Triple-Play Service Deployment

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Using advanced signal processing, the single-ended map test
takes the interpretation out of the measurement and provides a
table view of the network. The table view identifies the common
elements and shows the return loss and distance associated with
the impedance mismatch.
Figure 5.9 The distance to each fault is shown.
Chapter 5: Troubleshooting the Premises Wiring
Pinched cable
Modem
With the quick view of the network, the technician can take action
on any undesired issues, such as removing nested splitters and
terminating open cables.
Noise-causing service impairments
Ingress is unwanted, over-the-air signals or electrical noise that
seeps into the coaxial network. Coaxial cables and connectors are
designed to be shielded and prevent over-the-air signals from
interfering with the signals carried over the center conductor.
However, coaxial home wiring networks are susceptible to ingress
noise if the shielding, connectors, or terminations are substandard
or damaged. Since off-air-signals and electrical noise are commonly