I turned off POP mode on my whistler pro-58 the other day and noticed instant gains in sensitivity. It doesn't false more, the signal is just greater. Sadley, I pick up cobras driving in the opposite direction with a number 3 and 4, used to be 1 sometimes 2. I tested the range increase on a K band speedsign. It is uphill on a left turn with trees. With the POP setting on, I detected it .6mile away. With POP off, I got a large gain to .8mile. Before, it would show "9" just 50 feet before line of sight, now i get detection of "9" just under tenth mile. JUST THOUGHT I'D SHARE MY RESULTS!!!