Cable fault locator
TDR-TA3.3T
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neighbor cable etc.). TDR method allows to fix multiple irregularities both discrete and
lengthy, depending on the ratio of their length and the minimal wavelength of the spectrum
of the probe pulse.
Table 2 Waveforms of typical irregularities
Type of waveform
Description
The waveform depicts the case of the signal reflection from the point of a
high resistance (the second cursor), that means a
cable breakage
. The
condition showed in the waveform is called after typical breakage.
The reflection with a signal polarity change is equivalent to a
short circuit
in
cable, to a small resistance of irregularity. Such a condition is called after a
typical short circuit.
The given waveform shows the partial breakage option (the second cursor)
followed by the complete breakage.
The waveform describes the case of a partial breakage marked with the
second cursor, followed by the complete breakage of cable.
The given waveform shows three cable solderings. The soldering marked
with the second cursor is damaged. The irregularity reflection level depicts it
good.
