I have tiling on all of my digital channels and horizontal flashing lines on my analog channels. I have a new Motorola 922 receiver. I also have a Ku-Band that works perfectly all of the time. My dish is 7.5 ft( I was told this by a person that installed my Ku-Band LNB and replaced my C Band with a new? Norsat C Band LNB. I have no personal knowledge that this is the size of my dish).