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Garmin GTX45R ADS-B In / Out Trandsponder - Remote Mount

Select Kit:
Standard KitStandard Kit + GPS


Complete ADS-B Solution for Experimental Aircraft

  • Integrates with G3XTM series flight displays for fingertip control and squawk code entry
  • Satisfies NextGen requirement for ADS-B “Out” when paired with a compatible GPS position source
  • Provides 1090 MHz ES (Extended Squitter) output for operations at any altitude, in airspace around the world
  • Supports dual-link ADS-B “In,” which provides the most complete traffic picture, plus subscription-free weather on select avionics, mobile devices and portables¹
  • Streams weather, traffic, GPS position and backup attitude via Connext® to Garmin Pilot™ and ForeFlight Mobile apps as well as aera® 795/796 and aera 660 portables
Outfitting your experimental or light sport aircraft to meet equipage rules for NextGen airspace just got easier — and more beneficial. With the GTX 45R ADS-B transponder, you have a simple solution with minimal expense, while also providing all the weather and traffic benefits of ADS-B “In” and Connext wireless cockpit integration.

Next Generation of Transponders for NextGen

The GTX 45R ADS-B transponder provides Mode S ES ADS-B “Out” when paired with your choice of compatible GPS position sources so you meet the Dec. 31, 2019, requirements for flight at any altitude, anywhere in the world. It provides more useful traffic surveillance data to ATC, including aircraft flight ID, position, altitude, velocity, climb/descent and heading information. Plus, it uniquely integrates with both your G3X™ Touch flight display and GTN™ 650, GTN 750 or GNS™ series navigator to provide advanced ADS-B traffic and subscription-free weather². GTX 45R also streams wireless traffic and weather to select Garmin portables and tablets running Garmin Pilot and ForeFlight Mobile apps.

Integrated Operation

With the remote-mounted GTX 45R, use your G3X or G3X Touch for transponder control, including squawk code entry. Meanwhile, GTX 45R provides the capability to display various ADS-B “In” benefits on your panel — whether you have a single G3X Touch or a trio of G3X Touch displays and a GTN. And with SVX™ 3D Vision technology on G3X Touch, traffic targets also appear in context on your primary flight display.

The extra-precise GPS position reference required for ADS-B can be provided by a GTN 650/750 navigator, GNS series WAAS navigator or a GPS 20A ADS-B position source. In any event, GTX 45R offers a simple, minimally intrusive ADS-B solution to fit your aircraft.

Clear View of Traffic

The GTX 45R transponder includes a dual-link ADS-B “In” receiver, so it “hears” both frequencies (978 MHz and 1090 MHz) authorized for ADS-B operations in the U.S. Not only does this provide the most complete traffic picture from aircraft transmitting on either frequency, but it also enhances your aircraft’s ability to access ADS-B ground station transmissions and services from virtually anywhere.

You’ll receive ADS-B traffic position reports (and threat-level symbology) to help you “see and avoid” converging targets in busy airspace. Spoken audio alerts call out potential flight path conflicts (“traffic, 10 o’clock, same altitude, 2 miles”) to get you looking in the right direction. Meanwhile, on your display, our patent-pending TargetTrend™ relative motion display2 offers a faster, more intuitive way of judging target trajectories and closure rates in relation to your flight path. As an added safety feature, our TerminalTraffic™ technology provides a comprehensive picture of ADS-B equipped aircraft and ground vehicles in the airport environment. ADS-B equipped aircraft in flight are easily distinguished from ground vehicles and taxiing aircraft, which are displayed using distinct colors and symbols.

Weather Wise

In addition to traffic, GTX 45R also makes available subscription-free weather that can be overlaid on your flight display. The ADS-B weather link is continuously broadcast on the 978 MHz Universal Access Transceiver (UAT) frequency and is similar to the basic services offered by leading commercial satellite weather providers, including NEXRAD imagery, METARs, TAFs, winds and temperatures aloft, PIREPs, NOTAMs and more².

Portable and Mobile Advantages

With built-in Connext technology, GTX 45R allows you to wirelessly stream ADS-B “In” benefits, including advanced traffic and weather, to Garmin GPS portables. Portables include aera® 796, aera 795 and aera 660 as well as the most popular apps in the industry, Garmin Pilot and ForeFlight Mobile. Plus, GTX 45R internal sensors provide backup attitude information to compatible aera portables and Garmin Pilot to enable SVX synthetic vision view.

Advanced Design

The GTX 45R transponder is an all solid-state design, which makes for lower power consumption and enhanced reliability, compared to earlier-generation transponder technology. It uses the GSU 25 Air Data Attitude Heading Reference System (ADAHRS) for IFR altitude-encoding information. Plus, its remote-mounted design makes installation easy, saving you valuable panel space in your aircraft. Refer to the Installation Guide for important guidance about optimal mounting location of GTX 45R in your aircraft.

