This video explains how to measure the characteristic impedance of a coaxial cable using a vector network analyzer and the Smith Chart.
Learn more about R&S Network Analyzers: [ Ссылка ]
Timeline:
00:00 Introduction
00:15 Suggested viewing
00:30 About coaxial cables
01:29 About the quarter wave impedance transformer
02:17 Measurement methodology
03:02 Cable and load are both 50 ohms
03:21 Cable and load are not both 50 ohms
04:01 Choosing start and stop frequencies
05:07 Calculating Z0 from Smith Chart
05:48 Summary
Understanding VNAs - Cable Impedance Measurements
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RohdeRohde & SchwarzR&Sintroductionexplanationoverviewtutoriallessonunderstandingfundamentalsbasics testtestingmeasurementmeasuringtest and measurementsT&MRFradio frequencyVNAvector network analyzernetwork analyzercablecable impedanceimpedanceSmith Chartcoaxial cablecoaxinner conductorshielddielectricZ0diameterdielectric constant5075ohmquarter waveimpedance transformerwavelengthZLZinterminationterminated50 ohmscalibration