Well, what does the dish look like? Does it say Dish 500 or Dish 1000 or SuperDish on it? If not then it is a Dish 300. As far as the LNB if you have it connected to a receiver, just go to the checkswitch screen (menu 6 1 1) and run the check and it will tell you what you have. If not connected, tell us what it looks like and what it says on it and we'll figure it out for you.