of ALT ALERT function in table 6-8 “Discrete
Outputs.”
Added “or P3252” to pin selection of TRFC STBY, TRFC TEST, and ADS-B OUT function in
table 6-8 “Discrete Outputs.”
Updated figure 6-13 “Unit Group.”
Updated information in “Enhanced Surveillance” section for clarity.
Added figure 6-23 “Keypad Backlight and Minimum Level Page.”
Added figure 6-24 “Photocell Transition, Slope, and Offset Page.”
Added figure 6-25 “Lighting Bus Input Voltage Page.”
Added figure 6-26 “Default Backlight and Contrast Offset Page.”
Updated figure 6-36 “ADS-B Group.”
Added “Acft Stall Method” and “Acft Stall Speed” sections.
Added GTX 345 NV and GTX 345 NV w/GPS to figure B-1 “GTX 3X5 GPS Panel Mount
Assembly.”
DESCRIPTION
C.1
C.2Updated notes for GNS 400W/500W Series RS-232 data format in table C-2 “GPS Source.”
Updated notes for GNS 400W/500W Series RS-232 data format in table C-1 “ADS-B In
Display.”
190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page iii
Warnings, Cautions, and Notes
WARNING
WARNING
NOTE
WARNING
CAUTION
NOTE
INFORMATION SUBJECT TO EXPORT CONTROL LAWS
This document may contain information which is subject to the Export Administration Regulations (EAR) issued by the
United States Department of Commerce (15 Code of Federal Regulations (CFR), Chapter VII, Subchapter C) and which
may not be exported, released, or disclosed to foreign nationals inside or outside of the United States without first
obtaining an export license.
DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES
A WARNING MEANS INJURY OR DEATH IS POSSIBLE IF THE INSTRUCTIONS ARE
NOT FOLLOWED.
A CAUTION MEANS THAT DAMAGE TO THE EQUIPMENT IS POSSIBLE.
A note provides more information.
THIS PRODUCT’S PACKAGING AND COMPONENTS CONTAIN CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS, OR REPRODUCTIVE HARM. THIS NOTICE IS
PROVIDED IN ACCORDANCE WITH CALIFORNIA'S PROPOSITION 65. IF YOU HAVE ANY QUESTIONS OR
WOULD LIKE ADDITIONAL INFORMATION, REFER TO GARMIN’S WEBSITE,
WWW.GARMIN.COM/PROP65
PERCHLORATE MATERIAL – SPECIAL HANDLING CAN APPLY.
REFER TO WWW.DTSC.CA.GOV./HAZARDOUSWASTE/PERCHLORATE
All screen shots used in this document are current at the time of publication. Screen shots are intended
to provide visual reference only. All information depicted in screen shots, including software file names,
versions, and part numbers, are subject to change.
.
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190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page iv
Table of Contents
1 SYSTEM OVERVIEW ............................................................................................................................................ 1-1
1.6TIS System Capabilities ........................................................................................................................... 1-5
1.12 GPS Specifications (Units with Internal GPS Only).................................................................................. 1-11
1.13 Power Specifications............................................................................................................................. 1-12
3.5Necessary Installation Materials and Accessories Not Supplied ................................................................ 3-9
3.6Necessary Special Tools .......................................................................................................................... 3-9
3.11 ADS-B In Considerations....................................................................................................................... 3-22
3.12 Bluetooth Considerations (GTX 345R Only)........................................................................................... 3-23
3.13 Field Enablements ................................................................................................................................ 3-23
4.2Backshell Assembly Parts ........................................................................................................................ 4-2
5.4Lighting Bus ........................................................................................................................................... 5-7
5.7Serial Data Interfaces .............................................................................................................................. 5-9
5.8Suppression Bus ................................................................................................................................... 5-11
5.11 Time Mark............................................................................................................................................ 5-11
5.13 USB Interface ....................................................................................................................................... 5-12
PPENDIX A DATA FORMATS ................................................................................................................................A-1
A.1RS-232 Air Data Input Format................................................................................................................. A-1
PPENDIX B GTX 3X5 MECHANICAL DRAWINGS .................................................................................................... B-1
A
PPENDIX C EQUIPMENT COMPATIBILITYAND CONFIGURATION ................................................................................ C-1
C.1ADS-B In Displays ................................................................................................................................... C-2
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List of Figures
Figure 3-1 Air Data Discrete Priority Order ....................................................................................................... 3-13
Figure 3-2 Pressure Altitude Priority Order ....................................................................................................... 3-14
Figure 3-3 Garmin Label on Remote Unit ......................................................................................................... 3-23
Figure 3-4 GPS Locations of Antennas ............................................................................................................. 3-26
