Products > Test Equipment

Should I buy a Rigol MSO5000?

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Fungus:

--- Quote from: dietert1 on October 24, 2022, 06:10:52 pm ---Sometimes i found snap-on ferrites on scope probes useful when using digital scopes. Or feed the probe cable through a ferrite ring core multiple times in order to reduce common mode noise into the ground clip impedance.

--- End quote ---

That won't help on the MSO5000 because most of the noise is in the ADC.

Martin72:

--- Quote from: Martin72 on October 24, 2022, 08:59:14 pm ---
--- Quote from: Fungus on October 24, 2022, 03:56:31 pm ---Looking at millivolt signals with ordinary probes probably won't work well on any oscilloscope.

--- End quote ---

So for what purposes you are using this amp you´ve linked ?
Please show pics from the amp and your scope how they are connected together and with the signal source and of course screenshots where you can see it´s behaviour concerning additional noise, phase-shifting and so on.
Thankyou!

--- End quote ---

Reminder.....

Fungus:

--- Quote from: Martin72 on October 27, 2022, 05:25:32 am ---Reminder.....

--- End quote ---

Here's a picture of what your sock puppet says is too complicated/fiddly/generally impossible to do:

All the guy did was insert the cheapest, cheap-ass $3(plus shipping) Aliexpress amplifier into his signal path and the pink trace turned into the yellow trace.



There was no fiddling or messing around, just connect it up and it works. In this case it was inserted in the path of an AWG.

I don't know what more "proof" anybody could ask for.

Anding:
I wish to offer my point of view as a newbie who has just taken delivery of an MSO5104.

It has taken me a lot of time and scrutiny of the forum posts (plus time spent on the scope itself) to honestly conclude that I have not wasted my money on a flawed instrument.

The noise in the ADC is undisputed.  You can buy a much less expensive scope that has less noise.  If you spend more money you can buy a scope with less noise and still all of the MSO features.  Martin72’s pictures make this clear.

All I want to say is that I found the relentless presentation / implication of the ADC noise as a “fatal flaw” to be unhelpful - because nobody says “the noise is likely a problem if you doing X but will be no issue if you want to do mainly Y and occasionally Z”

I appeal to the experts here to define the relevant X, Y, and Z in the sentence above and thus make the discussion informative to newbies such as myself.

For me,
X: hifi audio work? Not my interest as it happens
Y: microcontroller and FPGA embedded projects
Z: VLF antenna work, I can see the noise getting in the way unless I amplify

dietert1:
When we use a scope, we want to measure something, like signal shape, amplitude, noise..
Nothing of this will be possible with that cheap amplifier in the signal chain, using it out of bandwidth and with its low input impedance. That recommendation was misleading to say the least.

Regards, Dieter

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