I may have a problem....at least DirecTV thinks so. I wanted to add an additional TV to my satellite service. The TV is located in a separate room. I went out and bought a basic DirecTV receiver. I only have ONE cable coming into the house. Therefor...... I am running ONE line off a 3 LNB satellite and simply splitting it to two televisions with separate receivers... DirecTV says this is not good. Can someone explain why? Someone suggested I use an A/B switch instead. What do I need to buy from Radio Shack? A simple A/B switch? I take it with this switch setup I will not be able to have both TVs running at the same time?