I guess a hardware circuit could be how those advanced scopes are handling the DC offset function.
Is it possible to set the ADC’s upper and lower reference voltages? I was thinking you might be able raise the lower reference voltage while still keeping the higher reference voltage above the signal level.
This excellent youtube.com video doesn’t discuss clipping, but explains the usage of oscilloscope offset function with DC offset waveforms.
[youtube]https://www.youtube.com/watch?v=-eccL4oLVM4[/youtube]