I am experiencing very bad pixelization on my new Directv DVR. I bought this unit to replace a TiVO that was having the same issue and I believed it was a bad hard drive in the Tivo. 2 other non-DVR receivers in the house work fine at all locations. Using a round dual LNB dish with a multi-switch to allow 3 receivers. Have taken the multi-switch out of the mix and still have the issue on the DVR only. Directv customer service and second level have no clue. Can anyone tell me why only my DVR's would have this issue. I have tested the new DVR on my son's house and my DVR performs flawlessly at his house. PLEASE HELP!