Hi folks, hope all is well. Can someone tell me if the wave in the pic has a specific name to it? ( like a sine or a cosine or triangular for example).
I got the wave when I stuck my Oscope probe to one of the connections of my cat5e internet cable.
Thank you

p.s. The pic is upside down. sorry about that. inverting it right side up and saving it in paint is not working.

 

Look at the period of the waveform. It is 16ms. That means you're picking up 60Hz line frequency noise. What is connected to the scope probe ground clip?

 

Can someone tell me if the wave in the pic has a specific name to it?

Yes.
It's called 60Hz pickup.

 

If you were listening to it, it would be called 60 Hz/cycle "hum".

 

Yeah, 60 Hz noise is what I call it. The picture is also inverted or upside down.

Ron

 

Incidentally the actual ethernet signal is typically a 125MHz digital waveform of 2.5V differential between two of the twisted wire pairs.

 

Look at the period of the waveform. It is 16ms. That means you're picking up 60Hz line frequency noise. What is connected to the scope probe ground clip?

The scope probe ground clip was connected to the probe compensator ground.

 

The scope probe ground clip was connected to the probe compensator ground.

So you were basically looking at the AC mains induced voltage on a floating wire (with respect to your scope ground).