i have an hr 24 dvr and would like to hook up an antenna to it. In the past (like 15 years ago) I remember having an antenna hooked up into my receiver. Is this not an option anymore. Their doesn’t seem to be anyplace to hook my coakle from antenna to dvr. Do I have to take one of the coakle from the cable so I would not have a dual channel dvr. I hope I’m making sense. TIA.