I spent a few hours on calibration yesterday, and turns out the calibration on DCV is easy than I thought.
equipment:
HP3458A
DATRON 4000
here is some data I got, I didn't finish the calibration yet, just trying and learning to do the best I can, base on what I have.
the result looks pretty good to me so far.
P.S.
does anybody known where to buy the connector of 4950, I don't have the input cable, and I want to build a cable by myself, but have trouble to find the connector on the market.