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testing square waves rise time with Rigol scope

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saturation:
FWIW on the Rigol, on the Acquire button, you can select memory depth from normal to long, set the sampling time from real to equivalent and turn off/on Sinx/x, regardless of timebase.  The sampling rate dynamically adjusts to the options selected.  You can then see the effect on sampling time by hitting Menu button on the Horizontal controls.  By playing with these in combination, you can reduce aliasing to its lowest possibility.

To help improve the appearance of your signal, you can then adjust Acquire->Acquisition from normal, peak or average to reduce noise.

I also use Display to select dots or vectors to see what the actual data points from the sampling to insure the Rigol interpolation is realistic.  



--- Quote from: scrat on January 21, 2011, 01:05:17 am ---As an Italian I must say you're right, especially about Ferrari's superiority over other cars :D...

I intended to point that, IMHO, working out the measurements on the memory and not the displayed samples should not have added too much cost, while resulting in a far more reliable function.
Another thing that, despite its low cost, also "BMW" scopes don't have is a resolution (sampling rate) manual setting: the actual rate is fixed for each time base (and memory, if there are different options). A lower resolution than the maximum, although could help the user to fall into mistakes because of aliasing, could allow a higher triggering rate (a narrower "dead" or holdoff time for calculation) if needed.

However, that's it, I'm happy for how the Rigol works, even if I haven't had too much time to play with it.
Tektronix usually gives so many specs, that the Rigol don't mention... but price makes the Rigol a good machine.


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