“Can I hook this combo up to splitter and ab switch? My old combo had coax connectors, this combo does not. I have a hd tv, cox digital cable box, splitter and ab switch? Can I hook up this combo so I can record a channel and watch another channel? If so, how to hook up? I was thinking I need a rf modulator. Would that work? If not, what would work? How to hook up anything that would work? thank you”