đ Key Concepts
⢠MTI (Moving Target Indicator) function in marine RADAR systems
⢠Difference between mixer, filter, and detector stages in a RADAR receiver
⢠How RADAR distinguishes moving vs stationary (fixed-clutter) targets
đ Think About
⢠Ask yourself: What is the primary job of an MTI circuit in radarâdoes it combine signals, remove unwanted echoes, or simply measure interference?
⢠Think about harbor or nearâshore navigation: what problem does MTI help solve when there are many land or sea clutter echoes?
⢠Which answer choice best describes an operation that would make moving ships stand out more clearly against fixed background returns?
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Before You Answer
⢠Verify which stage of the RADAR receiver normally acts as a mixer (hint: usually at the front end to create an intermediate frequency).
⢠Check which device/function is specifically designed to reduce or cancel fixed or stationary clutter on the screen.
⢠Confirm whether MTI is supposed to highlight moving targets or nonâmoving targets before choosing.