jliltd
Well Known Member
So if I want to hide my GDL39 can I install a remote ADSB antenna and get GPS into it from the Aera 660 like in this wiring diagram or does the GDL39 need it's own GPS antenna? My drawing is very crude but I think shows what I'm trying to do.
AERA 660 has an external GPS antenna connected
G5s have an external GPS antenna connected
GDL 39 doesn't have an external antenna (unless you guys tell me it's needed)
Your question being answered, your diagram may be trouble. The GDL 39 and aera 660 have to be connected with both TX and RX wires set to the same data format of "GARMIN DATA TRANSFER". So your blue wire in the diagram is also going to the G5's RX pin in parallel with the GDL 39. You can't do that since the data formats are not compatible. So the G5's want the different data format setting of "AVIATION IN/NMEA & VHF OUT" so you would have to send that to them on their own channel from the 660 with that proper format. So in your example it would be 660 blue wire to GDL 39 Green/White wire, 660 yellow wire to GDL 39 Green Wire. For that connection the area 660 Data Channel 1 (TX1 and RX1) would be set to "GARMIN DATA TRANSFER". Then you would connect the 660 Orange wire to the G5's pin 4. For that connection the aera 660 Data Channel 2 (TX2) would be set to "AVIATION IN/NMEA & VHF OUT". For extra points you could take this same "orange" circuit and route it to a VHF com that allows for remote standby tuning via the SL-40 protocol. That works because those radios use the same data protocol setting as the G5's.