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Non-zero background voltage for arbitrary waveform

Question asked by petermolony on Mar 21, 2014
We have a 33522B arbitrary waveform generator and need to keep each channel constantly at 1v, until a TTL trigger when we need an arbitrary shape from 0-1v. 

We've managed to hack this together using Waveform Builder, by using burst mode, building the waveform between -1v and 0v and changing the "high level" and "low level" options when uploading to the machine, but would prefer a more sensible way, preferably using Labview. Is there a way to change these "high level" and "low level" settings programmatically, or does anyone know a better way to achieve this?