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Rigol DHO800 memory depth / bandwidth upgrades and noise level!

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ebastler:
That would be a tad more than 11 bits of effective resolution, right? Assuming 9 vertical divisions (with a bit of margin at the top and bottom), it's 9*50 mv / 0.2 mV = 2250 > 2048.

Fungus:

--- Quote from: bdunham7 on November 12, 2023, 08:25:41 pm ---Can you try what I suggested and post a screenshot of your scope at 20MHz and Full BW, 1ms/div, open connectors but at 1V/div?  I'm curious what you'd get for ENOB when you get out of the lowest scales.

--- End quote ---

Second attempt, with the right vertical scale:


CH1+CH2 @20MHz, CH3+CH4 full.

ebastler:
Hmm -- pity that you deleted the screenshots taken at 50 mV/div. Those actually had a higher ENOB (yes, I know that's not quite it...) than at 1 V/div.

For the 1 V/div acquisitions, I get 9*1000 mV / 5 mV = 1800, so a bit less than 11 bits.

Fungus:

--- Quote from: ebastler on November 12, 2023, 09:18:00 pm ---Hmm -- pity that you deleted the screenshots taken at 50 mV/div. Those actually had a higher ENOB (yes, I know that's not quite it...) than at 1 V/div.

--- End quote ---

I can do them again:

bdunham7:

--- Quote from: ebastler on November 12, 2023, 09:18:00 pm ---For the 1 V/div acquisitions, I get 9*1000 mV / 5 mV = 1800, so a bit less than 11 bits.

--- End quote ---

9?  But yeah, I'm seeing 10+ ENOB, pretty good actually.

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