Atec JDSU-SmartClass-Home - Manual (Page 3)

Coaxial Cable testing
Coax is gaining popularity as the medium of choice for transferring communica-
tions in and around customer premises. Whether the technology is broadcast or IP
video, data over coax technologies, or whole-home digital video recorder (DVR)
services, the SmartClass Home can ensure proper connection of the inside coaxial
plant. The SmartClass Home also helps technicians detect and eliminate unwanted
coaxial elements such as hidden splitters, bad barrels, and damaged cables.
Coax map
The Coax Map feature of the SmartClass Home is a single-ended coax physical
layer test based on frequency domain reflectometry (FDR), a powerful technique
used in analyzing RF transmission lines. The Coax Map test measures signal
quality as it passes through the transmission line by identifying impairments that
cause standing waves.
Coax active identification
The SmartClass Home helps technicians quickly identify which cable goes to
which room in a house. Using the Cable ID mode, technicians can determine coax
wire endings for each room with a coax run. A common problem occurs when an
unexpected splitter exists in the middle of the coax run. However, the Active IDs
of the SmartClass Home work through splitters to display multiple IDs, which
helps to locate the wall outlet or outlets that are connected via a splitter network.
noise immunity test
The Noise Immunity Test (NIT) provides good indications of coaxial cable
shielding issues. Problems arise when the inside coax has staples, sheared jacket-
ing, an exposed stinger, or an unterminated end present. The NIT increases a
technician’s chance of catching impairments before subscribers experience ser-
vice degradation. The NIT measures the signal strength of local FM carriers and
compares it to the same measurement on the cable to determine the isolation of
the coax to off-air ingress.
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SmartClaSS Home v3
The NIT helps users locate isolation issues in coax
cable to identify which legs contain faults that could
allow ingress into the coax network
The Coax Map test lets technicians locate and trouble-
shoot problematic segments of coaxial cable
Cable ID mode with Active IDs enables technicians
to identify connections for each segment of coaxial
cable