Many radars that measure targets in more than one direction usually have a display that indicates target direction. The radar processes the ground echo, Doppler shifted by patrol car speed, as a target. Some systems have two antennas, forward and rear, and the operator selects one or both antennas for use. Some radars have a separate display for locked speed so the radar can continue to measure other targets. Some courts will not accept the radar as evidence if this function is used.
Some models track and display the fastest and strongest targets in the radar beam.
Allows operator to lock a target speed and continue to track targets. Interference Another radar, transmitter, or jammer signal detected. Most models inhibit speed measurements. May indicate radar transmitting.