I have one more question before I bump this up the chain to see if anybody knows what it could be. Does the television signal cut out during any other activities? Is it only the editor?
I was also wondering if you tried greboide’s suggestion.
I did notice one odd thing in your description of your setup. You said that two cables come from the wall. One to your modem and one cable tv signal. However later you say the TV Box is connected to the Router. Where does that cable tv signal from the wall go to? Is that what’s cutting out or is it the TV Box signal?
Sorry for the confusion.