The effectiveness of radar devices is largely determined by what parameter?

The effectiveness of radar devices in measuring speed is influenced by multiple parameters that work together to ensure accurate and reliable performance. Signal strength is crucial because a stronger signal can provide clearer measurements and is less susceptible to interference from other sources. Range is also a significant factor; it determines how far away the radar can detect a moving object, thus affecting its ability to accurately measure speed at greater distances. Lastly, signal processing plays a vital role as it involves the algorithms and techniques used to interpret the returned signals, filtering out noise and refining the data for accurate speed estimation.

Each of these elements contributes to the overall capability of the radar system; therefore, their collective impact is why the effectiveness of radar devices is best described as being dependent on all of these factors together.