I tried to use the 2 channels of a SDG1032X, in combined mode to do a offset, just to keep the output of the first in the high resolution range of a MM. however it seems that the combining is not done on the analog side.
https://www.siglentamerica.com/operating-tip/generating-complex-waveforms-using-siglents-combine-function-x-series-dual-channel-generators/However like using a poor mans differential probe, the AWG has also a differential between the 2 non-ground BNC connections. Using this differential, one channel will be sourcing, one will be sinking current. The question is, are they designed to also sink current?
I already have a work around thought out, like if the sinking channel, sources a 50 ohm resistor, that resistor can do the “sinking”, that will work fine with small currents.
But I’m still curious whether technically such a work around is needed. (In general, not only in the case of the small burden of the MM)
Looking at method 1 of the link one would say is is possible. It’s like having a HiZ load, and have the outputs divide the voltage between them sinking and sourcing maximal. So I think no resistor is needed