LAN cable identifier for testing local area network cables

Details LAN cable identifier for testing local area network cables LAN cable identifier for testing local area network cables

1994-06-09

1995-07-25

Wieder, Kenneth A.

Electricity: measuring and testing

Conductor identification or location

324133, 324539, 379 26, G01R 3102

Patent

active

054365554

ABSTRACT:
A LAN cable identifier for testing and identifying copper-conductor LAN cables in conjunction with a LAN cable test instrument is provided. Series combinations of resistors and diodes allow for both resistance measurements and polarity determinations for selected pairs of conductors of the LAN cable. Resistance values are chosen to allow for identification of each combination in order to diagnose wiring errors and to identify the particular LAN cable identifier. In addition, capacitance measurements are accommodated with minimal contribution to measurement error by careful orientation of the resistors and diodes so that the diodes may be reverse biased by a d.c. bias voltage provided by the LAN cable test instrument. The reverse biased diode junctions contribute only a small amount of shunt capacitance to the measurement.

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