I have SD cable that I found when I moved in my house last year (free!). It's only the basics, but does include the Disc. Ch. I plan to use the 3575 as the tuner on a 24" HD LCD computer screen. But, as I live in a metro area and should get all the networks via OTA digital broadcast, I definitely want to use the antenna. I only would use the cable for the DC, UPN and WGN. Will I be able to use both the antenna and the cable (without switching the input cable and rescanning)?
Also, will the ATSC tuner recieve all the additional digital broadcasts for a given station?