Figure 6-11 Discrete In Page .............................................................................................................................. 6-12
Figure 6-12 Discrete Out Page ........................................................................................................................... 6-13
Figure 6-13 Unit Group ..................................................................................................................................... 6-14
Figure 6-15 Altitude and Temperature Units Page.............................................................................................. 6-15
Figure 6-16 Installation and VFR ID Page............................................................................................................ 6-15
Figure 6-17 Altitude Alert Deviation and Restore Page ....................................................................................... 6-16
Figure 6-39 Aircraft Length and Width Page ...................................................................................................... 6-29
Figure 6-40 1090ES Out Control and UAT Out Remote Control Page ................................................................ 6-29
Figure 6-41 1090ES In Capable and UAT In Capable Page ................................................................................. 6-29
Figure 6-42 ADS-B In Processing Page ...........................................................................................
Figure 6-43 Aircraft Tail Number and Address Page ........................................................................................... 6-30
Figure 6-44 Allow Pilot to Edit Flight ID Page ..................................................................................................... 6-30
Figure 6-45 Default Flight ID and Flight ID Prefix Page ....................................................................................... 6-31
.................... 6-30
190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page vii
List of Figures
Figure 6-46 Diagnostics Group .......................................................................................................................... 6-32
Table 3-11 Air Data Select Source Priority ............................................................................................................ 3-14
Table 3-19 Static Air Temperature Source Priority ................................................................................................ 3-17
Table 3-20 Total Air Temperature Source Priority ................................................................................................. 3-18
Table 5-13 External Suppression Bus Pin .............................................................................................................. 5-11
Table 5-14 OAT Input and Output ....................................................................................................................... 5-11
Table 5-15 Audio Inputs and Outputs.................................................................................................................. 5-11
Table 5-16 Time Mark Outputs ............................................................................................................................ 5-11
Table 5-17 Configuration Module Inputs and Outputs ......................................................................................... 5-12
Table 5-18 USB Inputs and Outputs..................................................................................................................... 5-12
Table A-4 EFIS Air Data........................................................................................................................................A-7
Table A-7 Transponder Control Format 1 .............................................................................................................A-8
Table A-8 Radio Altitude......................................................................................................................................A-8
190-01499-02GTX 3X5 Transponder TSO Installation Manual
Rev. 9Page x
List of Tables
Table C-9 Remote Control .................................................................................................................................C-12
Table E-1 ELS ...................................................................................................................................................... E-1
1.4.1 ADS-B Out .............................................................................................................................................. 1-4
1.4.2 ADS-B In ................................................................................................................................................. 1-4
1.4.3 Installation Approval for ADS-B Systems .................................................................................................. 1-4
1.6 TIS System Capabilities................................................................................................................................... 1-5
1.8 General Specifications.................................................................................................................................... 1-8
1.12 GPS Specifications (Units with Internal GPS Only) ......................................................................................... 1-11
1.13 Power Specifications .................................................................................................................................... 1-12
Garmin recommends installation of the GTX 3X5 by a Garmin–authorized installer. Garmin will not be
liable for damages that result from improper or negligent installation of the GTX 3X5 to the extent
permitted by law.
Mechanical and electrical information to install the GTX 3X5 into an aircraft is provided in this manual. It is not
equivalent to an approved airframe-specific maintenance manual, installation design drawing, or installation data
package. The content of this manual assumes use by competent and qualified avionics engineering personnel and/or
avionics installation specialist using standard maintenance procedures in accordance with Title 14 of the Code of
Federal Regulation and other related accepted procedures.
