Avidyne AXP340 Map Update and GPS Sync Guide

The Avidyne AXP340 is a panel-mounted Mode S transponder designed for ADS-B Out capabilities when integrated with certified GPS sources like the Avidyne IFD440/540/550 or Garmin navigators. While the AXP340 itself doesn't host maps, updating your navigation system’s map data ensures accurate position transmission to the AXP340 for ADS-B compliance.

Why GPS Map Updates Matter for the AXP340

• Ensures ADS-B Out transmits accurate and current position information
• Maintains airspace compliance with FAA NextGen standards
• Improves in-flight navigation accuracy and traffic awareness
• Reduces false alerts and improves transponder diagnostics

Steps to Update Navigation Maps for AXP340 Support

• Confirm your GPS source (e.g., IFD540, IFD440, or Garmin 430W)
• Use Jeppesen JDM or Garmin database loader to install new nav data
• Insert updated card into the GPS unit and allow system to initialize
• Verify that the GPS is transmitting valid position to the AXP340
• Check transponder configuration page via the panel interface

Firmware and Configuration Review

• Check the AXP340 firmware version through the unit’s config mode
• Ensure ADS-B parameters match aircraft configuration
• Update firmware via Avidyne Service Tool if required
• Contact Avidyne support for professional firmware installation help

After Update – Validation and Compliance

• Conduct a test flight and request an FAA PAPR report
• Verify that all ADS-B Out performance criteria are met
• Confirm squawk code, flight ID, and altitude data are correct
• Use diagnostic readouts to check for any GPS data rejection issues

While the AXP340 doesn’t have map data itself, syncing it with current GPS nav databases is essential for full functionality. Always pair the AXP340 with certified GPS sources and maintain updated map databases for safe, compliant operations.