so i was driving past one of those police speed monitors that they put on the side of the road that shows your current speed. As i approached it initially my RD read K band, then as i got closer to it it changed to Ka band (about 300-500ft away). I was wondering if this is typical or not. I am pretty sure there is normally no other bands my RD picks up when i pass by the same location when it is not there which is why i am asking the questiong. anybody have an insight into this?