Trig Transponder Iefis Interface

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peterfly
Posts: 6
Joined: Tue Nov 24, 2020 8:43 am

Trig Transponder Iefis Interface

Post by peterfly »

I have an Explorer Lite with TT21 transponder.

The Transponder status window is displaying E RF--
What does this mean?
rainier
Site Admin
Posts: 701
Joined: Fri Aug 28, 2020 7:03 pm

Re: Trig Transponder Iefis Interface

Post by rainier »

This is explained in this document:

http://www.mglavionics.co.za/Docs/ModeS-ADSB.pdf

In your case it means - your Trig is using the GPS from the EFIS, the GPS is fine but does not have a current fix (check your GPS antenna).
It also means that there is seemingly no SP-12 GPS module connected (the second set of status indicators reads "--").
PaulSS
Posts: 67
Joined: Thu Sep 03, 2020 12:02 pm

Re: Trig Transponder Iefis Interface

Post by PaulSS »

"......the GPS is fine but does not have a current fix," does not agree with what is written in the manual, which says: "The first “RF” is for the EFIS. It means the transponder interface is receiving GPS information from the EFIS and this GPS has a valid FIX".
rainier
Site Admin
Posts: 701
Joined: Fri Aug 28, 2020 7:03 pm

Re: Trig Transponder Iefis Interface

Post by rainier »

Sorry yes - you are correct. "NF" would be no fix.
peterfly
Posts: 6
Joined: Tue Nov 24, 2020 8:43 am

Re: Trig Transponder Iefis Interface

Post by peterfly »

Hi Rainer

Thank you so much for answering this question - awesome !
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