The GTX 3X5 models include Mode S/ES transponders. Mode S/ES models have an optional internal GPS/SBAS receiver. Model names with an R indicate remote
mount units. These units do not include a display or keypad.
Table 1-1 GTX 3X5 Units
FeatureGTX 335
Mode S/ESXXXXXXXXXXX
ARINC 429 data concentratorXXXXXXXXXXX
ADS-B In with alerting
(UAT and 1090 MHz)
Connext (via Bluetooth) XXXXXX
FIS-BXXXXXX
TIS trafficXXXXX
ADS-B In and TAS/TCAS traffic
integration
HSDB forwardingXXXXXX
Pressure sensor module
(optional)
Flight timersXXXXXXX
Audio outputXXXXXXXXXXX
Interface to Garmin display
products
XXXXXXXXXXX
XXXXXXXXXXX
GTX 335 NVGTX 335
w/GPS
GTX
335R
GTX 335R
w/GPS
GTX 345
XXXXXX
XXXXXX
GTX 345
w/GPS
GTX 345R
GTX 345R
w/GPS
GTX 345 NVGTX 345
NV w/GPS
Shows pressure altitude,
outside air temperature, and
density altitude
References made to GTX 3X5 apply to all GTX 3X5 models, except when noted.
The term squitter refers to a burst or broadcast of aircraft-tracking data that is periodically transmitted by a Mode S
transponder without radar interrogation. The GTX 3X5 Mode S/ES models transmit ADS-B Out ES. These transmissions
contain additional aircraft information that includes GPS based location information.
Abbreviations
These abbreviations and acronyms are used in this document.
ACAdvisory Circular
ADFAutomatic Direction Finder
ADS-BAutomatic Dependent Surveillance-Broadcast
ADS-RAutomatic Dependent Surveillance-Rebroadcast
AFMSAircraft Flight Manual Supplement
AIRMETAirmen Meteorological Information
APIAppliance Project Identifier
ATCRBSAir Traffic Control Radar Beacon System
BDSComm-B Data Selector
CDTI Cockpit Display of Traffic Information
CFRCode of Federal Regulations
CGCenter of Gravity
CONUSContinental United States
CS-ACNSCertification Specification and Acceptable Means of Compliance for Airborne Communication,
Navigation and Surveillance
CSAConflict Situational Awareness
DCDirect Current
DMEDistance Measuring Equipment
ELSElementary Surveillance
EHSEnhanced Surveillance
EQFEnvironmental Qualification Form
ESExtended Squitter
FAAFederal Aviation Administration
FCCFederal Communications Commission
FCUFlight Control Unit
FIS-BFlight Information Services-Broadcast
FMSFlight Manual Supplement
GAEGarmin Altitude Encoder
GNSSGlobal Navigation Satellite System
GPSGlobal Positioning System
GTXGarmin Transponder
HSDBHigh Speed Data Bus
LATLatitude
LONLongitude
MCPMode Control Panel
METARMeteorological Aviation Report
MFDMultifunction Display
MSRMessage Success Rate
NOTAMNotice to Airmen
NEXRADNext Generation Radar
OATOutside Air Temperature
PEDPortable Electronic Device
PIREPPilot Weather Report
POHPilot Operating Handbook
RAIMReceiver Autonomous Integrity Monitoring
RFMSRotorcraft Flight Manual Supplement
SATCOMSatellite Communications
SBASSatellite-Based Augmentation System
SIGMETSignificant Meteorological Information
SILSource Integrity Level
SPISpecial Position Indicator
SUASpecial Use Airspace
TAFTerminal Area Forecast
TASTraffic Advisory System
TCASTraffic Collision Avoidance System
TISTraffic Information Service
TIS-BTraffic Information Service-Broadcast
TSOTechnical Standard Order
UATUniversal Access Transceiver
UHFUltra-High Frequency
USBUniversal Serial Bus
VHFVery High Frequency
VSWRVoltage Standing Wave Ratio
WAASWide Area Augmentation System
System Overview
1.4ADS-B Capabilities
1.4.1ADS-B Out
The GTX 335 and GTX 345 include ADS-B Out capabilities when installed with an approved internal or external GPS
position source.
