It's a great tool but for this specific exercise I don't think it adds any value, and since the scope was running in RIS (ETS) mode I'm not sure the waveform that is displayed has much to do with the input signal. The picture shows noticeable variations in the waveform, which means RIS is unsuitable here.
It shows just how much the measurement device itself can influence the result....RIS + sinX interpolation + 3d persistence.....really shows just how many artifacts can be attributed to the WAY in which a device interpolates what it's being fed.....I wanted to show just how far away we can get from something "trustworthy", especially when sampling and interpolating a signal....I wish the scope had an AES/EBU input and I could lock it to an external sample clock (via word clock sync).....I would love to see how a pure digital interpolation of a synthesized signal is skewed by the scopes DSP/processing engine.....
I have a cool V.A.S.T synthesis engine here, that can build block chains of various types of modulations and sources (thanks Ray Kurzweil). Sadly I think the d/a a/d and "analog" cable run would skew the results beyond the ability to make any solid predictions about HOW the scopes own interpolation transforms the original source.....(the synth has a digital out, but the scope doesn't have the corresponding input....I don't have the proper accessory)
Producing a model of a square wave, should be a very straight forward endeavor.....but everything in between that model and the way it's interpolated to the screen of a discreet device makes the whole concept quite a bit more "complicated".....in the "analog world" we live in....square waves just don't seem to want to exist.....and nature seems to like to avoid straight lines....
The real world is quite a complex place.....the virtual world is so much more simple.....shows just how far off we are of the vastness and complexity of the natural world....sometimes I step back and think we are still "living in caves"
somehow through all the muck we still manage to send 0 and 1 through global interconnection systems....most of which use far "shoddier" cabling solutions than we are displaying here (with lots of band-aids on them)....
kind of trying to re-enforce my earlier point, that showing square waves, even between "premium" gear is a rather pointless.....as it's very difficult to attribute exactly where the non linearities are coming from....are they induced (EM), are they processing "errors" etc etc etc....I could see one spending vast resources to produce a "perfect" square wave....only to realize it has no real practical application
it really is turtles all the way down