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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:

enter image description here

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:

enter image description here

I changed the setting see below(set the freq. from 100MHz to 50MHz):

enter image description here

Is this cross talk phenomenon? Can someone explain why could this be happening and why reducing the scope freq. removed(or lowered) it?

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    \$\begingroup\$ Does the user manual / specifications list the "crosstalk" at the various bandwidths? \$\endgroup\$
    – rdtsc
    Jul 12 at 16:27

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