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Rigol MSO5000 HiRes mode

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balnazzar:

--- Quote from: Fungus on October 29, 2022, 06:10:26 pm ---
--- Quote from: balnazzar on October 29, 2022, 05:51:33 pm ---
--- Quote from: Martin72 on October 29, 2022, 04:17:20 pm ---- No chooseable bits like other brands got (+0.5, +1, 1.5....+3Bit)
- No effects when using this as I did the 1mV ripple-measures in several conditions of the scope

--- End quote ---

That's bad.

--- End quote ---

How is "x2, x4, x8, x16" less useful than "+1.5 bits"?

All that matters is what you see on screen. Where's the screenshots?

--- End quote ---

Here is my opinion, but of course it's a noob-ish opinion:

1. Knowing xN is not less useful than knowing the number of additional "bits", but the problem is, AFAIK, that you cannot *select* different levels. Selecting x2 could be very useful, whereas if the HR mode operates always in x16 it can squash your signal or flatten it too much.

2. We don't even know if it's x16 or x32. Again, AFAIK.

3. It's not well documented and that's annoying by itself.

Fungus:

--- Quote from: balnazzar on October 29, 2022, 06:28:56 pm ---AFAIK, that you cannot *select* different levels.

--- End quote ---

No level selection on the MSO5000? That's not ideal...

The firmware change log claims "12-bit high resolution mode".

Me? I'm not expecting 12 bits, or even 10 bits... but there should be a visible step in noise reduction.

Even if it's only 8 or 9 bits it goes from the realm of "noisy beast" into the realm of "quiet" oscilloscopes.

Martin72:

--- Quote ---3. It's not well documented and that's annoying by itself.
--- End quote ---

"Not well" is too optimistic...
According to the data sheet and usermanual you only find two sentences with interesting informations:
12 bit max.
Bandwith up(or down..) to 1/32 of samplerate
That´s all and that is very less, should the customer do their homework and do some research...
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
When I see this today, with the knowledge of today, it annoys me not to have tested it differently. ;)
But we have enough people here with a MSO5000....

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...

--- End quote ---

Thanks!

That looks to me like only one or two bits improvement, not consistent at all with the number "16" (which should give three or four bits).

gf:

--- Quote from: Martin72 on October 29, 2022, 07:35:12 pm ---
--- Quote ---3. It's not well documented and that's annoying by itself.
--- End quote ---

"Not well" is too optimistic...
According to the data sheet and usermanual you only find two sentences with interesting informations:
12 bit max.
Bandwith up(or down..) to 1/32 of samplerate
That´s all and that is very less, should the customer do their homework and do some research...
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
When I see this today, with the knowledge of today, it annoys me not to have tested it differently. ;)
But we have enough people here with a MSO5000....

--- End quote ---

The rise/falltimes and the straight line shape of the edges in the 4th screenshot https://www.directupload.net/file/d/5378/rtdacdlo_png.htm look plausible for a 16x moving average (when compared to the 3rd screenshot). It is however hard to assess w/o vertical zoom-in, whether the noise amplitude went down by a factor of 4 as well. Rather looks like less.

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