All Multi System TVs do not have a American(NTSC) digital TV tuner. They come with Analog TV tuner
What does this mean?
To watch digital channels (ATSC Broadcasting in US and DVBT broadcasting overseas) you need a digital source/tuner like a cable box, digital tuner, satellite service, etc. To get the best quality video on this TV you need a source that has a digital connection like HDMI or component.