Products > Test Equipment

Rigol DHO800 memory depth / bandwidth upgrades and noise level!

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2N3055:

--- Quote from: ebastler on November 06, 2023, 08:44:59 pm ---Ok, so 1 mV/div is the highest "real" amplification. I think the DSO900 has an additional magnified step at the bottom end, 200 uV/div.

If we assume that the scope does its noise calculations from the acquisition buffer (as opposed to the screen data like the DS1054Z), then using the magnified settings should neither improve nor falsify the results.

--- End quote ---

All of the DHO scopes use same front end amp. They all have best 1mV/div. 200 and 500µV/div are software magnifications. 800/900 and 1000/4000...

As as side not these are the covers I use. E-bay few bucks for a few of them..

Fungus:

--- Quote from: 2N3055 on November 06, 2023, 08:52:37 pm ---As as side not these are the covers I use. E-bay few bucks for a few of them..

--- End quote ---

Here's mine:

Fungus:
The results are in...

70Mhz full bw: 61.8uV
100Mhz full bw: 64.2uV

70MHz with 20Mhz limit: 56.38uV
100MHz with 20Mhz limit: 56.83uV

Let the arguments begin!

Fungus:
This is all channels at 100MHz bandwidth. CH1 and CH2 have tinfoil, CH3 and CH4 don't.

The winner is: CH3 - no tinfoil!  :popcorn:



I put a 50 Ohm terminator on CH3 and it went down to 38.8uV average.

Martin72:
Try average for acquisition...

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