Products > Test Equipment
My Rigol DS1054Z has noise and beam thickness dependency of the vertical offset
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Someone:

--- Quote from: Miti on April 10, 2023, 01:01:28 am ---Yeap, three at work and one at home, they all do that. maybe someone smarter than I can explain this behavior.
--- End quote ---
As above reply by noisyee its pretty clear the noise is from poorly calibrated ADCs being interleaved. Does that model have a noise specification (or even typical values from the manufacturer) ?
BorisSS:

--- Quote ---Miti
Yeap, three at work and one at home, they all do that. maybe someone smarter than I can explain this behavior.
--- End quote ---
Thanks a lot! Are you sure that you see the same on your 4 Rigols and at the same conditions as me? Do you have DS1054z? Ask you because I found a picture here in this forum, there top and bottom shelfs of the internal calibration gen are equal by thickness (see attached pict).
Anthocyanina:
mine doesn't do that. I don't have a 20MHz square wave, but the ramp is consistent on the negative and positive side, as is the open input on all divisions, at around 100mvpp, and the square wave at 1khz also looks symmetrical. after some persuasion, my generator was gracious enough to give me something close to a 20MHz square wave, and it looks symmetrical as well.
BorisSS:
Anthocyanina thank you so much for the great work! Although this is bad news for me and I will have to return device to the seller((
I would like to clarify, did you definitely set Normal Mode in the Acquire menu? I get about the same results in High Res mode.
Anthocyanina:

--- Quote from: BorisSS on April 10, 2023, 06:25:19 am ---Anthocyanina thank you so much for the great work! Although this is bad news for me and I will have to return device to the seller((
I would like to clarify, did you definitely set Normal Mode in the Acquire menu? I get about the same results in High Res mode.

--- End quote ---
hi, yes, i always keep it normal mode, everything looks symmetric in any of the modes for me. i would say it really must be a defect, or, i don't know, but this thought popped in my mind, are you using different probes on the hantek and the rigol? maybe defective probe has some wridness when the signal goes negative? no idea what it could be if it's the probe, or if a probe can fail in that manner, just a thought. if not the probe, then for sure something wrong with the scope. good luck getting a replacement if so!  :)
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