This question might sound dumb, but what is a dish network receiver really doing when it says "acquiring satellite signal". I want to know because I switched one of my neghbors over from directv to dish (for HD) and whenever it rains, he complains to me about the "Acquiring satellite signal" message and how his directv receiver acquired signal instantly when conditions improved. I don't understand why dish network receivers do that. Anyhow, I want to have a decent explanation for him so any input would be greatly appreciated.