🔍 Key Concepts

• Pulse Repetition Rate (PRR) in marine radar and what it physically counts • The role of the magnetron, klystron, and local oscillator in a radar set • Difference between a pulsed transmitter and a continuous-wave oscillator

💭 Think About

• Which component in a typical marine radar actually produces the outgoing high‑power RF pulses toward the antenna? • Is the local oscillator usually pulsed or is it more often a continuous signal used for mixing and detection? • In standard radar terminology, when we talk about PRR in pulses per second, are we referring to low‑level reference signals or the main transmitted bursts of energy?

✅ Before You Answer

• Identify which device is the main pulsed transmitter that sends energy to the antenna. • Confirm which devices (local oscillator, klystron, magnetron) are commonly used as continuous oscillators or amplifiers rather than main pulsed transmitters in marine radar. • Make sure your choice matches the idea that PRR is measured in pulses per second of the transmitted radar signal, not an internal reference signal.