To Whom It May Concern,

Thank you for your attention on this post.

I recently use PNA-X N5245A to measure unratioed values, like A, B, C, D. However, I found the measurement values are correct when we are using magnitude (either linear and nonlinear). But we found the corresponding real/imaginary value is not clearly defined. Would you mind to disclose the conversion formula from their magnitude/phase to real/imaginary.

And what is actually the measured signal is, the voltage or current?

Best,

Da

Thank you for your attention on this post.

I recently use PNA-X N5245A to measure unratioed values, like A, B, C, D. However, I found the measurement values are correct when we are using magnitude (either linear and nonlinear). But we found the corresponding real/imaginary value is not clearly defined. Would you mind to disclose the conversion formula from their magnitude/phase to real/imaginary.

And what is actually the measured signal is, the voltage or current?

Best,

Da

Thus, the signal is devined as Vrms/sqrt(1000*Z0).

To find the magnitude |a|^2^=re^2^+im^2^

To find the phase, set phase(a)=arctan(im/re).

But, on most VNAs, the phase of a single-channel measurment will be undetermined on a sweep by sweep basis (PNA-X does have coherent receivers, so in some modes, you can view single channel phase vs frequency, in fact).