Rick - the XM "antenna" for the 496 is actually the whole XM receiver. It sends serial data to the 496. That's why you have to register your "antenna" when you turn on the service.
BTW - an external GPS antenna works way better than the stubby thing... especially when your VOR reciever interferes with your GPS reciever!
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Dave Gribble VAF #232
Building RV-9A N149DG (slider, IO-320, IFR)
Restored and Flying Beech Super III N3698Q
Marion IA
Struggling with fiberglass
There is no sport equal to that which aviators enjoy while being carried through the air on great white wings." Wilbur Wright, 1905
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