Greetings from a first time poster. Actually, I did'nt even know there was such a resource as this. I set my High Def Direct TV system up 3 1/2 years ago and haven't had to think about again until now. I have two Direct TV boxes hooked up to my Mitsubishi Diamond 73" 16x9 TV, one regular box with Tivo and one with High Def. Like a great many of you I've been waiting for the rush of rewinding a High Def program. I knew it was going to happen around this time by reading the PR material on the Direct TV site. I just happen to do a Google search today and low and behold I found what appears to be a group fanatically dedicated to the world of great TV. Enough of the intro...here goes the question... I downloaded the owners manual and started reading about the set-up and I came upon this section early on...(quote) "There are three types of LNBs, single, dual, and triple. A single LNB sends one signal and has one jack, or connector, inside the arm extending from the dish. A dual LNB sends two signals and has two jacks. A triple LNB dish adds an extra LNB for the third satellite (Sat C)." I'm pretty shure my old High-Def oval dish only has 2 LNBs. I only watch high def programing off my OTA antenna because I never really cared for the Direct TV offerings and I get great signals on all the available channels. But it seams that when Direct TV added the additonal High Def channels that they swithed to a thrid satellite requiring a third LNB. The paragraph from the book says that a dual LNB has two jacks (two cable connections I'm assuming) it does not say how many "jacks" a triple LNB has. Does a triple still have two jacks or do I need a third cable when I upgrade to the triple LNB set-up? Long way of getting there, but I'd appreciate any help. Thanks!