Frank Pintor: Thank you for your great information. Very informative.Yes, there are new different incompatible digital TV standards now, DVB-T is used in Europe, ISDB-T is used in South America and Japan, and I'm not sure what's used in the US. The old incompatible analogue TV standards like PAL, NTSC and SECAM are basically gone now, most countries I believe have moved to digital TV.
You can get a digital TV decoder here, they're not very expensive, and it will plug into your HDMI connector on the Smart TV. You can see the locations of the TV station antennas and the channels here: https://www.argentina.gob.ar/jefatura/innovacion-publica/ssetic/conectar/tda I got one for an older TV, but the reception isn't great, I need to mount the antenna higher, and being surrounded by high buildings doesn't help.