I bought a Gigabyte U7300 DVB-T TV card, and tried it with three programs, but I still can't watch TV.
Do you have any suggestion which program would be good for this card? OS is Win 7.
I use Imaging PVR software for my TV tuner card and find it very good if you're still looking. www.imagingpvr.co.uk
It does satellite TV and DVB-T which is also called DTT or Freeview.
I don't know where you are. Their website says it works in Europe, Australia, South Africa, Russia, India, Middle East, Indonesia and Morocco. The TV signal is different elsewhere apparently.
If it still doesn't work, consider looking at manufacturer's webpage to see it there is any specific codec, driver or software required to play TV streams from your external TV card.