DP-1002 - 2 Way Splitter: 

 
5 - 2400MHz, used for 1 single DishPro LNBF (D-300S) and 2 DishPro receivers 
(Dish301, DishPVR 501, DishPVR 508, and DishPVR 721).

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DP-1003 - 3 Way Splitter:

5 - 2400MHz, used for 1 single DishPro LNBF (D-300S) and 3 DishPro receivers 
(Dish301, DishPVR 501, DishPVR 508, and DishPVR 721).