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Square signal level > 20ms not looking good - Siglent SDS800X HD

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eTobey:
I have compensated my probe, but when looking at longer signals, they dont look that good. The probe is directly plugged into the BNC of the signal gen (SDG1032) with a proper adapter for it.

Is this a bad probe or what do i do wrong?


Edit:
Found some good information:
https://blog.teledynelecroy.com/2018/10/putting-probes-in-perspective.html
The following articles/post can be found on the dates list on the right.

tggzzz:

--- Quote from: eTobey on May 27, 2024, 09:58:54 pm ---I have compensated my probe, but when looking at longer signals, they dont look that good. The probe is directly plugged into the BNC with a proper adapter for it.

--- End quote ---

Define the signal: voltage, frequency, source impedance.
Define the probe: type.
Define the "proper adaptor".

Yes, I'll probably regret responding to this.
But maybe, just maybe, the OP will learn how to ask a question that can be answered.
https://entertaininghacks.wordpress.com/library-2/good-questions-pique-our-interest-and-dont-waste-our-time-2/

More likely: I am too optimistic.

Manul:
At such low frequencies, probe compensation does not really matter (it's for high frequencies). I would say that what you see is an actual signal, in other words, it really happens. Does not look like probe's or scope's frequency response issue. We don't know enough about your setup.

thm_w:
Only perform the adjustment and calibration using the front cal signal as explained in the manual.



--- Quote from: Manul on May 27, 2024, 11:27:43 pm ---At such low frequencies, probe compensation does not really matter (it's for high frequencies). I would say that what you see is an actual signal, in other words, it really happens. Does not look like probe's or scope's frequency response issue. We don't know enough about your setup.

--- End quote ---

There are LF and HF probe compensation adjustments: https://www.picotech.com/library/application-note/how-to-tune-x10-oscilloscope-probes
Most likely the probes OP is using only has LF adjustment.

But I agree, assuming the probe is properly compensated its probably the actual signal.

schmitt trigger:
If you can borrow someone else's probe, you could verify whether the signal source is faulty.

Another possibility is that the scope channel itself is faulty. Have you tried the test on a different channel?? I know this is a remote possibility, but it will take you less than a minute to perform this test.

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