A wide range of issues can affect service quality during cable subscriber installation, making thorough RF and DOCSIS testing essential while the technician is on-site. Problems may stem from poor installation workmanship, aging or damaged network components, changes made to in-home wiring, modem provisioning errors, or upstream network issues requiring maintenance. To ensure reliable performance and prevent repeat visits, technicians must test at key points including the tap, ground block, and customer premises equipment, verifying signal quality and identifying any faults before completing the installation.

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