Sometime when I'm driving I'll get a full K-band alert without any prior notice and then the threat is completely over. There is generally no cars within sight, so I highly doubt it's a real threat but it really scares the crap out of me.
Also, sometime when I start up the system about 2-5% of the time I get a full Ka-band alert. This is when my car is parked in the garage. As I pull out of the garage, the alert drops and is gone. Is the radar detecting itself? I know it can detect leaky Cobras, so is my unit leaking? Its only about 3 months old.
My Ka-band outside of my garage works very well though.