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Rigol HDO1000 and HDO4000 12bit oscilloscopes launched in China
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vokars:

--- Quote --- also have an nice UDP3305S to use for this
--- End quote ---

Then it should be straight forward to use the scan method like the Bode Plot script does.
Frunse:
Found this Video very good!



Easy-SCPI  could made all easier i guess

Need to go into it.

Robert
Frunse:
Hi,
have tested the DSO1074 about the noise Values:

Siglent has only Time base Accuracy ±25ppm on Datasheet Page 9 on bottom you can read it.
https://www.batronix.com/files/Siglent/Oszilloskope/SDS1000X-HD/SDS1000X-HD_Datasheet_EN01E.pdf

Siglent writes on his Datasheet:
Noise floor*2 (rms, @50 Ω, typical,1 mV/div) 70 μV(Full Bandwith)

With 50Ohm Termination i measured 63uV @full BW and
23uV @ 20MHz BW Limit AC RMS on Rigol DHO1074(hacked) ;)

Robert
ebastler:

--- Quote from: Frunse on July 25, 2024, 08:44:16 am ---Siglent has only Time base Accuracy ±25ppm on Datasheet Page 9 on bottom you can read it.
https://www.batronix.com/files/Siglent/Oszilloskope/SDS1000X-HD/SDS1000X-HD_Datasheet_EN01E.pdf

Siglent writes on his Datasheet:
Noise floor*2 (rms, @50 Ω, typical,1 mV/div) 70 μV(Full Bandwith)

With 50Ohm Termination i measured 63uV @full BW and
23uV @ 20MHz BW Limit AC RMS on Rigol DHO1074(hacked) ;)

--- End quote ---

The time base accuracy is indeed a strength of the Rigol DHO1000 -- and you can even connect an external 10 MHz reference if the time base accuracy should really be critical for your application.

The noise floor is not exceptional though. Actual values measured on my SDS814X HD (also hacked to 200 MHz nominal bandwidth, higher in practice) are somewhat better than what you found for the Rigol. I used the same values you chose, although I would normally go to a slower time base to capture the 1/f noise better.
Frunse:
Hi,
youre scope is by sure an good Scope, Price Ratio is also great, but i never will buy and Scope with an smal Display and without HDMI Out anymore.

I would struggle with my eyes using it, like on my older DS1054Z.

Can't see on youre picture if you are using AC_RMS Measuring is this normal on Siglent???

Rigol says low noise to 18uVrms
but i am not sure how i could reach it, also don't find the settings they use for that may be anyone could give this Information?

But i am fine with it, how it is, It has all i want from an good 12Bit Scope

And if Rigol will aktivate the 50 Ohm Option any day because all Parts soldered for this already (evvblog tear down) that would be even greater (a little wisch) ;)
Not sure if they ever has a plan to do it thou.

Found this Information on the Siglent Datasheet of youre Scope, look at the attached Picture.
And made the same Measuring with my Scope with same Values for Time Base and V/Div.
But i need to use Memory 10MPoints for 2Gs/s no 2MPoints possible and if i use 1MP he switched to 1Gs/s
I have Hardware Version 2 and read there is already Hardware version 3 out, would be also interesting if anything changed on Noise Performance.

Next Question is:
Would an Mains Filter help in front of an Scope for better Noise Performance or that all comes from the Quality of that used ADC. ?
Need to check this too next

So Youre Measured Values are a lot Better than on the Datasheet, you lucky Dude ;)

Robert
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