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How can I calculate the impulse response out of S-Parameters using the Data Display Window and equations?

Question asked by Janis on Jul 18, 2018

Hello everybody,
I'm still a ads beginner and I have a question about S-parameter and TDR impulse response.
I would like to reconstruct the functionality of the TDR front panel using the Data Display Window.
In my understanding I get the impulse response when applying the inverse Fourier transform to my S(1,1) data.

After That I can integrate the impulse response to obtain the step response.

The following equation I would use to obtain the Impulse response:



However, the result of this calculation is not the same as the calculations using the TDR front panel.


Does anybody know what I'm doing wrong?


Thanks in advance