ANSI/SCTE 109 2019

Test Procedure for Common Path Distortion (CPD)

Reliable operation of today’s two-way cable networks is critical, especially considering that upstream transmission in the return path includes telephone, high-speed data, and various telemetry and other signals. Common path distortion (CPD) is a type of impairment that can affect the quality of those upstream signals. This document describes test procedures for the characterization of CPD in lab and field environments.