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Garmin GTX345 Remote Digital Transponder For Experimental Aircraft

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Overview

Note: The GTX 335/345 can only be sold to experimental aircraft. Certified aircraft must purchase this unit from a shop certified by Garmin to perform installations.

Remote-mount Transponder Solution for ADS-B “Out” and “In”
  • 1090 MHz ADS-B “Out” enables aircraft to operate at any altitude, in airspace around the globe
  • Combines Mode S Extended Squitter (ES) transponder and optional WAAS/GPS position source in a single unit
  • Provides access to dual-link ADS-B “In” traffic and subscription-free weather on compatible displays
  • Wirelessly stream weather, traffic, GPS position and backup attitude via Connext™ link to Garmin Pilot™ and ForeFlight Mobile apps as well as the aera® 795/796 Garmin portables
  • Compatible with a variety of Garmin cockpit displays – including G1000® and GTN™ 750/650 series – which offer transponder code entry and control
With the introduction of the GTX 345R remote-mounted Mode S Extended Squitter (ES) transponder, Garmin provides the ideal upgrade path for aircraft operators looking to satisfy NextGen requirements for ADS-B “Out” – while providing all the weather and traffic benefits of ADS-B “In” with select G1000, GTN 750/650 and other 3rd party avionics. What’s more, the GTX 345R is also optionally available with a built-in WAAS GPS position source, so everything needed to meet the ADS-B equipage rules can be provided with this all-in-one upgrade package installation.

Your Transition to NextGen Made Simple
Offering more fielded ADS-B solutions than any other brand in the industry, Garmin is committed to making the transition to NextGen airspace as seamless and cost-efficient as possible. The IFR-certified GTX 345R is a prime example. It’s an all solid-state design, which makes for lower power consumption and enhanced reliability, compared to earlier-generation transponder technology. Plus, the unit’s 1090 MHz ADS-B “Out” transmission capability (using precise GPS-referenced positioning information) enables the GTX 345R to automatically output the more accurate, more dynamic traffic surveillance data that the NextGen airspace system requires. In addition, available ADS-B “In” reception unlocks even more capabilities for pilots, enabling them to display ADS-B traffic, weather and more on a variety of installed or portable displays.

Enhanced Traffic Surveillance
Using 1090 MHz extended squitter ADS-B “Out” transmission, the Garmin GTX 335R improves upon the existing transponder query system – while working seamlessly with existing ATC protocols – to provide ground controllers with considerably faster updates than traditional radar. And by simultaneously broadcasting this information to ADS-B “In” display-equipped pilots, it enables them to essentially see the same traffic picture for their location that ATC is watching on the ground.

See the Benefits of ADS-B “In”
As an added bonus, the GTX 345R also makes available the subscription-free weather and traffic display capabilities enabled by ADS-B “In” – which can be interfaced with compatible cockpit displays, including select G1000 and GTN 750/650 systems, or streamed wirelessly via Garmin Connext™ to our aera 796/795 series portables, as well as to popular tablets/mobile devices by way of apps such as Garmin Pilot™ or ForeFlight Mobile. 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. For example, you can access NEXRAD imagery, METARs, TAFs, winds and temperatures aloft, PIREPs, NOTAMs, and more¹: Along with this, you can also 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, two miles”) to get you looking in the right direction.

Dual-link Completes the Picture
The GTX 345R ADS-B receiver is a dual-link system. So, it can receive on 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 transmissions and services from virtually anywhere. When integrating an active traffic system with the GTX 345R, ADS-B traffic and active traffic targets are merged on the display to give pilots a truly comprehensive traffic picture.

