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Rigol DHO804 Test and Compare Thread

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Neutrion:

--- Quote from: Martin72 on November 16, 2023, 05:22:27 pm ---Today I tested the waveform updaterate.
Based on the first table of rf-loop measurements, with a sine of 600mVpp and frequencies from 1khz up to 40Mhz.
As you know, with rigol you can't make any settings regarding vector/dots or lin / sinx/x, it only works as it is.
Memory mode is set to Auto, beforehand I made sure that the aux output is actually set to trigger out.
The trigger out signal has an amplitude of 3.3V and a single pulse width of 100ns.
The updaterates appear as bursts with pauses in between, which was to be expected.



Things worth noting:
from 5ns to 500ns the rate remains almost constant, between 1µs and 5µs it drops only slightly and between 5µs and 20µs it shows the halving at every timebase change that I know of.
But then from 50µs it drops drastically from 4 digits to 2 digits, for whatever reason.
The early minimisation of the sample rate is also interesting, it is already reduced from 100µs.
The memory points remain constant at 625 kpts from 50 µs - only at 500 µs does it rise again to 781.25 kpts and then drop again to 625 - whatever triggers this, especially as 781.25 is a rather crooked number.
I will have a look at the ultra acquiremode, how to use it and then create a table from it.
First attempt was "unsuccessful", I also had max 20000wfms/s in ultra mode.
Can't be right, so I'll look for what went wrong.

--- End quote ---

Hi Martin!
Thanks for the waveform update test, but the problem with it is, that the memory depth what you got
set is much lower then the advertised aviable memory of the scope, so these numbers do not
allow a real comparison with other scopes in the same price range, or similar mem depth.
To not to talk about allowing more than one channel which would be obvious with a four channel scope.

Martin72:
Setting was auto-memory management.
If I wanted to make a direct comparison, I would have to have the same circumstances, otherwise it makes no sense.

Randy222:
Been watching lots of write-ups and vids on DHO800 series.

Am I correct on this, getting the 804 to the 814 via "upgrades" is easy?

Neutrion:

--- Quote from: Martin72 on November 28, 2023, 07:08:27 am ---Setting was auto-memory management.
If I wanted to make a direct comparison, I would have to have the same circumstances, otherwise it makes no sense.

--- End quote ---
Yes I know, but the point was to know how does it work with the advertised memory enabled. I think with a few kpoints the 1104x-e could also get to some astronomical numbers.

Martin72:

--- Quote from: Randy222 on November 28, 2023, 05:35:21 pm ---Been watching lots of write-ups and vids on DHO800 series.

Am I correct on this, getting the 804 to the 814 via "upgrades" is easy?

--- End quote ---

Yes...Look into the hack thread.

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