Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2007-12-25
2007-12-25
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C324S533000, C324S543000
Reexamination Certificate
active
11463913
ABSTRACT:
A method for network diagnosis between a source end and a destination end coupled by a transmission line is provided. The method includes the following steps. First, a first test signal is transmitted from the transmitter to the receiver when the hybrid is set to a first mode. Next, a plurality of first coefficients are extracted from the first test signal received by the canceller during a first period, wherein each one of the first coefficients has an index corresponding to a received order. And then, the hybrid is switched to a second mode to generate a second test signal by sending an original signal to the receiver and the destination. Sequentially, a plurality of second coefficients are extracted from the second test signal received by the canceller during a second period, wherein each one of the second coefficients has an index corresponding to a received order. Therefore, a first index is determined when an absolute value of one of the first coefficients substantially exceeds a first threshold value. A second index and a polarity of a peak are determined according to a referenced signal that is obtained by subtracting the first coefficients from the second coefficients. At last, a location with a cabling issue is determined according to the first index and the second index.
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Chen Tien-Hui
Lai Yi-Hua
Deb Anjan
Dole Timothy J
Thomas Kayden Horstemeyer & Risley
Via Technologies Inc.
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