I noticed I had a message today on my G3X it said “GPS receiver needs service.” The gps was still functioning properly, has anyone seen that message before ?
You should always have at least one GDU (PFD usually) connected to it's own antenna like a GA26C.
If I do a 2 screen system they both get their own antennas.
With a few limited exceptions, you will want to enable the GPS receiver on at least one of your GDU's. What external GPS source are you referring to using? Besides the GDU internal receiver, only the GPS 20A, or a Garmin transponder with a built in GPS receiver, is able to aid the ADAHRS in the G3X Touch system.