1.4.2ADS-B In
For all ADS-B In data reception capabilities, the GTX 345 includes receivers for both the UAT and the 1090 MHz
frequency bands. The GTX 345 receives ADS-B transmissions from other ADS-B Out equipped aircraft, ADS-R, and
TIS-B information from ground stations. Traffic information received from these transmissions supply compatible
ADS-B In data to CDTIs to show the pilot.
1.4.3Installation Approval for ADS-B Systems
The conditions and tests necessary for TSO approval of the GTX 3X5 are minimum performance standards. It is the
responsibility of the installer to determine if the aircraft installation conditions are within the TSO standards. TSO units
must have separate approval to install in an aircraft. The GTX 3X5 can be installed only in compliance with
14 CFR Part 43 or the applicable airworthiness requirements.
All GTX 3X5 unit functions are design-approved under the TSO. Changes or modifications to any unit that are not
approved can void the compliance to necessary regulations and authorization for continued equipment usage.
It is the installer’s responsibility to make sure the ADS-B Out system installation is compliant with
14 CFR 91.227 and to make sure compatibility between the GTX 3X5 and the ADS-B Out equipment. For compatible
equipment that is applicable for 14 CFR 91.227-compliant installations in accordance with AC 20-165A refer to
Garmin ADS-B Out Compatible Equipment. FIS-B information is for pilot-planning and pilot near-term decisions. The
information shown are areas of inclement weather that are out of visual range or are not easily seen.
The GTX 345 receives FIS-B information from UAT ground stations in the United States. A direct line-of-sight between
the ground station and aircraft is necessary to receive FIS-B data. The data is not available at ground level in some
locations. The GTX 345 supplies the data to compatible displays. Depending on the CDTI it can show:
• NOTAM (includes TFRs)
•AIRMET
• SIGMET
•SUA
• METAR
•TAFs
•PIREP
• Winds/Temps Aloft
• Regional NEXRAD
• CONUS NEXRAD
1.6TIS System Capabilities
The GTX 335 supplies information about nearby traffic through the FAA provided radar based TIS. Advisory traffic
information is shown on a compatible Garmin display. Garmin units capable to show TIS traffic include:
Gray code altitude input [3]I [3]11
Suppression busI/O11
1PPSO11
OAT inputI11
Audio outputO11
Configuration module, GAE module interface [2]I/O11
USB interfaceI/O11
Lighting bus inputI11
Switched power outputO11
Input/
Output
O11
I22
I [3]1515
O11
I/O [1]24
GTX 335
Qty
GTX 345
Qty
[1] Can be configured to be either input or output on a per-discrete basis.
[2] Use for either the configuration module or combination configuration module/GAE.
[3] The Gray code altitude input pins can be used for other functions when not used for Gray code.
It is the responsibility of the installing agency to obtain EQF necessary for the GTX 3X5.The form, P/N 005-00752-02, is
available at the Dealer Resource Center
Table 1-4 Physical Characteristics - Panel Mount Units
CharacteristicSpecification
Bezel height1.65 in. (42 mm)
Bezel width6.25 in. (159 mm)
Rack height (dimple to dimple)1.68 in. (43 mm)
Rack width6.30 in. (160 mm)
Depth behind panel with connectors (measured from face of aircraft
panel to rear of connector backshells)
GTX 335 weight (unit only)2.1 lb (0.95 kg)
GTX 335 with GPS weight (unit only)2.2 lb (1.00 kg)
GTX 335 with rack, backplate, and connectors2.9 lb (1.32 kg)
GTX 335 with GPS with rack, backplate, and connectors3.0 lb (1.36 kg)
GTX 345 weight (unit only)2.3 lb (1.04 kg)
GTX 345 with GPS weight (unit only)2.5 lb (1.13 kg)
GTX 345 with rack, backplate, and connectors3.2 lb (1.45 kg)
GTX 345 with GPS with rack, backplate, and connectors3.4 lb (1.54 kg)
Operating temperature range
Maximum operating altitude55,000 feet
Humidity95% non-condensing
CoolingExternal cooling not necessary
.
