Recall we deviated from the sequence described in the Cal instructions figuring we were smarter than the instructions, which proved we were NOT

Then we tried to patch things up, and flipped back and forth between versions and firmware releases, then multiple failed attempts to "correct" the calibration issues we had introduced. So basically just making things worse and eventually throwing in the towel and requesting help from Siglent

Also, you'll need a really good electronic load and quality DMM (6 1/2) to do a proper calibration, they already come well calibrated from the OEM, without the mentioned quality instruments we would not recommend a user calibration. Our needs differ from a typical use case, we need and demand very high levels of precision from most of our instruments, and these power supplies (all 3) were utilized extensively in the development of a highly complex 128 independent channel (256 limit) +-100V output AWG with ~16 bit precision.....and they performed admirably!!!
Anyway, follow the instructions explicitly and you won't have any issues, as mentioned we have 3 of these and have calibrated all a few times now (they have settled in and don't need any more calibrations). Remember that you must make absolutely sure the calibration values entered are accepted and stored, leaving off a letter or forgetting to issue the store command can lead to problems.
Edit: These SPD3303X are far from perfect tho, the UI is a little quirky and takes some time to get a feel for, and the placement of the output terminals is inexcusable, they are not on standard spacing and prevent using standard dual banana plugs
If you can put up with these flaws then these are likely one the best $ value power supplies available for personal use, especially considering the output quality. However, we would not consider them for a major company lab as the terminal issue would require 2 single banana types for each channel use, and we always used quality Pomona Dual banana types.
Also, as others have mentioned the SDG 2042X AWG has proven for us to be an exceptional AWG and value. Again output quality is paramount for our needs, and this AWG has proven to provide excellent AWG waveform fidelity. UI is a little quirky but the superb output waveform quality can't be overlooked

Best,