I was looking at all of my satellite strength signals and I noticed satellite 103 has a 103 (s), 103 (ca), and 103 (cb). What are the differances? 103 (s) didnt have a very strong signal, about 50 %. Maybe its spotbeam for locals? Maybe it does not apply to my area, Benton Arkansas 72019. Anyone know? All other signals looked good 80-100%