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REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol

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marmad:

--- Quote from: Fagear on December 18, 2013, 08:56:01 pm ---Now I'm in!
I went to local distributor in Moscow in bought the DS2072A device.

--- End quote ---
Welcome! There is newer FW than the version installed on your DSO. You can download it from here.

NikWing:
alright, I'll look again :)
though I don't remember reading anything that explains the anti-aliasing itself or how I would recognize this as a "problem" looking at the curves lol
1st thing I would think of is a trigger problem (if the curve isn't steady)

marmad:

--- Quote from: NikWing on December 18, 2013, 09:01:46 pm ---alright, I'll look again :)
though I don't remember reading anything that explains the anti-aliasing itself or how I would recognize this as a "problem" looking at the curves lol

--- End quote ---
Here is a link to a previous post, which has the original patent papers for Agilent's (orignally Hewlett Packard's) technique for using stochastic (random) sampling to eliminate aliasing. This followed a long argument discussion  ;) between zibadun and myself, in which he claimed that the technique I had been describing was a gimmick and possibly not even used by Agilent. If you follow the discussion backwards from there, you can see a full explanation of why Rigol's AntiAliasing doesn't work - and what they could do to fix it - assuming they got around Agilent's patent  ;)

marmad:

--- Quote from: NikWing on December 18, 2013, 09:01:46 pm ---alright, I'll look again :)
though I don't remember reading anything that explains the anti-aliasing itself or how I would recognize this as a "problem" looking at the curves lol

--- End quote ---
Here is one more link - using images to clearly show the problems of aliases when a 100kHz sine wave is undersampled at 100-200kSa/s - and how the Agilent (but NOT the Rigol) deals with it perfectly.

NikWing:
thanks! I'll check them out :)
(though I currently/still wouldn't see it if I would have this problem in front of me lol)

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