MIL had a Tivo HD and basic cable from Time Warner in Buffalo. I got her a lifetime Roamio basic (the 4-tuner model). I got a cablecard from TWC and it appears to be tuning all of the channels in the tier she subscribes (no pay TV). I got tuning adapter from them but it was DOA. I set it all up anyway (without the Cisco TA) and all of her channels appear to be watchable. Is this correct? What voodoo would the tuning adapter be providing that would require it being present? If it's not needed for the non-premium channels then I'm not going to bother going through the trouble of getting another one (and just return the DOA unit).