Pulse repetition frequency is described as the number of pulses emitted per second.

Pulse repetition frequency is described as the number of pulses emitted per second.

• A. The duration of a single pulse
• B. The number of pulses emitted per second
• C. The distance between successive pulses
• D. The total number of pulses in a frame

Answer: (B)

Pulse repetition frequency measures how often pulses are emitted in time, i.e., the number of pulses per second. It is a rate, usually expressed in hertz. This differs from the duration of a single pulse, which is the pulse width or pulse duration. It also differs from the time between pulses, known as the interpulse interval or pulse repetition period, since PRF is the reciprocal of that interval. And it is not the total number of pulses in a frame, which depends on how long the observation lasts. Since the description directly defines PRF as pulses emitted per second, it is the best choice.

Pulse repetition frequency measures how often pulses are emitted in time, i.e., the number of pulses per second. It is a rate, usually expressed in hertz. This differs from the duration of a single pulse, which is the pulse width or pulse duration. It also differs from the time between pulses, known as the interpulse interval or pulse repetition period, since PRF is the reciprocal of that interval. And it is not the total number of pulses in a frame, which depends on how long the observation lasts. Since the description directly defines PRF as pulses emitted per second, it is the best choice.