Please feel free to discuss the blog post linked below related to characterizing opamps.
Interesting project Matt, will this be a next “QAxxx” system? Could be something for testing op amps when your busy with some audio projects.
Maybe, once the other products get updated and/or the shortage has resolved. I think the board is a bit specialized for what most need these days, especially considering how good data sheets are. But what would be helpful (for me) is the ability to specify a list of tests, and then compare two opamps side by side on the exact same tester.
The output impedance contribution really matters at these distortion levels, and the ability to understand a lower bound for a load is important, because the tradeoff is noise. So, it’s a constant balance between distortion and noise.