GRT Avionics

I have the echoUAT wired in via serial and the ads-b in data isn't constant. I'll see aircraft for a few seconds, then they'll disappear for a few seconds then reappear and so on. I'm fairly certain the wiring isn't the issue. Any ideas?

Is that serial link running at 115200 baud? I can't think of anything else. You can record the input to a USB flash drive with the DEMO RECORD function to see what the pattern of data coming through is.