I have SV since 2011 all up dates, 2 Displays, Dynon TPX, AP, 2 ADAHRS, in a RV 7
I wired TRX 2000 as recommended on both Displays and both Ground Connection and RX Connection . Port 3 Serial in device (Air avionics TRX1500) Serial out / TIS out 330) RX counter works . >>> but no good...