This is a real newbie question I guess, but I have a guess for the answer, but I just want to clarify first, if my guesswer is correct or not.
I got this square wave of 100Hz generated from a multi meter, and connected that output to DSO.
The DSO showed a nice square wave, and it said Vpp: 3.5V, and Freq: 100Hz
But when I measure the voltage from the source of the wave with another DMM, there is nothing read on DCV. It is 0.00 volt.
Why does the DSC says Vpp from the source is 3.5V?