Hi all. I'm new here. Directv is coming out sometime today to install services but I forgot to ask them if it could even be done. I have an older SD tv. It only has coax jack no rca jacks. I already own a rca converter thing. (Sorry don't know the proper term) problem is the rca jack converter hooks to the tv by coax cable. So how can they connect my hd dvr and the rca jack converter to my tv??? Thanks so much!