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Avidyne - AXP340 - Mode S Transponder - Class 1 - Level 2 Datalink - slide-in replacement for existing KT76A/KT78A transponders

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The AXP340 transponder is a panel-mounted Class 1 Mode S Level 2 Datalink Transponder, with support for 1090MHz Extended Squitter (ES), that meets all the current requirements for Mode S elementary surveillance transponders for both IFR and VFR flight
580,179.60 din.
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580,179.60 din.

Product Description


Avidyne AXP340 Mode S Transponder

The AXP340 transponder is a panel-mounted Class 1 Mode S Level 2 Datalink Transponder, with support for 1090MHz Extended Squitter (ES), that meets all the current requirements for Mode S elementary surveillance transponders for both IFR and VFR flight. As a slide-in replacement for existing KT76A/KT78A transponders, the AXP340 is designed to easily upgrade existing Mode A/C equipment to Mode S, while adding additional functionality like a Direct-entry Numeric Keypad, Pressure Altitude & GPS Lat/Lon readout, Flight ID entry, one-touch VFR code entry, an easy-to-use Stop Watch Timer, Flight Timer, and Altitude Alerter.

Meeting the Mandate for ADS-B

The AXP340 also supports the latest Version 2 1090 MHz Automatic Dependent Surveillance Broadcast (ADS-B) Extended Squitter, known as “ADS-B out”. Equipping with ADS-B Out will be required in most U.S. airspace by 2020. The AXP340, when linked to a suitable GPS receiver, transmits position information to appropriately-equipped ground stations and other aircraft. This provides improved airborne surveillance, provides vital information for airport ground surveillance, and is a key feature of future airspace plans.

Avidyne's Stack avionics

The AXP340 provides an affordable and lightweight Mode S Surveillance and ADS-B Out solution for fixed wing and helicopter operators.

The AXP340 is a slide-in replacement for the venerable KT76A transponder, making it a great choice for upgrades, as well as for new installations. (Additional wiring required for ADS-B functionality.)

Avidyne's Stack avionics

The Mode S Advantage

The AXP340 delivers 240 Watts of transmitter power, and responds to both legacy Mode A/C interrogations and to Mode S interrogations from both ground radar and airborne collision avoidance systems. In the Mode S environment (S stands for Select), a Mode S interrogator can selectively address a single transponder. This allows accurate position plotting with lower reply rates, which in turn reduces frequency congestion and interference.

Your 1090Mhz ADS-B Solution

Coupled with any of Avidyne‘s TAS600A ADS-B capable Traffic Advisory Systems, the AXP340 provides full ADS-B surveillance capability to meet the upcoming mandates for flight internationally and above and below FL180 in the U.S. The AXP340 transmits the required ADS-B Out signals including your aircraft’s GPS-derived position, along with ground track, ground speed and altitude information. The TAS600A provides ADS-B In, allowing you to receive the ADS–B signals from ground radar and from other 1090MHz ADS-B – equipped aircraft and display both ADS-B and non-ADS-B traffic simultaneously for optimal situational awareness and safety.

Avidyne ADS-B Solutions

The AXP340 & TAS600A combine to provide complete 1090MHz ADS-B solution. ADS-B & TAS traffic can be displayed on a wide range of displays including Avidyne’s EX600 and MHD300 (shown here), providing the highest level of situational awareness and safety.


• Width: 6.30" (160mm)
• Height: 1.57" (40mm)
• Depth: 9.40" (239mm)

• 2.98 lbs (1.35 kg)

• Class 1 Mode S Level 2es Datalink
• Elementary Surveillance

• TSO C112d, TSO C166b
• ETSO 2C112d, ETSO C166b

• ED73E, DO160G, DO178B level B, DO181E, DO254 Level C, DO260B, AC 20-165 ADS-B Out

10 – 33 V
• Idle: 0.22 A, Active: 0.45 A
• 240W nominal at connector

• -20 to +55 C, 35,000ft
• No external cooling fan required

GPS Compatibility
• Avidyne GPS (including R9)
• Garmin GNS430W/530W Series

Other Interfaces
• Gray Code & Serial Altitude Inputs
• Serial Altitude Output
• External Standby Input
• Weight on Wheels Input
• External Ident Input

Additional Information

Additional Information

P/N 850-00219-000
Delivery 3-4 weeks after placing order
Hazardous No
Oversize No
Manufacturer AVIDYNE
Special Price No


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