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How to reduce noise on digital oscilloscope?

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sonielkraf:
Hello everyone, I have problem with my digital oscilloscope, the signal on testing like noise, how to reduce them?

KungFuJosh:
Which scope do you have? What is the max frequency you need to see?

If you need less than 20MHz, then set the 20M filter on your scope channel(s).

If your scope supports it, use averaging in your acquisition menu.

sonielkraf:
My scope is siglent sds1102dl, bandwidth 100mhz, may be I need 20mhz, how to set bandwidth?
I attachment image noise

tggzzz:

--- Quote from: sonielkraf on October 22, 2024, 12:00:51 am ---Hello everyone, I have problem with my digital oscilloscope, the signal on testing like noise, how to reduce them?

--- End quote ---

The general solution to all signal processing problems is to integrate for longer.

If you want a more specific solution, you have to be specific in terms of signal/noise voltage/bandwidth, probing technique, construction technique.

At the very least show a screenshot of the noise and a photo of how probes are connected to your circuit.

KungFuJosh:

--- Quote from: sonielkraf on October 22, 2024, 12:16:34 am ---My scope is siglent sds1102dl, bandwidth 100mhz, may be I need 20mhz, how to set bandwidth?
I attachment image noise

--- End quote ---

It says "BW Limit" in your screenshot. Try that.

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