Products > Test Equipment
Rigol MSO5000 HiRes mode
Fungus:
Calling Rigol MSO5000 owners...
Could some kind-hearted MSO5000 owner post screenshots of the Hires mode in use to show what effect is has on the ADC noise?
The Hires mode has various settings (from 2x to 32x?), it would be good to have a post that can serve as a reference for when the eternal "noise" question raises its head. I'm thinking of a series of screenshots at, say, 1us/div horizontal, no input connected, starting with normal sampling mode then enable Hires mode and gradually turn it up to maximum.
Ideally there should only be one more post in this thread. :popcorn:
(or maybe a second one with more screenshots confirming the first)
voltsandjolts:
--- Quote from: Fungus on October 29, 2022, 10:50:16 am ---Ideally there should only be one more post in this thread. :popcorn:
--- End quote ---
Agreed.
balnazzar:
--- Quote from: voltsandjolts on October 29, 2022, 11:33:50 am ---
--- Quote from: Fungus on October 29, 2022, 10:50:16 am ---Ideally there should only be one more post in this thread. :popcorn:
--- End quote ---
Agreed.
--- End quote ---
:-DD
balnazzar:
Come on, there is no need to get angry. It was just funny that the user above replied that way.. ;D
I'm interested in detailed Hi-Res screenshots of the MSO5000 too. You did good in asking for them, I was thinking about doing the same.
gf:
--- Quote from: Fungus on October 29, 2022, 10:50:16 am ---The Hires mode has various settings (from 2x to 32x?)
--- End quote ---
Is 32x the limit? If no, what is the limit?
32x is supposed to reduce the voltage amplitude of white noise by factor sqrt(32) = 5.66.
A 32-tap moving average filter has a -3dB cut-off frequency of ~110MHz, if sample rate is @8GSa/s.
[ And a 20MHz filter would require 175 taps, and could reduce white noise amplitude by factor 13.2 ]
If this numbers cannot be achieved (approximately) in practice, then something weird must going on.
I hope, hires does store the samples in memory with more than 8-bit precision, does it?
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