Cable tester

Details Cable tester Cable tester

2006-07-11

2006-07-11

Lee, Diane (Department: 2858)

Electricity: measuring and testing

Plural, automatically sequential tests

C324S543000, C324S533000, C324S534000

Reexamination Certificate

active

07075283

ABSTRACT:
A physical layer device including a first port and a second port comprises a cable tester that communicates with the first and second ports and that determines a cable status, which includes an open status, a short status, and a normal status. Opposite ends of a cable selectively communicate with the first and second ports. The cable tester includes a test module that transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer communicates with the cable and that selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator receives the signals on the second port and that estimates insertion loss.

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