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Time Domain Reflectometers (TDR)

Time domain reflectometers, or TDRs, discover faults in electric cabling. Any change in the impedance will cause a reflection, thus revealing the location of the fault or anomaly in the cabling system. Cables without faults, given that they possess uniform impedance and are correctly terminated, will return no reflections, the incident signal simply being absorbed at the end of the cable. A graphical visualization of time and waveform amplitude is generally displayed so users can analyze the data.

TDRs primarily test transmission lines and twisted pair or coaxial cables employed in industrial electrical applications. Common fault types include screening faults, which constitute conductor and screen contact; phase faults, contact between multiple conductors; sheath faults, in which the cable screen is exposed to outside contact; and faults due to moisture or a cut cable. All the preceding cause some form of resistance which disrupts the electrical current.

ATEC offers affordable time domain reflectometer rental rates for products from leading manufacturers such as Megger, Tektronix, and MOHR.