hey gang got tired of cable and price jacking... I have a new 501 on my big screen back fed to a tv in the bed room..... my question is and please for give me I tried to search for it but the search function on this site kept erroring out, so here goes I have a third room with a tv hooked up a guest room, I know if i change channels all tv will change being back fed but is there a filter that will just allow locals only on the 3rd tv with out buying a second receiver???? I live alone and changing channels on all tv when I do not have a guest is not a problem but I would like them to get locals if I could install a switch or something...any advice again if this is a noob question I have been on cable for 12 years thanks for the help..