harshness, maybe it is just semantics here but backfeeding does not require diplexers.
there will be a node switch in the panel if a hopper is installed. and if you get an inhouse employee don't expect him/her to even admit that wireless works. just buy an extra wifi adapter from him and do it yourself after.
that said, hopper is great. fantastic picture. enjoy it!
Yeah. Wireless functionality can be iffy. Rolled out on a wireless Joey which pixellates quit a bit. But they use their internet a lot. I think that was the problem. Ill tell you the Hopper was also connected to the routed by wifi also, so I imagine that was a factor too.