What is turned off when radar systems transmit?

When radar systems transmit, the receiver is turned off. This is essential because the radar system operates on the principle of distinguishing between the signals that it sends out and those it receives back after reflecting off objects. If the receiver were active during transmission, it would be overwhelmed by the strong transmitted signal, making it impossible to detect any returning echoes from targets.

Turning off the receiver during transmission prevents signal interference, ensuring that the radar can accurately interpret any signals that return after interacting with objects in its path. This cyclical process allows the radar to gather information about the distance, speed, and direction of objects, making it a critical component of radar operation. The transmitter, data processor, and signal amplifier remain active to perform their respective roles during the transmission phase.