Hooking up Sony RDR-HX780

I am trying to set up my new DVD recorder so I can output my satellelite signal on coax to other TVs, and also playback recordings and DVDs on the coax. (goes to a splitter and 2 other TVs. Meanwhile I also have another TV located with the Sat receiver which I connect via s-video. With my old VCR I could run the Sat signal and playback through both connections. With this unit I can only get it to playback through the coax or the s-video, not both at the same time. Any ideas? Currently I have it all running in and out of my old VCR, so it sort of works.