I just moved and had Dish Network moved as well. I've got 3 DVRs (501, 622 & 722k) and I'd like to add a 510. There are 3 cables coming in from the dish...one goes to the 501 and the other two go to separators which feed the 4 inputs of the 622 & 722k. What do I need to connect the 510 to the same cables that the 622 & 722k are using? I've read that I can't just connect another separator. Would a DPP33 switch work? We're in the Midwest and getting 110, 119 & 129. Thanks.