What type of test verifies radar functioning using indicators built into the device?

The internal test is designed to verify the functioning of radar equipment using indicators that are built directly into the radar device. This type of test evaluates the radar’s components and performance internally without needing external tools or conditions. It typically checks for things like signal integrity, frequency accuracy, and other operational parameters that the device itself can measure.

Internal tests are crucial because they provide immediate feedback about the state of the radar system, ensuring that it operates correctly before being used in actual speed measurements. The built-in indicators facilitate this by offering users a clear and straightforward way to assess the equipment’s readiness.

By contrast, other forms of testing, such as the operating test or the external test, involve different methods or tools that may check performance in practical, real-world scenarios or through the use of external equipment. These do not focus on the internal diagnostics that are specific to the radar's built-in capabilities.