problem with spectre ADE calculator

[viperpaki007]

Hi,

I am trying to take FFT of a time domain signal, at differential LNA output, from 100nsec to 200nsec using spectre ADE calculator. However, when i try to evaluate the fft, following error appears. Can anybody suggest what can be the reason for it.

Warning -
<Calculator>
Evaluation error(ERROR : ("putprop" 1 t nil ("*Error* putprop: first arg must be either symbol, list, defstruct or user type" nil))). Expression: dft(VT("/out") 100n 200n 1000 "Rectangular" 1 dftCoherentGain("Rectangular",1) )

 

[dick_freebird]

Is the VT("/out") node (the first argument) giving you
a trace when you try to plot it?

 

[viperpaki007]

Yes ..it is giving me a trace

 

[dick_freebird]

Then I would say that the error message is inaccurate,
your first argument is valid. Maybe try and build the
dft() expression again, bottom-up?