Setting up a new frame with a brand new pixhawk, FW:3.3.3
When battery is connected immediately the GPS signal deteriorates, GPS fix is lost, sat count reduces and gpshdop increases. Unplugging the battery fixes the problem.
Have tried 3DR GPS/compass module, two different ebay M8N + compass modules that re-produce the same effect.
I use 6 castle creation ESC with only one of them with BEC.
Any thoughts ?
PS Have also tried removing the GPS/compass module from the frame, positioning as far away from the frame as possible (just in case there is a wiring/power interference issue, but the problem is reproduced)
Jut checked another pixhawk and it appears that there is a board issue as well, although I have no idea why one pixhawk would be affected more than another
I think these ESC (castle creations phoenix edge) produce a mother of all EMF, they do have BEC which is probably why they they affect the GPS so much.