Products > Test Equipment

Rigol MSO5000 HiRes mode

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Fungus:

--- Quote from: Martin72 on October 29, 2022, 07:35:12 pm ---As I´ve owned one I did some tests as the new firmware came up:
https://www.eevblog.com/forum/blog/new-rigol-scope/msg2233980/#msg2233980

--- End quote ---

A few pages further down you posted some more screenshots with similar results:

https://www.eevblog.com/forum/blog/new-rigol-scope/msg2264154/#msg2264154

Fungus:
If they claim 12 bits then that's an improvement of 4 bits over their 8-bit ADC.

Four bits improvement indicates 16x oversampling... that gives us a source for the number "16".

I'm not seeing 4 bits of improvement in those screenshots though.

Martin72:

--- Quote ---According to the data sheet and usermanual you only find two sentences with interesting informations
--- End quote ---

Searching in the data sheets/user manuals of the 7000 and 8000 for eventually more, nothing...
8000 "says" the same and in 7000 the hi-res mode is not mentioned.. ???
Checked at last the DS1000Z: Same as 5000.


--- Quote ---A few pages further down you posted some more screenshots with similar results:
--- End quote ---

Today, with the knowledge I got now about it, I would do the tests in a different way.
The test with the squarewave is good and can repeated when it´s interesting to know where the bandwithlimit lies.
Next could be a test like I did one, two weeks ago with a very small signal to see an improvement against non-hires mode.
Assuming the same method is used, I can test it with the DS1054Z at work next week.
But best would be testing with the 5000 itself.

Anding:
What are the instructions to run this test?   

Assume

New MSO50104 with latest firmware and factory options installed, 100MHz bandwidth
Supplied Rigol probes
External Hantek AWG (in the handheld oscilloscope), if needed
One BNC to BNC cable
One BNC to crocodile clips
The usual breadboard, resistors, etc. if needed

Basic familiarity with operating the MSO5000 at this point.  But just tell me the circuit, waveform and parameters.  By the way, how do we judge the noise?  A fatter trace - according to Dave that may be sensitivity?  https://youtu.be/Znwp0pK8Tzk  Better to obtain some statistics if someone can kindly can suggest how

Martin72:
Hi,

First and very simply, you can check it´s own noise with and without hi-res mode, visually.

Then you can do it like this here:

https://www.eevblog.com/forum/testgear/is-a-rigol-mso5000-overkill-for-a-hobbyist/msg4481968/#msg4481968

And trying other waveforms like other members did in the linked thread.

Or something different - goal is to understand how the hires mode of the rigol works in real.
Rigol "told" very less about it, but main thing seems that it is depending on the samplerate.
So your tries should including a force down of the samplerate by e.g. adding more channels at the same time (reduces the max. samplerate, regardless if they are used or not).


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