I talked with the speed measurement program coordinator for my state and he had some interesting information regarding POP. POP is a trademark name used by MPH. POP as refered to by MPH is not in wide use across my state. However, POP is really the same thing as a hold button on most radar guns used in the state. The officer visually locks onto a vehicle, tracks it, and then lets go of the hold button. With that in mind, I'm wondering if I should turn the POP mode on. I realize that I will receive more falses, but is it really that bad? Any advice?