I have a 16 port splitter in my basement where the 4 lines from the dish come into the house. I have 4 open ports on the splitter. My house is pre-wired with 2 coax jacks in all rooms. My question is this: in my home office, I currently am using both coax jacks, one feeds the cable modem (Comcast), and the other feeds a SD D* receiver. I would like to replace the standard receiver with a SD DVR, and I'm wondering if there is a way to split the D* signal to connect both tuners on the DVR. I still have the old splitter that was being used in the basement before the upgrade to the Zinwell 16 port. The old splitter is a Channel Master 6214IFD (3x4). Would this work in the office? If not, is there anything else that would work, so I would not have to run another line from the basement to the office? Thanks.