Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent
1994-03-30
1996-10-29
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
324539, 324620, G01R 2728
Patent
active
055700292
ABSTRACT:
A cable crosstalk measurement system provides fault diagnostic information to locates faults in addition to providing a crosstalk versus frequency function to test and troubleshoot LAN cables. In a preferred embodiment, a narrow pulse is introduced into one twisted pair of a standard LAN cable, and another twisted pair in the same cable is monitored for crosstalk signal coupling. A measurement system digitizes crosstalk signals using sequential sampling of repetitive signals to provide a waveform record that is a reconstructed equivalent time representation of a real-time crosstalk signal. A microprocessor performs a fast Fourier transform of the waveform record to provide crosstalk versus frequency information, while the waveform record is also examined for higher-than-acceptable amplitude levels to locate poor quality or faulty connectors and cables.
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patent: 4290010 (1981-09-01), Blaess et al.
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patent: 5185735 (1993-02-01), Ernst
patent: 5382910 (1995-01-01), Walsh
R. M. Brooks et al, "A Time Domain Crosstalk Test for Coaxial Cables", Proceedings of the 28th International Wire & Cable Symposium, Cherry Hill, NJ, USA (13-15 Nov. 1979), pp. 58-64.
Bottman Jeffrey S.
Drucker Eric R.
Purnell Lannes S.
Brown Glenn W.
Fluke Corporation
Noe George T.
Wieder Kenneth A.
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