Good evening
It appares that FFT is not working correctly for me.
After running succesull .tran simulation, a FFT can be lanched from waveform viewer. This brings up window to select which node voltage or branch current to select. After selecting needed quantity and pressing OK (keeping rest of the settings defalut) an empty (vertical scale in dB, horizontal in logarythmic Hz) launches, waveform viewer freezes and crashes after a few seconds (if one tries to interact with it).
But the is a catch - this fault seems to be kind of … intermittent ?
After launching the simulation N times it may start to work on N+1 attemp. And once it does, simulation can be relaunched (at least with the same settings) and it will continue to work.
Attaching an example circuit that causes that problem (just a squre wave voltage source and resistor). Notice the “_2” in name - this is because first example started working corectly after a few simulation attempts.
Broken_FFT_2.qsch (1.8 KB)
Regards
