From the specs listed I would think that ATSC is not supported since it only lists the DVB standards.
Specification
Sony CXD2880 TV tuner
Supported TV standards: DVB-T2, DVB-T
Reception frequency: VHF III, UHF IV, UHF V
Channel bandwidth:
DVB-T2: 1.7MHz, 5MHz, 6MHz, 7MHz, 8MHz
DVB-T: 5MHz, 6MHz, 7MHz, 8MH
Digital Video Broadcast (DVB) is a widely adopted standard for transmitting broadcast Television, countries that have adopted the DVB standard can be found here;
https://www.dvb.org/resources/public/images/site/dvb-t2_map.pdf