Products > Test Equipment

Rigol MSO5000 HiRes mode

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Anding:
Sure - can you give instructions of what to adjust?

Anding:
FFT 2GSa/S


Anding:
Repeated measurements


balnazzar:
I'm not understanding why hires seems to do nothing at mitigating the scope's self noise...

Fungus:

--- Quote from: gf on October 30, 2022, 10:40:06 am ---Do you know what combination of attenuation and (re-)amplification is used at each V/div setting?

--- End quote ---

No, but it doesn't really matter for noise.

There's usually two paths, you should hear a relay click over at 200mV or 500mV/div. You need to test both of those.

In these Rigols the noise seems to be in the ADC though, so it probably makes no difference what the rest of the circuit is doing.


--- Quote from: gf on October 30, 2022, 10:40:06 am ---
--- Quote ---The mathematics behind Hires mode are very simple, it's hard to imagine why it wouldn't work.

--- End quote ---
For white noise it is clear what to expect, but if the noise power happens to be already concentrated at low frequencies, then a lowpass filter won't help too much. You can only find out if you check the spectrum.

--- End quote ---

Low frequency noise would give a thick trace when you're zoomed out (due to the decimation) but it should disappear as you go towards maximum horizontal zoom.

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