Question 3-92O4

For long-range radar detection, a **wide pulse width** is essential because it transmits more energy with each individual pulse. This increased energy allows for a stronger echo from distant targets, improving the signal-to-noise ratio and making it more likely that the faint return signal can be detected after traveling a great distance. A **slow repetition rate** (low Pulse Repetition Frequency or PRF) is necessary to provide enough time for the transmitted pulse to travel to the furthest target and return to the receiver before the next pulse is sent out. This prevents range ambiguity, ensuring that the radar accurately associates a detected echo with the correct transmitted pulse, thus yielding an unambiguous and correct range measurement for distant objects. Using a fast repetition rate would cause echoes from very distant targets to arrive after subsequent pulses have been transmitted, leading to incorrect range readings.