PreEqualization Analyzer is a Proactive Network Maintenance (PNM) tool that allows cable operators to find and fix upstream impairments in their cable plant before they impact subscribers. The application collects pre-equalization data from the cable modems to pinpoint the location of impairments to within 50-feet or less. You can see which modems are being affected by issues in the home, at the drop, or further out in the plant. Correlation groups show which modems are being impacted by a common impairment and the approximate distance. With PreEqualization Analyzer operators can proactively correct the causes of impairments like microreflections and group delay as part of their routine maintenance, before their subscribers’ are affected.