Please excuse if this is stupid, I've been searching to see if I can find an answer to this on Google, but it seems I'm facing the issue in which I don't know how to describe the issue I'm trying to solve.
I'm using a function generator to generate a square wave with 100mVpp, I'm using the oscilloscope, without a breadboard, to read the signal from the function generator.
My understanding is that an oscilloscope reads the voltage changes and displays it on a time series. However, as you see in the picture below, I have two lines for each peak.
Why are there two lines? Does it represent a range?