time domain reflectometer

from The Free On-line Dictionary of Computing (8 July 2008)

Time Domain Reflectometer

   <hardware, networking> (TDR) An electronic device for
   detecting and locating short- or open-circuits in an
   {Ethernet} cable.  TDRs can also measure how the {characteristic
   impedance} of a line varies along its length.

   (1995-12-28)