...
Exporting waveform (to a file) from internal memory doesn't work and I have no idea why. According to DHO800-Series_programmingguide_EN.pdf it should work. Command :WAV:DATA? return is: "The instruction is not supported!". Please let me know, if somebody knows how to do it.
...
I've seen ":WAV:DATA?" work but only for the analog channels. It doesn't work properly for LA channels (D0, D1, etc) due to bugs causing an earlier ":WAVeform:SOURce D0" to fail.
Attached is a Python file from Rigol that I
think I haven't changed too much. This
should still be in its original working form, but not guaranteed.