poor picture - DirecTV DVR

For poor picture, relating to DirecTV DVRs and receivers. Hi Everbody

I've just change from cable tv to Direct Tv A week ago. I have 3 tvs connected up. On each tv the reception is bad. It;s making my eyes spin after watching it for awhile. I tryed changing differant cables but, theres no change. Could the sat dish be the problem? I just cant watch it anymore its crazy. It will mes your eyes up.
Thank You