[TowerTalk] Measuring Common Mode with Anritsu VNA

[Norm n3ykf]

Maximo,

Did you find the find the windows software? Most of the values you're
seeking could be derived using Master Sweep Tools.

https://www.anritsu.com/en-US/test-measurement/support/downloads/software/dwl010346

Line sweep tools is one. VMA master is aother. Both are completely
free.LST records datam MST allows far more than basic manipulation

MIne is odd. It requires a rs-232 dummy mode, then an rs cable.

On Sat, Dec 30, 2017 at 3:04 PM, Máximo EA1DDO_HK1H <ea1ddo at hotmail.com> wrote:
> Hi all,
>
>
> I have in my hands a very nice device called "VNA Master" from Anritsu, model MS2025B.
>
> The thing is I am trying to measure a Common Mode choke with this VNA, using S21 mode on the braid of a coax cable with different toroid combinations, but my knowledge is limited and I am not sure if this device is able to show the common mode on screen (I think is called "complex impedance").
>
>
> The options available for the trace are:
>
> Log Mag
>
> Phase
>
> Real
>
> Imaginary
>
> Log Mag/2
>
> Log Polar
>
> Real Impedance
>
> Imaginary Impedance
>
>
> (Plus some more; SWR, Group delay, Linear Polar, Smith Chart, etc.)
>
>
> Is any of the above types useful to show Common Mode Choke on screen?
>
>
> Then , the Marker has some more options to show additional information.
>
> Apart from above list, there are some extra options:
>
>
> Impedance (Z)
>
> Admittance (Y)
>
> Normalized Impedance (NZ)
>
> Normalized Admittance (NY)
>
> Polar Impedance (PZ)
>
>
> So, I am not sure if any of those options are good to shown the "choke impedance" on screen, without additional calculations.
>
>
> What I can do, and in fact I do, is to export the measure in .s2p Touchstone format, then apply some maths on a excel sheet to convert LogMag and Phase to complex R, complex I, and finally complex Z. All of that on Excel.
>
> But to get that directly on screen would be much better.
>
>
> Thank you very much.
>
> Happy New year.
>
>
> 73, Maximo
>
>
>
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