What is the primary function of the ATR box in a RADAR system?

The primary function of the ATR (Automatic Transmitter Receiver) box in a radar system is to prevent the received signal from entering the transmitter. This critical role is essential because the radar system transmits signals and simultaneously listens for any reflected signals from objects within its detection range.

If the received signals were allowed to re-enter the transmitter directly, it could cause interference, reducing the effectiveness of the radar in detecting and accurately determining the distance and speed of objects. The ATR box incorporates a duplexer or similar components that ensure a clear distinction between the transmitted pulse and the received echo, facilitating accurate signal processing and interpretation while maintaining system performance.

While other choices may reflect various functions related to radar systems, they do not specifically describe the unique and essential role of the ATR box in preventing feedback interference within the system.