ADS-B for Your Integrated Flight Deck
With a variety of compatibilities covering most fielded displays, our ADS-B enabled GTX series transponders offer the easiest NextGen upgrade path available from Garmin – especially for owners of select G1000-equipped aircraft. For these systems, the remote-mount GTX 345R interfaces with either the aircraft’s existing WAAS position source for navigation or uses an optional built-in WAAS position source to meet ADS-B “Out” requirements. The G1000 series displays interface with the remote GTX transponder to provide onscreen squawk code entry and control in the conventional manner. Depending on the software version installed, your Garmin glass displays can also support subscription-free weather on the MFD – as well as ADS-B traffic targets on both the MFD and PFD displays for aircraft equipped with Synthetic Vision Technology (SVT™).

Alerting and Altitude Encoding Made Simple
For added situational awareness, the GTX 345R incorporates a built-in audio output for audible traffic and altitude alerts1, which can be integrated into your existing audio panel. You can also pair the GTX series with an optional Garmin altitude encoder to satisfy data transmission requirements for IFR. As opposed to other transponders with altitude encoding built in, the Garmin altitude encoder mounts separately on the install rack. So, should the transponder ever require removal, there’s no need for the static line to be disconnected. Which, in turn, eliminates the need for a follow-on leak check – and thus helps minimize ongoing service costs.

An Easier Path to NextGen
The Garmin GTX 345R series is being FAA approved for installation on hundreds of today’s most popular aircraft makes and models. For decades, Garmin has led in the development and deployment of ADS-B technology. And when you compare all the options available, it’s clear that Garmin is committed to making your transition to ADS-B operations as simple, economical and worry-free as possible.

   
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Specifications

  • Physical dimensions (unit, rack, connectors); for panel mounts, depth is measured from face of instrument panel: 1.65” x 6.30” x 9.9” (42 x 160 x 224 mm)
  • Display type: N/A
  • Weight (unit, rack, connectors): 2.8/2.9 lbs (1.27/1.32 kg)
  • Voltage range: 14/28 VDC (18/20 W Max)
  • Transmit power: 200 W minimum
  • Temperature: 45° C to +70° C
  • Operating altitude: To 55,000 ft (16,800 m)
  • Cooling input: Not required
  • 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): Yes
  • Aural alerts: Yes
  • Automatic ALT/GND mode: Yes
  • Wireless connectivity to portable device using Garmin Pilot, ForeFlight or compatible Garmin portable: Yes
  • Subscription-free weather and traffic: Yes
  • Internal AHRS (non-certified): Yes
  • 1090 MHz ADS-B Out: Yes
  • Dual-link 1090MHz and 978MHz UAT ADS-B In: Yes
  • Built in GPS/WAAS receiver: Optional
  • Displays on G500/G600, GTN 650/750, GNS 430W/530W, and others: Yes
  • Pressure altitude encoder module (mounts to connector backplate): Optional
  • TAS/TCAS traffic integration with ADS-B In: Yes
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Q&A

Please note, Pilotshop'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. Pilotshop 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: Is the remote Garmin GTX 345 transponder compatible with GNS530W?

Per Garmin's literature: No. The GTX 345 is not compatible with the GNS 530W display.

Q: If I install a gtn 650 and the gtx 345 remote will that work /communicate with my 796 and satisfy the 2020 adsb out requirements? Also will it give me adsb in (traffic and weather) and display it on the 650 and my 796?

Yes, this will meet your ADS-B requirements and give you the free weather on traffic to display on both units.

Q: With a GTN635 and a Gtx345, will I be able to display ADSB In information on my G3X non-touch display?

The GTX 345 will send information to the G3X screen, which will display your ADS-B in features.

Q: For this remote mounted transponder, will Aircraft Spruce provide the GTX install tool (P/N 006-A0271-01) software and the GTX software updates with the purchase of a GTX 345R?

Once the purchase has been made, we can provide the install tool download but we do not provide software updates for the units. Please keep in mind that we can only sell this to experimental aircraft.

Q: Can this be installed by any avionic technician or it has to be Garmin certified technician?

Since it is intended for installation in experimental aircraft, any technician can do the install.

Q: Is the remote Garmin GTX 345 transponder compatible with GAE12?

Per Garmin install manual, the GAE 12 is compatible with GTX 3x5 series transponders.