DTF (Distance to Fault) Measurements 39
An un-terminated cable (with NO perfect load at the end) will show faults that
appear to be beyond the end of the cable. These are NOT alias faults. These faults
appear as the signal reflects off the open at the end of the cable and travels back
down the cable toward the connection at the FieldFox. Re-reflections are
measured at the FieldFox as mirror images of the original faults. The largest fault
is the open end of the cable. To avoid confusion, set the Stop distance shortly
after that fault.
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