User:Johnfcrawfordjr/Common Path Distortion

Common Path Distortion, or CPD, is one of the dominant interfering signals in a broadband cable television system's return path. It is produced by the mixing of cable system RF carriers at a point in the plant where both forward and reverse RF carriers are present-- for example, at plant devices such as taps, terminators, connectors, and seizure screws. Since there are typically many more forward path carriers than reverse path carriers on a cable system, CPD results primarily from mixing of system forward path RF carriers. As such, it consists of the harmonic and intermodulation products indicated in the definitions of the two most significant forward path distortions, Common Path Distortion (CSO) and Composite Triple Beat (CTB).