Now the industry’s most comprehensive line of ADS-B solutions includes an advanced transponder — optimized for your experimental and light sport aircraft — that unlocks the capabilities to get the most from your airplane, every time you fly.

¹ADS-B “In” traffic and weather not available with G3X legacy flight displays
²Limited to coverage in the U.S.


GTX 45R Display Compatibility

DISPLAY ADS-B & TIS-B Traffic FIS-B Products Remote Transponder Control TargetTrend™ TerminalTraffic™
G3X Touch 60 targets¹ Regional NEXRAD, CONUS NEXRAD, METARs, TAFs, PIREPs, Winds/Temperatures Aloft, NOTAMs, AIRMETs, SIGMETs, TFRs Yes Yes Yes
GTN Series 60 targets¹ Regional NEXRAD, CONUS NEXRAD, METARs, TAFs, PIREPs, Winds/Temperatures Aloft, NOTAMs, AIRMETs, SIGMETs, TFRs No Yes Yes
GNS 430/530 WAAS Series 8 targets²³ Regional NEXRAD, CONUS NEXRAD, METARs, TAFs No No No
Output for GMX 200/MX20 Up to 60 targets¹ Regional NEXRAD, METARs, TAFs No No No


Physical & Performance

  • Physical Dimensions (unit, rack, connectors): 1.65” x 6.30” x 9.9” (42 x 160 x 224 mm)
  • Weight (unit, rack, connectors): 2.8/2.9 lbs (1.27/1.32 kgs)
  • Voltage range: 14/28 VDC (18/20 W Max)
  • Transmit power: 200 W minimum
  • Tempertaure: -45°C to +70°C
  • Operating altitude: To 55,000 ft (16,800 m)
  • Cooling input: Not required
  • Environmental Compliance (TSO Approved): DO-160G
  • Software compliance (TSO Approved): DO-178 Levels B, C, D, E
  • Hardware compliance (TSO Approved): DO-254 Level C
  • TSO compliance (Approved): TSO-C88b (w/opt. alt. encoder); TSO-C112e (Class 1, Level 2els); TSO-C154c (Class A1S); TSO-C157a (Class 1); TSO-C166b (Class A1S); TSO-C195a (Class C1,C2,C3,C4)
  • Mount type: Remote
  • Transponder type: Mode A/C, S and ES
  • Squawk code selection: Remote entry
  • Traffic Information Services (TIS) alerts compatible: Yes

Transponder Features

Solid state transmitter (more efficient, longer life): YesAural alerts: YesAutomtatic ALT/GND mode: YesU.S. subscription-free weather and traffic: Yes1090 MHz ADS-B Out: YesDual-link 1090 MHz and 978 MHz UAT ADS-B In: YesTAS/TCAS traffic integration with ADS-B In: Yes
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All present and accounted for....not installed yet

Martin F
December 28, 2020


Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can I also manually enter squawk code thru my GTN 625 to the GTX 45R?

The GTX 45R is specifically intended for the G3X system and will not directly interface with the GTN 625.

Q: What antenna is recommended for the GTX 45R to utilize all functionality?

The unit will require two antennas. One for the transponder portion and one for the GPS portion. Per the manual you can use CI-105 11-17965 (Transponder) GA 35 11-09701 (GPS).

Q: I have a G3X touch system, with one transponder 45R and one GPS 20A, connected with the GA35 antenna. Do I need to install some type of GDL 39R/50R/52R ADS-B traffic/weather receiver to have the ADSB in / out working?

No additional unit is required. The 45R box is in and out ADS-B.

Q: Does the GTX 45R come with a mounting rack?

Per the installation manual, yes, a mounting rack is included.

Q: What is the difference between the GTX 345 Remote and the GTX 45R?

The GTX 45R is for experimental aircraft only, meant to integrate to experimental systems like the G3X. The GTX 345R is a certified transponder but can be used in both applications.

Q: Can a Comant Comdat Ci-25 80-200 (Part # 11-11545) be used in lieu of the Ci-105 and GA35?

Unfortunately it cannot as the CI 105 is a transponder antenna and part number 11-11545 is a COM/GPS antenna.

Q: Can I control this with a GNS 480waas as it controls my GTX327 now?

No, this is intended to be used with the G3X system.

Q: Does the GTX 45R require a separate Altitude Encoder?

If this is installed with a G3X system, it will not need an altitude encoder. Altitude data will be provided via the GSU 25 RS-232 port 3 to port 1 of the GTX 45R transponder.

Q: Does the GTX 45R come with the connector kit?

Yes, this comes with a connector kit.

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