User`s manual

There is no need to specify the DAC format with waveforms programmed in
volts. The format should be specified if you are:
a. Programming waveforms in DAC codes
(
[SOURce:]LIST[1][:SEGMent]:COMBined or
[SOURce:]LIST[1][:SEGMent]:VOLTage:DAC commands).
b. Driving the DAC directly (
[SOURce:]ARBitrary:DAC:SOURce).
c. Directly downloading waveform segments
(
[SOURce:]ARBitrary:DOWNload).
Related Commands: [SOURce:]ARBitrary:DAC:SOURce,
[SOURce:]ARBitrary:DOWNload, [SOURce:]LIST[1][:SEGMent]:COMBined,
[SOURce:]LIST[1][:SEGMent]:VOLTage:DAC
Executable when Initiated: Query form only
Coupling Group: None
*RST Condition: Unaffected
Power-On Condition: [SOURce:]ARBitrary:DAC:FORMat SIGNed
Example Setting Unsigned DAC Code Format
ARB:DAC:FORM UNS Sets unsigned format.
[SOURce:]ARBitrary
314 Command Reference Chapter 8