Is it possible that if my tv antenna and sat. dish are pointing in a direction where the path to their sources intersect with one another that they could cause interference? A couple of times this week some of my Chicago locals lost strength when I had them viewed through my Dish 211. When I turned off the 211 and watched the channels through the tv the channel seemed to keep it's strength better. Has anyone ever heard of this happening? The channels in question are about 60 miles away (no obstructions, just across Lake Michigan) from me and I have a decent antenna with pre-amp.