Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1986-06-12
1988-04-19
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324 58B, G01R 3111
Patent
active
047392762
ABSTRACT:
A digital time domain reflectometer includes a pulse generator for generating a test pulse to a cable under test and comparator circuits for determining whether a reflected voltage pulse exceeds user-selected bias values thus indicating an impedance mismatch. Signal processing means which may include a computer and associated logic circuits set the bias values, trigger the pulse generator and record the time at which the reflected voltage pulse was observed. The digital time domain reflectometer may operate in a search mode in which it examines the entire cable for faults of increasingly less severity or may be used to determine the impedance signature of a cable by examining all impedance faults along its entire length.
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Tektronix Metallic Cable Testers: Accurate Time Domain Reflectometry For Field Maintenance, Long-Range and Short-Range.
Eisenzopf Reinhard J.
Mueller Robert W.
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