Exfo CableSHARK P3 VF/DSL Cable Qualifier Manuel d'utilisateur Page 201

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CableSHARK P3 User Guide
189
Section 12 Resistive Fault Location
12.1 Resistive Fault Location (RFL) Testing
Resistive Fault Location (RFL) testing is a powerful measurement that is able to locate shorts between tip to
ring, tip to ground or ring to ground. These faults can be called shorts, grounds or crosses.
A short is when TIP is shorted to RING
T
R
F
IGURE 12.1A SHORT BETWEEN TIP AND RING
A ground is when either TIP or RING is shorted to GROUND
T
R
F
IGURE 12.1B SHORT BETWEEN RING AND GROUND
A Cross or Battery Cross is when TIP or RING is shorted (typically by water or moisture) to a lead that
contains CO voltage. This is typically at the point where there is a faulty splice and moisture can easily enter
into the splice thus completing a current path.
T
R
T
R
X
X
X
X
F
IGURE 12.1C BATTERY CROSS
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