I have the same PVR through Cox Cable, and they say because copyright stuff isn't completely ironed out, the HDMI, DVI, Firewire and Optical outputs on the boxes are NOT enabled, so your choice may be limited to standard RCA cabling, S-Video or Component cables (which you would have to use for High-Def). Check with the cable company. In the meantime, I have a High-Def VCR that I can't use to record movies in HD...