Time-domain reflectometer
Electronic instrument / From Wikipedia, the free encyclopedia
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A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected pulses.
It can be used to characterize and locate faults in metallic cables (for example, twisted pair wire or coaxial cable),[1] and to locate discontinuities in a connector, printed circuit board, or any other electrical path.