What term defines the property of a test system that allows separation of signals from closely located discontinuities?

The term that defines the property of a test system which allows for the separation of signals from closely located discontinuities is known as discontinuity resolution. This concept is crucial in nondestructive testing, specifically in Eddy Current Testing, as it refers to the system's ability to detect and differentiate between signals originating from defects or discontinuities that are in close proximity to one another.

Discontinuity resolution is essential because in real-world applications, materials often contain multiple flaws in proximity, and being able to resolve these signals accurately is necessary for effective evaluation and analysis. This capability ensures that a technician can obtain clear and reliable data regarding the condition of the material being tested, leading to better decision-making in maintenance and safety.

Other terms, while relevant in their own contexts, do not specifically address the separation of signals from close discontinuities. Dynamic range pertains to the range of signal amplitudes the system can measure, sensitivity measures the system's ability to detect small signals, and linearity refers to how accurately the output of the system corresponds to the input over a range of conditions.