DS2460Q QAM Analysis Meter Operation Manual
92
While the cable has Short Circuit fault, the reflection
pulse is negative, as the Figure 4-74 show.
∆t
Transmit
Pulse
Reflection
Figure 4-74
The waveform is upward also indicate the high
impedance serial or the characteristic impedance of
cable has significant change. The waveform is
downward also indicate the T-joint or the cable has
the lower characteristic impedance. The short circuit
and open circuit has the great reflection, the bad
connection or other minor discontinuities has the
small reflection.
If you not find any reflection on screen, maybe no
fault location on the cable or the fault location
position beyond the current setup measuring range.
TDR function has several measuring range options:
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