I no longer can view any tv channels. My tv is Samsung DNIe and model LA32r71BAX.
I stay in an apartment. Apartments usually have a wall aerial socket.

1. Is my TV digital tv?
2. If yes, do I need the apartment management to install a master aerial or something?
Or, do I need an outdoor aerial? Or, can an indoor aerial suffice?
3. If no, I suppose I need to buy a decoder. With a decoder, do I still need an outdoor or indoor aerial?

Your kind advise please. Thanks.