In reply to Frankie boy:
To get best results, you will have to connect the USB dongle to an actual TV Ariel such as those on rooftops. The teeny tiny ones will just give you lovely images of snow.
I've used both USB and internal cards for a computer and both work just as well, however the USB one eventually broke. Now I have a TV card with two receivers, so that I can record two things at the same time, in my computer.