Passing by the local Police department this morning I found that they had left one of their Ka units active in a parked cruiser. This gave me a good opportunity to play around a bit. (I think that this department gets their equipment from MPH because there's a shiny new K-55 sitting in another cruiser that's parked out front.)
I wanted to see if having POP mode activated affected range. I wanted to make several runs in each configuration but someone took the cruiser out as I was about to make my fourth. So I got in two runs with POP mode on and one mode with POP off. That's a pretty lousy sample, but as far as I can tell there was no difference. It alerted at the same point between two telephone poles. I'll be headed back through that section of town this afternoon so I'll try a larger number of runs if they've left something running again.