What is the primary indicator of a well-functioning RADAR unit?

The primary indicator of a well-functioning RADAR unit is consistency in readings when tested. A RADAR unit should produce stable and reliable measurements across various conditions and environments. If consistent readings are achieved during testing, it suggests that the unit is properly calibrated, functioning correctly, and capable of providing accurate information to the operator.

This consistency helps ensure that the measurements taken—such as vehicle speed—are reflective of the actual situation rather than fluctuating due to malfunctions or environmental interference. Consistent performance is essential for the validity of the RADAR data and is the cornerstone for effective enforcement and safety measures.

While other options, such as a clear display of signal strength or the ability to detect multiple vehicles simultaneously, are important characteristics of RADAR units, they do not directly indicate the overall functioning and reliability as greatly as consistent readings do. Similarly, a presence of a maintenance log is valuable for tracking the unit's upkeep but does not serve as an immediate measure of performance in operational conditions.