My 9500ix is, of course, very quiet and I have been running with POP enabled since we have a few 33.8 guns out here.
Well, the other day I get a POP alert in light traffic. A few seconds later, there in the other lane of traffic, is a non-light bar sheriff's SUV. (lights in the grill.)
From the moment I got the POP alert, I was looking for a cobra radar detctor or something else that might have set mine off, but the only thing I found was the LEO.