Old thread, but...Originally Posted by Freddy
They're not a for sure thing, of course there's ways for the cops to attempt to get around them.
The cop turning it on and off while driving is very doubtful, they do sometimes do that when they are stationary though.
My escort 9500ix can pick up radar from well over a mile away though, so it would trigger when he was shooting at the cars well in front of me.
When you have a radar detector, you learn to work WITH it, not try to have it solely work for you. You start to learn its capabilities, and what different things mean. If my detector continuously goes off for 5 minutes I know theres a cop driving in the same direction as me, either behind or in front.
If it pulses on and off, likely a cop is doing something like what you described.
