GPS 175 to HDX, only showing altitude

deere103

New Member
Joined
Jun 10, 2025
Messages
2
Hello all, first post as I was stuck in the waiting for approval process for a while, but I've been trying my best to figure out why my gps 175 arinc data is not giving a gps fix on the skyview. I have it wired the way the example diagram with GPS 175 is wired and I have the extra serial line going to the arinc 429 as well. I'll attach my rough drawing too. When the GPS gets a fix, hdx only shows altitude from the GPS and if I plug in a route it will show eta, but nothing else.

The local display->gps fix shows the same, only altitude but no sat info

A429 is currently set up with GPS 175 as gps1, dynon said this should be set to pos1 since it's not the GPS 2020/250 but this didn't work either.

GPS 175 arinc TX settings I've tried both gama 1 and gama 3, currently high speed, but have tried both. I can see arinc data coming in, at least for some of the labels. Anyone have any ideas or run into this before?
 

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deere103

New Member
Joined
Jun 10, 2025
Messages
2
Just FYI, I do not have an adahrs installed yet but Don at dynon said I should still get a GPS fix as they have it this way on their demo rig
 
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