I am trying to add an old H20-100 to my existing SWM system (HR24 and H21 currently in use). This will just be a second tuner in the same place as the DVR so doesn't need to be networked for internet or whole-home, just tune. I called to get an access card because they asked for the old one back when I disconnected a couple years back). Access card in route, not here yet. So I ran the second cable to the splitter which had two available outputs, tested the cable by connecting to the DVR and all was well. However, on this cable when connected to the H20 shows only a couple of transponders on 101 only. At this point I called tech support (and have spent hours with them over the past several days). They said I needed a red and white filter so sent one out. I got it today, connected it up, but still it is not receiving all the satellites. Finally, I called in to a tech support person who says the H20-100 will NEVER work, it is incompatible with SWM. After all the others putting time in on this, the answer is "not compatible?" What is the truth here? I don't want to give up on this receiver because it has the over-air tuner. Thanks!