Hi!
I am using KiCad 8.0.3.
I am trying to do simulations with TRAN and FFT, sometimes it works and sometimes not, and I am trying to figure out why.
I setup and run a TRAN simulation, a sinusoidal signal 1kHz over 100ms length.
I select and show the signal I am interested in from the node list to the right. This works fine.
Then I setup a FFT selecting the same signal, and try to run it.
Very often I get an error dialog box saying:
“Error: You must run a TRAN simulation first; its results will be used for the fast Fourier transform.”
But I just DID run a TRAN simulation before running the FFT?
What am I doing wrong?
Regarding sims the manual refers to the ngspice manual, but in my opinion this does not a apply in this context, since I am using KiCad as a front end and I never see the directives KiCad sends to ngspice.
I am looking for a tutorial describing how to do the FFT sim in KiCad, but I have not yet found any.
.spiceinit:
set ngbehavior=ltpsa
No text directives in the schematics.