What is the first test performed on RADAR equipment?

The correct answer is that testing the internal circuitry is the first test performed on RADAR equipment. This step ensures that all components are functioning appropriately before any operational tests are conducted. By verifying the integrity of the internal circuitry, operators can confirm that the RADAR system is capable of processing signals correctly.

Once the internal circuitry is confirmed to be operational, subsequent tests such as calibration, signal testing, and accuracy checks can be performed. These follow-up tests are important, but they rely on the internal circuitry being in good working condition to provide valid results. Without confirming that the internal components are functioning as intended, any calibration or accuracy assessments may yield unreliable data. Thus, starting with internal circuitry is foundational for effective radar operation.