EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 201)

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 – S HORT BETWEEN T IP AND R ING
A ground is when either TIP or RING is shorted to GROUND
T
R
F IGURE 12.1B – S HORT BETWEEN R ING AND G ROUND
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 – B ATTERY C ROSS