I don't have an answer to your question, but can share something with you from personal experience. If you have a friend that has satellite TV and you stop by to visit one night, and as you are walking to their front door and happen to see the whole family sitting around, vegetated around the TV, and they don't see you, you can have some fun with them. How, you ask?
You walk over to their Dish dish, pick up the steel lid to their steel trash can, and pass it slowly back and forth between the dish and its parabola, and let the fun begin. First, you will hear stomping of feet going back and forth from their seat to the satallite reciever. Then you will hear a female voice, "I don't know why its acting up, but it is". Then you stop slowly waving the metal trash can lid back and forth for a couple few minutes, and you will hear stomping feet go back to their seat. After a few, you slowly start passing the lid back and forth between the dish and the parabola again, soon followed by feet stomping their way back to the reciever, followed by more feet stomping back to the reciever, followed by a male voice saying, "Get out of the way woman, you don't know what you're doing". Then, you will hear stomping across the floor to the door, the door will fly open, and your buddy will come out and see what you are doing and ask you what the h.ll you're doing out there. I know this from personal experience, and know to do this ONLY to friends that don't have loaded firearms in their house.