Paper - Using PNM Tools to Identify Misaligned Amplifiers

Using PNM Tools to Identify Misaligned Amplifiers (2023)

By Mike O'Dell, Comcast; Westley Darby, Comcast; Jason Rupe, CableLabs; Andy Martushev, Comcast; Alex Zayvelev, Comcast

Broadband networks widely use Proactive Network Maintenance (PNM) tools to identify impairments actively. While PNM has successfully identified upstream cable and common plant impairments, this paper explores whether PNM telemetries can also identify improperly aligned amplifiers that cause low Modulation Error Ratio (MER) and other performance issues. We must also identify some technical considerations necessary to create PNM tooling that can correlate plant impairments to amplifier misalignment, Figure 1.

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