10.07 inches (256 mm)
-40°F to 158°F (-40°C to +70°C)
For additional details, refer to the EQF.
Table 1-5 Physical Characteristics - Remote Mount Units
CharacteristicSpecification
Height, standard mount1.7 inches (43 mm)
Width, standard mount6.3 inches (160 mm)
Length, standard mount (unit, mount, and connector backshells)9.9 inches (252 mm)
Height, unit and vertical remote mount6.6 inches (167 mm)
Width, unit and vertical remote mount1.8 inches (46 mm)
Length, unit and vertical remote mount (unit, mount, connector
backshell(s))
GTX 335R weight (unit only)1.9 lb (0.86 kg)
GTX 335R with GPS weight (unit only)2.0 lb (0.91 kg)
GTX 335R weight with standard mounting tray, backplate, and
connectors
GTX 335R with GPS weight with standard mounting tray, backplate,
and connectors
GTX 335R weight with vertical remote mount, backplate, and
connectors
GTX 335R with GPS weight with vertical remote mount, backplate,
and connectors
GTX 335R weight with GX000 remote mount, nut plates, backplate,
and connectors
GTX 335R with GPS weight with GX000 remote mount, nut plates,
backplate, and connectors
GTX 345R weight (unit only)2.2 lb (1.00 kg)
GTX 345R with GPS (unit only)2.3 lb (1.04 kg)
GTX 345R weight with standard mounting tray, backplate, and
connectors
GTX 345R with GPS with standard mounting tray, backplate, and
connectors
GTX 345R weight with vertical remote mount, connector backplate,
and connectors
GTX 345R with GPS weight with vertical remote mount, connector
backplate, and connectors
GTX 345R weight with GX000 remote mount, nut plates, backplate,
and connectors
GTX 345R with GPS weight with GX000 remote mount, nut plates,
backplate, and connectors.
Operating temperature range
Maximum operating altitude55,000 feet
Humidity95% non-condensing
CoolingExternal cooling not necessary
12.7 inches (321 mm)
2.7 lb (1.22 kg)
2.8 lb (1.27 kg)
3.1 lb (1.41 kg)
3.3 lb (1.50 kg)
2.7 lb (1.22 kg)
2.9 lb (1.32 kg)
3.0 lb (1.36 kg)
3.2 lb (1.45 kg)
3.5 lb (1.59 kg)
3.6 lb (1.63 kg)
3.1 lb (1.41 kg)
3.2 lb (1.45 kg)
-49°F to 158°F (-45°C to +70°C)
For additional details, refer to the EQF.
Left: 45°
Right: 45°
From top: 30°
From bottom: 10°
Table 1-7 GAE Specifications
CharacteristicSpecification
Dimensions1.12 x 0.62 x 0.57 inches (28.4 x 15.7 x 14.5 mm)
Weight0.8 ounces (with mounting hardware and harness)
Operating Temperature-40°F to +158°F (-40°C to +70°C)
Altitude30,000 feet maximum
VoltageSupplied by GTX 3X5 transponder
CurrentSupplied by GTX 3X5 transponder
Resolution1 foot
System Overview
1.9Transponder Specifications
Table 1-8 Transponder Specifications
CharacteristicSpecification
Transmitter frequency1090 MHz ± 1 MHz
Transmitter power
Receiver frequency
Receiver sensitivity
External suppression input
External suppression output
125 W min at antenna, with max 2dB cable loss
250 W nominal at unit
1030 MHz + 0.01 MHz
-74 dBm nominal for 90% replies
> 10 VDC to suppress
>
Frequency978 MHz +
ModulationContinuous phase FSK, h = 0.6, raised cosine shaping, a = 0.5
Data rate1.04 Mbps
Sensitivity-96 dBm for 90% MSR
20 ppm
1.111090 MHz Receiver Specifications
Table 1-10 1090 MHz Receiver Specifications
CharacteristicSpecification
Frequency1090 MHz +
ModulationBinary pulse-position
Data rate1 Mbps
Sensitivity-81 dBm for 90% MSR
1 MHz
System Overview
1.12GPS Specifications (Units with Internal GPS Only)
Table 1-11 GPS Receiver Specifications
CharacteristicSpecification
Number of channels15 (12 GPS and 3 GPS/SBAS)
Frequency1575.42 MHz L1, C/A code
Sensitivity (acquisition, no interference)
Sensitivity (drop lock)-144 dBm
Dynamic range>20 dB
LAT/LON position accuracy<1.25 meter RMS horizontal, <2 meter vertical, with SBAS
Velocity1000 knots maximum (above 60,000 ft)
TTFF (Time To First Fix)1:45 min. typical with current almanac, position, and time
Reacquisition10 seconds typical
Position update interval0.2 sec (5 Hz)
1PPS (Pulse Per Second)± 275 nsec of UTC second
DatumWGS-84
SATCOM compatibilitySATCOM compatibility is dependent on antenna selection
Antenna power supply35 mA typical, 40 mA max at 4.7 VDC
GTX 3X5 units require an input voltage of between 9 VDC and 33 VDC. The maximum input power and current is
based upon maximum reply rates. Input power and current does not include the switched power output.
