Is it in pieces? That dish is murder to assemble because of the way the ribs fit tightly together. You need to make sure that the mating ribs are perfectly flush as you tighten each 1'4" assembly bolt, and sometimes, to do that, you need to poke something just a little smaller in diameter, like a #2 phillips screwdriver, through an adjacent hole pair to "lever" the ribs so that the holes for the bolt you are tightening line up. Assemble four sections, then the other four, and expect to have a hell of a difficult time forcing the last two ribs together.
As Lynskyn mentioned, the dish is deep and therefore the location of the feedhorn waveguide tube is critical. I believe that dish's F/D ratio is .28, so set the feedhorn scalar ring as close to that as it goes, probably .30. Some people buy a so-called "gold ring" and attach it to the waveguide tube and then set the F/D ratio at .36, but the theoretical performance difference between doing that and just setting it a .30 is so small I doubt it can be measured.
You can calculate the focal distance using the formula located in a sticky at the top of this thread, but you must peak its Ku performance through trial and error.
I have 4dtv/dvb like this:
