I've been around dishes for some time and my own setup is now acting up and it has me stumped. I have an oval dish with the standard quad LNB. Three lines running into my house, one goes to a 505 and the other two go to a 630. Last week I noticed that on some channels my 630 would lose signal on one of it's tuners. This resulted in the usual problems with the 630. I soon discovered that it was specific channels that were not coming in and by doing some research I found that I had very low signal strength on any vertical transponder from F1. Same was true for my 505 so I knew it wasn't a 630 problem. Since I was getting a good signal from the F1 H I as well as the other satellite I suspected the LNB, so I changed it out with a spare I had. No improvement. Next, up the ladder on Christmas morning with my signal meter. I tuned all three lines to channel 302 CTV HD which is on an F1 V transponder, moved the dish very slightly to the west and a second minor elevation adjust and got a good stong signal from F1. I then checked the other 3 possiblities and found good signals with each. I now have signal levels in the high 70's and db levels of 6.5 to 8 on any channel I select from either satellite. My problem is that since I peaked the dish I am now giving pixalation on all channels with either receiver, any satellite/channel. Before I adjusted I was not getting pixalation, just loss of signal from any F1 V channel. Right now on on Speed HD channel 318 the pixalation is nearly constant. On the status screen line C I have 93,(Echb/No:7.3dB). Now I'm assuming that the a high dB number is better then a lower one? If that is the case I am stumped. Perhaps its time for a service call however any suggestions would be appreciated. Thanks.