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Time-domain reflectometer
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{{Short description|Electronic instrument}} [[File:Megger Time-Domain Reflectometer MTDR1.jpg|thumb|Time-domain reflectometer for [[Electrical cable|cable]] fault detection]] A '''time-domain reflectometer''' ('''TDR''') is an electronic instrument used to determine the characteristics of [[Transmission line|electrical lines]] by observing [[Signal reflection|reflected]] [[Pulse (signal processing)|pulses]]. It can be used to characterize and locate faults in metallic cables (for example, [[twisted pair]] wire or [[coaxial cable]]),<ref>{{FS1037C}}</ref> and to locate discontinuities in a connector, [[printed circuit board]], or any other electrical path.
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