Another interesting command for today, DACC / DACC? this sets the channel offset DAC directly, so if you ever need that little bit more than +- 2 / 20 / 200V offset it actually extends a few volts positive and negative.
This is an uncalibrated value, so for now until I work out the corrections from the PRinTCALIbration its not going to be dead on,
on my particular scope C1:DACC?
1500 corresponds to 20V,
9800 to 0V offset
18200 to -20V,
Now the number is actually a 16 bit unsigned integer, and during testing, it does actually alter the slope of the AC waveform up to a point, but it seems symmetrical, which allows for a DC offset of about +-23V for the 1V - 200mV per div range.
or about +-2.4V for the 100mV-500uV ranges.