Plotting Issues

QSPICE
1

Hello,

I am trying to go back and forth between AC and Step analysis so I have an .ac command and a .tran command and corresponding plots for each. I will comment out the ones I am not using. The analysis will run but the plot window does not keep track. I have to close the plot window every time I run the analysis to get it to update correctly. As of today (and updating to version sep 21 2025) I can no longer get a plot for the ac analysis, when I run the ac analysis, it tires to plot the time domain plots even though they are commented out. What is a better way to do this?

Thanks

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2

any chance you save a plot config file (.pfg) in waveform viewer? If you have a plot config, it will dominate.

Go to Qspice Help, .plot, you can setup .plot for tran or ac, and without disable them together. For example, .plot tran V(x). this command will only response to .tran.

But make sure you don’t have a plot config file and close your waveform viewer before switching simulation directive.

3

Thanks @KSKelvin, I did have a .pfg file that was messing things up. I must have hit a ctrl-s with the plot window active.

Also, the .plot tran V(x) is a great timesaver tip!