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Different results between PSS and Transient Simulation when using NPORT (EMX)

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Hi, 

1) Why do I get different results in the PSS and Transient Analysis when using the NPORT of the EMX Simulation. For example, when I use the rational interpolation method for the NPORT I get different result for the PSS and Transient simulation. 

2) For the NPORT, which interpolation method do I need to use? for example when doing simulation for the VCO. What are the differences between each interpolation method?

3) Which simulation the PSS or Transient is more accurate when using NPORT?


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