Uhm, I wanted to ask something, but this might be a stupid question. I'm a newbie, I'm still learning and I just got my first oscilloscope (Hantek DSO5102B, it's a used unit not new), so please go easy on me.
Let's suppose that I turn on the oscilloscope without any probes attached (actually the probes haven't arrived yet, still waiting for the mail).
Now, if I set the oscilloscope to 20mV per division, I can see ground nose (I assume it's ground noise) of about 5.6mV dV.
You can see that also in the "picture1" file I attached.
Now, let's suppose that I set the oscilloscope to 5V per division, and I press the Run/Stop button.
While the acquisition is stopped (Run/Stop button is red), if I turn the knob to adjust the vertical scale to a lower value (let's say 100mV), the waveform size increases and if I measure it I get a 604mV dV.
You can see that also in the "picture2" file I attached.
Is this normal behavior? Does this happens on most digital storage oscilloscopes?