[TowerTalk] Measuring Common Mode Choke with Anritsu VNA

Jim Brown jim at audiosystemsgroup.com
Sun Dec 31 13:09:05 EST 2017

And remember that inductors have parasitic capacitance and resistance, 
that resistors have parasitic inductance and capacitance, all of which 
depend strongly on their construction, and that the resistance of 
materials is not constant with frequency.

The most telling measurement is of a high value resistor equal to or 
greater than the highest Z of the choke you are trying to measure. And 
try resistors of different types to find those with the least 
variability and parasitic components.

73, Jim K9YC

On 12/31/2017 9:21 AM, Gary Johnson wrote:
> Be sure to check your calculation by measuring something simple like resistors and maybe a known inductor. Measuring high-value resistors will also demonstrate the limitations of your test setup.

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