I just so happens a few days ago I was browsing through some stuff on ebay, when I saw a Philips ISA TV tuner listed for sale. They had a link to the drivers. Perhaps this is the same card you have.

A USB TV tuner or Raspberry Pi TV HAT compatible with the broadcast standard in your region (e.g., DVB-T/T2 for Europe, ATSC for North America). Antenna appropriate for your broadcast standard.

While ATSC 3.0 is starting to deliver more of what it initially promised—most notably big events in HDR—you might still need to go out of your way to get a compatible TV or external tuner box.