How do I hook up a SD TV to TiVo, and a router

[Sarina42]

I have Atlantic Broadband. I switched a HD TV back to a SD TV, and I can't seem to figure out how to hook up all cables. Someone said I needed a coaxial HDMI converter. Is that true?

 

[jsmithepa]

Do you have a set-top box on top of this SDTV? You may have to order a proper one from the carrier.