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ANSI/SCTE 03 2016
Test Method for Coaxial Cable Structural Return Loss
The cable impedance as a function of frequency is calculated from a vector (magnitude and phase) return loss. The average of this impedance across the desired frequency range is the “cable reference impedance.” The structural return loss is calculated from the cable impedance as a function of frequency and the cable reference impedance. This may be automated, but requires a vector network analyzer, and may be subject to errors due to the cable connection.
The Society of Cable Telecommunications Engineers [scte]