Most TV's have a channel edit feature that lets you add a channel, I do not know about yours however nor can I tell you the path or the specific name.
But it lets you add a channel,, Either manually or using an "EZ-ADD" feature
To use Easy Add... Set it to scan over the air.. Let it scan.. Then switch to DVD put a disc in the player and go to EZ-ADD it should re-scan adding chan 3 analog to the list.
To do it manually, go to manual add, and add chan 3
Chan 3 (Analog) is the same for ALL services, Ant/Cable type 1,2,3 and all, changes do not happen till farther up the band (Save for digital) I think 2,3, and 4 are the same, not sure about 5 and 6, changes happen between six and 7