SCTE 03 2003
- Test Method for Coaxial Cable Structural Return Loss (formerly IPS TP 007)
- standard by Society of Cable Telecommunication Engineers, 01/01/
- Category: SCTE
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Fixed Bridge Method: The cable impedance as a function of frequencyis calculated from a vector (magnitude and phase) return loss. Theaverage of this impedance across the desired frequency range is the.cable reference impedance.. The structural return loss is calculatedfrom the cable impedance as a function of frequency and the cablereference impedance. This may be automated, but requires a vectornetwork analyzer, and may be subject to errors due to the cableconnectionVariable Bridge Method: The return loss of a cable is measured, whilevarying the impedance of a reflection bridge, until the return loss isminimized. This method requires simple, magnitude only (scalar)measurements, but is subject to errors from the cable connection, andoperator skill.
Fixed Bridge Method: The cable impedance as a function of frequencyis calculated from a vector (magnitude and phase) return loss. Theaverage of this impedance across the desired frequency range is the.cable reference impedance.. The structural return loss is calculatedfrom the cable impedance as a function of frequency and the cablereference impedance. This may be automated, but requires a vectornetwork analyzer, and may be subject to errors due to the cableconnection
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