Does anyone have a source for an external antenna cable to connect a GDL 50 to a Delta Pop blade type ADSB antenna? Looks like I would need a MCX to BNC cable but I am unsure of exactly the specs on such a thing. Signal loss budget? 50 ohm cable I would assume? The GDL 50 manual is silent on connecting an external 'ADSB' antenna. It does detail external GPS antennas.