The echo box is used for:

The echo box is primarily utilized for testing and tuning radar units by simulating artificial targets. This functionality allows operators to assess the performance of radar systems in controlled environments. By generating echoes that mimic the reflection of waves from real objects, the echo box helps in the calibration and adjustment of the radar equipment. This ensures that the radar can accurately identify and determine the distance to actual targets when deployed in real-world scenarios.

Through this process, technicians can evaluate various parameters, such as range, resolution, and overall sensitivity of the radar system, leading to improved accuracy and reliability in detecting and tracking objects.