I recently had a JVC-KDHR1 (HD built in & XM ready) and XM tuner installed by Circuit City. Previously I had the XM Roady which I plugged into the cigarette lighter - it sounded terrible - I could be driving down NY Ave past the big satellite at "XM world HQ" and have bad static. Now as advertised my current configuration offers "CD quality" XM - but (a big but) that's when it's not cutting out. It's constantly cutting completely out and says "Loading" or "No Signal."

An interesting (and frustrating) thing I've noticed is if I keep in on one XM music channel things are mostly good (from the sense of not cutting out) but if (how dare me) I change channels, I get "loading" or "no signal" and a long period of silence (we're talking like 5 minutes not 5 seconds) before the coverage is restored. Does anybody know what's going on there? I tend to think it's not something the installer did incorrectly -- if something were connected wrong or loose there'd be no signal ever at all, I would think.

Any suggestions?