I want to display Time2Freq but keep getting an <invalid> label on the diagram. I am not too sure what parameters to use. I have tried Time2Freq(tran.v(out), time) but that does seem to work. Is there an example on how to use this function?
The resulting variable of your simulation is probably in.Vt and out.Vt. Therefore, the function should use it as parameter : time2freq(in.Vt) (mind the letter case)
Below is an example of a pulse response of a simple RC filter using the time2freq function