On my TV, when I scan for OTA channels, I have the option of saying "antenna" mode or "cable" mode. The TV will scan different frequencies based on which mode you choose. When I setup my Series 4 for antenna mode, I do not have the choice of selecting "antenna" mode or "cable" mode. It only scans for "antenna" mode. If I set the Series 4 up for "Cable" it requires a cable card. My TV gets quite a few channels without any cable card. My question is, can I somehow tell my series 4 to scan OTA channels in "cable" mode? The model I have is TCD746320.