I got another Ka-band false on my 9500ci today. It happened right after I started up the car (it's on a switched circuit). It seems as though this occurs when the RADAR antenna is close to a flat surface, such as a wall or a garage door. Is it possible that the self-calibration is leaking some tiny little signal that then bounces off some nearby object and then gets picked up by the antenna? Or is there some other explanation?