[TowerTalk] Measuring Common Mode Choke with Anritsu VNA
ea1ddo at hotmail.com
Sun Dec 31 18:56:57 EST 2017
This VNA is not showing Zcm on screen, but, it does show S21 LogMag and Phase at same time so you can see if LogMag value is targeting -30dB to -40dB, at Phase at low levels, then you can guess the CM will be good.
To get the final figures, I can export the data in .s2p format, then do some maths in a Excel spreadsheet to get the CM data and even trace the results in a plot.
This is the spreadsheet I am using: http://www.puertobalsillas.com/radio/Balun_Guanella_4_1/Calculadora_Impedancia_Compleja.xlsx
So, thank you everyone, specially Jim, Steve, Gary and Norm.
Happy New Year !!
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