I have the Digilent's USB scope and when I couple different signals to Ch1 And CH2, the channels affect each other. I didn't observe this with another USB scope.
If both are coupled I get the following:
As you see the orange signal is affecting the blue.
But when I by change reduced the frequency of the scope from 100MHz to 50MHz this problem disappeared as follows:
I changed the setting see below(set the freq. from 100MHz to 50MHz):
Is this cross talk phenomenon? Can someone explain why could this be happening and why reducing the scope freq. removed(or lowered) it?