Table 1-12 Power Specifications
UnitCharacteristic
Power input8 W typical, 15 W maximum
GTX 335
GTX 335, GPS
GTX 345
GTX 345, GPS
GTX 3X5, GPS [1]
[1] KEEP ALIVE input only applies to units that have an internal GPS.
Input current, typical0.57 A0.29 A
Input current, maximum0.86 A0.43 A
Power input10 W typical, 17 W maximum
Input current, typical0.72 A0.36 A
Input current, maximum1.22 A0.61 A
Power input10 W typical, 18 W maximum
Input current, typical0.72 A0.36 A
Input current, maximum1.30 A0.65 A
Power input12 W typical, 20 W maximum
Input current, typical1.07 A0.54 A
Input current, maximum1.43 A0.72 A
KEEP ALIVE input current, typical65 uA20 uA
KEEP ALIVE input current, maximum85 uA40 uA
The GTX 3X5 meets compliance with the TSO(s) when interfaced with equipment and installed in accordance with the
requirements and limitations as outlined in this manual.
FIS-B information, including weather information, NOTAMs, and TFR areas, are intended to assist in long- and nearterm planning decision making. The system lacks sufficient resolution and updating capability necessary for aerial
maneuvering associated with immediate decisions.
The Appliance Project Identifier (API) for the GTX 3X5 is GMN-01216. The API is used for project identification with the
FAA. To identify appliance approvals refer to applicable hardware and software part numbers.
Air Traffic Control Radar Beacon System / Mode Select
(ATCRBS/Mode S) Airborne Equipment
Airborne Navigation Sensors Using the Global
Positioning System Augmented by the Satellite Based
Augmentation System
Universal Access Transceiver (UAT) Automatic
Dependent Surveillance – Broadcast (ADS-B) Equipment
Operating on Frequency of 978 MHz
Aircraft Flight Information Services – Broadcast (FIS-B)
Data Link System and Equipment
Extended Squitter Automatic Dependent Surveillance –
Broadcast (ADS-B) and Traffic Information Service –
Broadcast (TIS-B) Equipment Operating on the Radio
Frequency of 1090 Megahertz (MHz)
Main software006-B1607-0( )
ADS-B software006-B1797-0( )
GPS software006-B1827-0( )
Main boot block006-B1607-BA through -BZ
ADS-B boot block006-B1797-BA through -BZ
GPS boot block006-B1827-B( )
Main CLD006-C0153-22 through -2( )
ADS-B CLD 006-C0157-21 through -2( )
Table 1-15 TSO/ETSO Deviations
TSODeviation
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
TSO-C88b
TSO-C145d
TSO-C154c
TSO-C157a
TSO-C166b
TSO-C195a
2. Garmin is granted a deviation from the TSO to use RTCA DO-160G instead of earlier versions of
RTCA/DO-160 as the standard for Environmental Conditions and Test Procedures for Airborne
Equipment.
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
2. Garmin is granted a deviation from TSO-C145d section 7.a that requires “…provide one copy or
on-line access to the data in paragraphs…5.f through 5.h of this TSO.”
