For kicks I requested an ADS-B report from the FAA website. It had flight duration and altitudes correct so obviously had me but there were two failures in the report. Me, not knowing much about radio jargon, had no idea whet it meant so I sent an email to Garmin’s G3Xpert tech support. In a few hours I had a response and instructions for how to set my TXP configuration to correct the problem. Great support without making me feel stupid. Two thumbs up for G3Xpert. These guys know their stuff.