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Correct - AOA is all I install nowadays, IMO you'd be crazy not having 1. :)

Bob- once you do the Dynon Compass calibration first you may find your analog one does not agree therefore IT will also need adjusting- the Dynon system is so good I’ll believe it first every time ;)

You need to change the PPR ( pulse per revolution) in the EMS setup page to either 3 or 6, eg if you have it on 3 then change to 6 or vice versa per SETUP MENU > HARDWARE CALIBRATION > EMS CALIBRATION > TACHOMETER CALIBRATION.

I understand & did not disregard that - what I was trying to get as was to determine the surface wind while he was stationary as an explanation as to the ‘trigger’ event to turn the system on to think it was in flight mode. In my case it appeared to me that the main factor was indicated speed (...

Today I had the same alert while taxiing down the runway while landing, transponder did not show in ground mode until I went below 30 knots, increase speed above 30 kts & goes into flight mode. There’s the clue - did you check your settings ? Or maybe there were strong surface winds gusts ...

RVDan, to help eliminate probable causes re airspeed why not do a 'zero airspeed calibration' ? - however that should not be necessary if there is no airspeed indicated while stationary but will eliminate one data point.

I've reached out to Steve. For other Glasair owners & Dynon support - https://wiki.dynonavionics.com/Servo_Application_Guide#Glasair_II.2FIII. I note that the list shows Known to work? = No Pitch Servo - From my install experience, & due to the Glasair elevator trim system being spring biased...

Steve, I’ll call you today. Btw - for pitch servo I’d recommend the SV42T. Jake Jansen Glasair IISFT Australia

The ‘network’ (9pin dsub) cabling is the same.

Then it appears you may have the transponder in Flight mode rather than Ground mode? I always set the system up in Auto so that the ‘alerts’ will not happen on the ground.

Download this, if you do not have it & refer to pages 7-30 to 7-31 https://www.dynonavionics.com/includes/guides/EFIS-D10A_Installation_Guide_Rev_J.pdf Come back if that does not work for you;)

While the system is powered up & with 'coverage' you will get that, I 'see' traffic with the hangar doors open.

T2003, You got it right first go. :)

settings are saved in the SV, I usually do a configure anyway just to make sure that the whole system is as it should be - just a little effort to do that :)

The OP said this - “When mounting the GPS 2020 on the top of a RV-9A fuselage” :-)

I usually do that on installations however just to a good ground will work to.

While we're talking about the INFO column - I've seen a picture of it shown in the middle of the HDX screen however I have not found anything in the settings that will allow that, it just shows on the right hand side. Can it actually be in the middle or was that just an idea that was ultimately...

"I didn't touch or even get near the EMS box, so while anything is possible, I doubt that's it, but I did reroute and rework the probe wiring firewall forward. I have checked that the spade connectors are tight and they are, but I wonder if all the reworking and rerouting might have resulted in...

and... the cable is RG174 or equivalent ;)

Yes and .....make sure you do a System Configuration so that the Dynon 'sees' the servos, then do the setup of the Autopilot via the menus. That's the basics, there is more in the Install manual. Jake J