3. Garmin is granted a deviation from RTCA/DO-229D Change 1 section 2.1.1.10 to use GPS
antennas that meet Garmin Minimum Performance Specifications (Document No.
004-00287-00).
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
2. Garmin is granted a deviation from RTCA DO-267A section 3.6.2.3 to use Product File Identifier
in addition to APDU Number when reconstructing a Product File from linked APDUs as specified
by Aerodrome and Airspace FIS-B Product Definitions, v4.00, dated May 2009.
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
2. Garmin is granted a deviation from the TSO-C166b not to process ADS-R as required by RTCA/
DO-260B section 2.2.18.
3. Garmin is granted a deviation from RTCA/DO-260B section 2.1.10 to meet the transponder
function requirements of RTCA/DO-181E instead of RTCA/DO-181D.
1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and Date
of Manufacture, Deviation and Software Part Number on the exterior of the unit.
The following are declared non-TSO functions, these non-TSO functions as defined in this manual have been evaluated
with the TSO functions. The design data for these non-TSO functions has been accepted by the FAA when these nonTSO functions are installed in accordance with the guidance and limitations provided in this manual.
The GTX 3X5 includes the following non-TSO functions.
• TIS-A (GTX 335)
• Wireless data conversion (Bluetooth interface) (GTX 345)
1.14.2 Design Assurance Levels
Table 1-16 Software Design Assurance Levels
System Function
Mode S transponder functionalityC
Display of TIS-A traffic dataC
Flight information data (FIS-B, including weather information) processing and output to
display
Display of outside air temperature (static)C
Flight timersC
1090 ADS-B transmissionC
1090/UAT ADS-B receptionB
Correlation of TCAS traffic with ADS-B, ADS-R, and TIS-B trafficB
Conflict Situational Awareness (CSA) including visual and aural alertsB
1.14.3 Transmitter Grant of Equipment Authorization
CAUTION
NOTE
Table 1-18 Equipment Authorization
ModelFCC ID
GTX 335
GTX 335R
GTX 345
GTX 345R
1.15License Requirements
THE UHF TRANSMITTER IN THIS EQUIPMENT IS GUARANTEED TO MEET FEDERAL COMMUNICATIONS
COMMISSION ACCEPTANCE OVER THE OPERATING TEMPERATURE RANGE. MODIFICATIONS NOT
EXPRESSLY APPROVED BY GARMIN COULD INVALIDATE THE LICENSE AND MAKE IT UNLAWFUL TO
OPERATE THE EQUIPMENT.
System Overview
IPH-02133
IPH-02256
For non-US installations consult the local spectrum management agency for requirements.
The Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to eliminate radio station
license requirements for aircraft and ships. The GTX 3X5 installation must obey current transmitter licensing
requirements. In the US, to find out the specific details on whether a particular installation is exempt from licensing,
visit the FCC website http://wireless.fcc.gov/aviation.
If an aircraft license is necessary, apply for a license on FCC Form 404, Application for Aircraft Radio Station License.
The FCC also has a fax-on-demand service to supply forms by fax. The GTX 3X5 owner accepts all responsibility for
obtaining the proper licensing before using the transponder.
These documents are additional sources of information to install the GTX 3X5. The technician should read all related
reference materials along with this manual before unit installation. The documents in table 1-19 are found at Garmin’s
Dealer Resource Center
14 CFR 91.227 ADS-B Out Compatible Equipment190-01533-00
Antenna Minimum Performance Specification for Garmin’s GPS/WAAS
Receiver System
2.2 ARINC 429 Data Concentrator Function......................................................................................................... 2-1
The GTX 3X5 meets the minimum performance and quality control standards that are necessary by the TSOs in
section 1.14. Installation of the GTX 3X5 requires separate approval.
2.1HSDB Packet Forwarding
The GTX 345 HSDB interface is not approved for forwarding data whose failure condition for loss or malfunction is
classified as hazardous or catastrophic.
2.2ARINC 429 Data Concentrator Function
ARINC 429 data from the GTX 3X5 must not be used for any function whose associated failure is classified as
hazardous or catastrophic.