hydrawerk, here is the antialiasing feature at work on Rigol https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg255344/#msg255344. It attempts to minimize moire patterns on the display. I think it works fine
Wow, you just don't want to stop being wrong about this
The meaning of Aliasing, as applied to a DSO, is when high-frequency components “fold down” into a lower frequency when the sample rate isn’t fast enough. What you call "classic" aliasing is the ONLY aliasing - there is NO other meaning in the world of Digital Storage Oscilloscopes. As I've mentioned before, if you think there is, please
post a link describing a different kind of aliasing in DSOs.
What Rigol calls Anti-Aliasing is a useless feature. There is no way I would be confused by your first image into thinking I was seeing a lower frequency than I was. Oh great, it's managed to eliminate a fluctuating pattern in a solid block of pixels - whoopee!
marmad and now Teneyes expect this feature to do something else in undersampling mode. But looks like they will get either noise with some aliasing (Agilent) or "classic" aliasing (Rigol). they don't get to see the real signal while undersampling. So guys pick your poison
The Agilent's "noise", as you call it, is actually a solid block of pixels, which is what you
should see given the frequency and sample rate - that is the
REAL signal (or a close enough approximation). That would actually help me from being confused by incorrectly folded-down lower frequencies. Sorry, but it seems as if you still don't understand the concept of what it's doing