What does the term “pulse width” refer to in Pulse Radar systems?

The term “pulse width” in Pulse Radar systems specifically refers to the duration of the transmitted signal pulse. This is an essential parameter in radar operation because it directly impacts the radar's resolution and the ability to distinguish between targets. A shorter pulse width can lead to higher resolution, enabling the radar system to differentiate between closely spaced objects. The pulse width also influences the radar's effectiveness in measuring distance, as the round-trip time for the pulse can be accurately calculated based on its duration.

In contrast, frequency refers to how often the radar signal oscillates over time and does not relate directly to the measurement of pulse width. The distance between radar readings is a function of both pulse width and other operational parameters, rather than the definition of pulse width itself. Additionally, bandwidth pertains to the range of frequencies that a signal occupies rather than the duration of a single pulse. Thus, option A correctly identifies what pulse width measures within the context of Pulse Radar systems.