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Skytrax200 and AXP340 Antenna - info
Antenna requirements for the Skytrax200 (ST200), as of 2021: When adding the AXP340 and the Skytrax200: You must install a sperate antenna for the ST200. Avidyne does not recommend a Duplexer, as this would not block the output power from damaging the receiver input of the ST200.
Transponder Bi-Annual Test & Inspection 91.413 Suppression Buss
This article addresses the need to turn off all units connected to the Suppression Buss, [TAS/DME] while performing a Transponder Bi-Annual Test & Inspection, FAR 91.413 The Transponder under test will FAIL the performance specs observed on the Test Set due to its operation being suppressed by any system operating…
IFD Interfaced with AXP340 Transponder
IFD Interfaced with AXP340 Transponder RS232 Config Page
AXP340 configuration when interfacing with IFD
ADSB Out Configurations IFD - RS232 out = ADSB(Avi) AXP340 * Squat Switch Source - (If using WOW (Weight on Wheels from IFD540) Pseudo WOW; Low when ground (This will transition @ 30knts GPS ground speed) * GPS Position Source - Trig ADS-B; when connected to IFD540/440 * GPS Line Speed - 9600Bps * System Certi…
AXP340 Altitude Reporting Stuck At Field Elevation
This problem is likely the result of an altitude loop. Step 1 - Determine what kind of encoder is feeding altitude information to the AXP340. It can be either RS-232 or Gray Code. If it is Gray Code, we do not expect an altitude loop problem to be possible, and there is likely something else wrong with the airc…
AMOC for FAA AD 2019-13-03 Avidyne AXP340 Transponders and BendixKing/Honeywell International KT74 Transponders
Alternative Means of Compliance for FAA AD 2019-13-03 Avidyne AXP340 Transponders and BendixKing/Honeywell International KT74 Transponders On August 27, 2019, the FAA issued AD 2019-13-03 advising of an unsafe condition of some Avidyne AXP340 transponders and BendixKing/Honeywell International KT74 transponders if…
