This article >> https://quantasylum.com/blogs/news/basics-power-amps covers a lot of exactly what I am trying to do with the QA403/451. However, most of the screen shots and menus have changed considerably from the original 403 when this was put together.
I’m having some difficulty getting the levels calibrated to the point where they make sense. For one example, the 451 states an attenuation of -12dB through the load box. Ok, fine. So I put that into the DB offset and the results are not correct (verified quickly by an oscilloscope reading as compared to the RMS volts indicated, and yes corrected for the peak to rms difference If I put in an offset of -18db, it’s closer. Still playing with those numbers, but what’s the correct way to actually calculate the proper offset? I’m using the load box at 8 ohms at the moment.
Etc … the real question was, if the original author had any time or intention to re-create this excellent tutorial for the newer software. Hmm, maybe I should find a 401 with the original software lol.
Anyway, thanks for looking Barry