I have done some testing on channel 3 with my 4 channel GPD-4303S power supply. I did nine measurements and wil post a screen of each measurment with a short decsription. Hope this info is usefull. I think the results are good, no overshoot found.
This is my unit :
GDP-4303S, CH3, Uset 3.3V, no load, switched from off to on
GDP-4303S, CH3, Uset 5.0V, no load, switched from off to on
GDP-4303S, CH3, Uset 9.0V, no load, switched from off to on
GDP-4303S, CH3, Uset 3.3V, 8.2 ohm load, CV, switched from off to on
GDP-4303S, CH3, Uset 5.0V, 8.2 ohm load, CV, switched from off to on
GDP-4303S, CH3, Uset 9.0V, 8.2 ohm load, CV, switched from off to on
GDP-4303S, CH3, Uset 3.3V, Iset 0.3A, 8.2 ohm load, CC, switched from off to on
GDP-4303S, CH3, Uset 5.0V, Iset 0.3A, 8.2 ohm load, CC, switched from off to on
GDP-4303S, CH3, Uset 9.0V, Iset 0.3A, 8.2 ohm load, CC, switched from off to on