SCTE 66 2003
- Test Method For Coaxial Cable Impedance, (formerly IPS TP 006)
- standard by Society of Cable Telecommunication Engineers, 01/01/
- Category: SCTE
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Variable bridge method: The return loss of a cable is measured, while varying theimpedance of a reflection bridge. The value of impedance, which gives theminimum reflection, is the average cable impedance. This method requiressimple, scalar (magnitude only) measurements. It is subject to errors from thecable connection and operator skill.
Fixed bridge method: The cable impedance as a function of frequency iscalculated from a vector (magnitude and phase) return loss. The average of thisimpedance across the desired frequency range is the cable impedance. This maybe automated, but requires a vector network analyzer, and may be subject to errorsdue to the cable connection.
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