Anyone have any experience with the Zaon XRX Onyx PCAS? I have one that a customer wanted connected to the G3X system I just installed and while the data connection seems to work (the G3X appears to be communicating with the Zaon; the error message goes away when I power the unit up), it does nothing else. It doesn't detect anything that I have ever seen, from a plane on approach a half mile away to a jet that was right next to it, it does nothing whether I have it set up to talk to the Garmin or not. This is a passive system so it depends on receiving transponders from other aircraft, correct? I have seen alot of negative posts on other forums about this thing. I was wondering what others think about it.