Method and apparatus for detecting cable length

Details Method and apparatus for detecting cable length Method and apparatus for detecting cable length

1990-12-04

1992-10-27

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

324644, 324647, 324 83R, 324 84, G01N 2200, G01R 2700

Patent

active

051592754

ABSTRACT:
Method and apparatus for detecting a length of a cable connecting information equipments are disclosed. A reference signal which is a repetitively occurring signal is transmitted through a cable. A phase difference between the reference signal transmitted through the cable and the reference signal directly transmitted without routing the cable is detected, and a signal representing the cable length is produced based on the detected phase difference.

REFERENCES:
patent: 3388327 (1968-06-01), Sutton
patent: 4118665 (1978-10-01), Reihardt
patent: 4146835 (1979-03-01), Chnapko
patent: 4151490 (1979-04-01), Bazin
patent: 4300092 (1981-11-01), Strenglein
patent: 4703251 (1987-10-01), Baumgartner
patent: 4814689 (1989-03-01), Obara

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