Another war story and Pizza Mark, will relate to this more since he understands the systems. Having time on our hands, and radar detectors becoming so popular years ago, we decided to have some fun. Being a small community, we placed a car at the start of a 30 mph zone we were having trouble enforcing. His unit was left on. People obviously slowed down until they would get a mile down the road, and even though they still were receiving a signal, they knew they weren't being pursued and would speed up. We did this for a few weeks. People became accustomed to this and would return to speeding ignoring their detectors and the officer. I used my plain car with the use of instant on feature to start enforcing the limit by setting up a mile down the road. The detectors were useless since they were receiving a signal already. It didn't take long that no one would speed on that 3 mile section of road.