I just purchased this set yesterday. At this time, I can only hook the cable tv cable directly to the TV for basic and standard channels (I am getting a digital cable hi def box this week-to get Comcast on-demand functionality). I tried selecting Cable as the mode and did a channel search for analog (their are three options STD,HRC and IRC (don't know what the last 2 are). I tried all 3 and the TV cannot find any cable channels. However it does find 12 "air" channels. The Samsung manual is pretty poor and does not mention anything about auto program channels. BTW, their is a cablecard slot....I believe Comcast does not have this or am I wrong?. Do I need that Cablecard to get all my channels? Any information is greatly appreciated.