Hello. I have just bought an oscylloscope, a RIGOL DS1054Z

It seems to work OK, but in I got these results (it is properly grounded) (in x10)

Without probe

With the probe but nothing connected to it

Here are the specs




I suposse that is normal because the vertical scale is just 10mV per division, but I just want to be sure. Of course, when I connect the 2 endes of the probe each other, it reduces a lot.

Thank you

Best regards

 

That is normal.
A probe is like a radio antenna. It will pick up all radio, phone, wifi signals, and especially AC 50/60 Hz.

Set the horizontal scale (SEC/DIV) to 5 or 10 ms and observe the AC line frequency. Then touch the tip of the probe with your finger.

 

Indeed this is absolutely normal and can also be seen when leaving multimeters with their inputs open - the values on its display fluctuate constantly.

Just an interesting test: there is a setting that limits the bandwidth to 20MHz. If you enable it, you can see the noise is reduced since a large part of the spectrum will be filtered.

 

Thank you!!