Why should troubleshooting for impulse noise begin at distribution taps of 17 dB or lower?

Troubleshooting for impulse noise at distribution taps of 17 dB or lower is critical because these taps have less isolation and attenuation to noise. In a network or distribution system, taps with lower dB ratings can imply that they are closer to the main signal source, resulting in higher exposure to noise from various sources. This proximity can allow impulse noise—from electrical interference, sudden voltage spikes, or other disturbances—to more easily affect the signal quality.

By starting the troubleshooting process at these points, technicians can effectively diagnose and address the sources of impulse noise, which may be impacting the overall performance of the system. Focusing on these taps allows for identifying noise issues that could be more pronounced at connections that have less inherent isolation, enabling timely interventions to restore signal integrity.