Internal jitter in DSO4202C oscilloscope

OASJ2YSeeEhBQo1

I think you need to go higher in frequency to see this feature. Above 40MHz if I recall.

See another picture here at 70MHz for reference: https://www.eevblog.com/forum/te ... 2089738/#msg2089738

TMG

Hi Sead

What high frequency do you mean?

You can check if probe cable are straight not twisted with others or create coil turns. If you touch by hand cables also you can affect signal that you observe.
If you are able to use probe from Keysigh/HP scope with Hantek? Check if is better or not.

I've checked DSO4254C with TDS 620A and can't see significant differentials. Only when i touch cables or twist them. Test frequency 25 MHz. I don't have that big jitters as you but i don't know what was you signal frequency.

OASJ2YSeeEhBQo1

Yes, unfortunately it is normal with Hantek's scopes, specially at higher frequencies. Try to use average mode to see if you can get a cleaner waveform. Test using 16 samples and see if it is good enough. Increasing the number of samples will slowdown your oscilloscope's response drastically.

Sead

Please see my previos post. Enclosed is the screen shot of signall jitter. Does someone have similar experiences?