In radar calibration, what is the purpose of the tuning fork test?

The purpose of the tuning fork test in radar calibration is to verify the accuracy of the radar device. This test involves using a tuning fork that vibrates at a specific frequency, which corresponds to a predetermined speed. When the radar device is pointed at the tuning fork, it should register the speed accurately. If the reading matches the known speed produced by the tuning fork, it confirms that the radar unit is functioning correctly and is properly calibrated.

This calibration process is essential to ensure that the radar equipment provides reliable data when measuring the speed of vehicles. It helps maintain the integrity of speed enforcement, as inaccuracies can lead to unfair penalties or challenge the validity of speed readings in court. By conducting the tuning fork test, law enforcement agencies ensure their equipment meets the required standards for accurate speed detection.