I just got my SPD3303X-E (SW version 1.01.01.02.05 (latest!), HW version V3.0 (latest??))
Out of the box, with no load and with all voltages and currents set to 0.00, and outputs OFF, CH1 and CH2 say they are in CV mode.
If I then turn all the outputs ON, CH1 goes immediately into CC mode, while CH2 stays CV. Both still show 0V at 0A out.
If I set them both to some low voltage (not necessarily the same voltage) CH1 will stay in CC mode, 0V at 0A out, but CH2 will slowly seek the set voltage in CC mode, then switch to CV (after a few seconds it ends up at the target voltage at 0A).
I do notice that if I set CH1 V to, say, 1 V (or really anything > 0V) and set some current, it will switch to CV and rise to that set voltage. CH2 will do this with with 0.00A.
First question: Can anyone else confirm similar behavior?
Second question: is this normal? Again, this is with no load (about to try some load testing now).
(Seems CH2 will sometimes do this if CH1 is off, but not reliably. CH3 doesn't seem to affect any of this.)
I should add that under load it seems more normal, though I'm still getting used to using the different modes. The channels are in independent mode.