We plan to replace our Tivo Roamio Plus with Tivo Edge. We use cable provider and have M-card installed. We want to make sure we get the HDR resolution the Edge promises. What do we need to do with the Comcast cable provider? Do we need to get a special equipment from the cable provider (we hear about 4K cable box, other say we don't need that and all we need is to pair the M-card with the new Tivo Edge)?