Method and apparatus for judging active/dead status of communica

Details Method and apparatus for judging active/dead status of communica Method and apparatus for judging active/dead status of communica

1994-06-02

1996-01-30

Regan, Maura K.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

340658, 324529, G01R 3112

Patent

active

054883040

ABSTRACT:
A scheme for judging an active/dead status of a communication cable, which is capable of making an accurate judgement quickly for each cable laid at a working site. In this scheme, data representing a frequency spectrum of signals on a communication cable measured in a state in which the communication cable is known to be active/dead is stored in advance, and the data representing the frequency spectrum of the signals on a communication cable to be judged is measured by detecting signals on the communication cable to be judged while electromagnetically coupling a probe to the communication cable to be judged. Then, the active/dead status of the communication cable to be judged is judged according to a result of comparing a prescribed threshold with a difference of the data representing the frequency spectrum stored in advance and the data representing the frequency spectrum measured by the probe.

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patent: 3102231 (1963-08-01), Wolf
patent: 3703717 (1972-11-01), Kuster
patent: 3882287 (1975-05-01), Simmonds
patent: 4156846 (1979-05-01), Harrold
patent: 4833725 (1989-05-01), Teetor
patent: 5047724 (1991-09-01), Boksiner et al.
patent: 5150111 (1992-08-01), Fujieda

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