System and method of determining cable characteristics
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United States of America Patent
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Jul 7, 1992
Issued Date -
N/A
app pub date -
Sep 5, 1991
filing date -
Apr 3, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of and system for automatically determining length, attenuation, impedance and existence of bridge taps on installed communication cable having access to only one end of the cable. A waveform, which includes incident and reflected pulses, is analyzed to determine the presence of significant pulses. The presence of only one positive significant pulse indicates the absence of any discontinuities and facilitates the calculation of a signal-to-noise ratio which determines whether the cable will support the operation of digital communication thereon. The presence of more than one positive significant pulse or a negative pulse indicates the presence of at least one fault on the cable which prevents the operation of digital communication on the cable.
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