🔍 Key Concepts

• Purpose and function of an echo box in marine radar systems • Difference between signal generation vs signal amplification vs signal detection in radar • How artificial targets are used during radar testing and training

💭 Think About

• Ask yourself: Does an echo box work with real echoes from actual targets, or does it create something for the radar to see? • Which option describes a function that is specifically useful for testing and tuning radar performance, rather than for normal operational signal processing? • Think about standard radar components: which tasks are normally handled by the receiver and display, not by an external accessory like an echo box?

✅ Before You Answer

• Identify which choices describe internal receiver functions (amplifying and detecting real echoes) and which describe an external test function. • Confirm which option mentions artificial targets, and consider why that would be important when a ship is alongside or in restricted waters where you still want to practice or adjust radar. • Eliminate any answer that describes something the radar set already does continuously on its own during normal operation, without needing an extra device.