The Hauppauge WinTV HVR-1800 is a PCI-Express card which has two tuners: one for ATSC/QAM digital video, and one for NTSC analog video. According to the MythTV wiki, only the digital video tuner is currently supported.
Hauppauge’s Windows driver, which contains the proper firmware, plus a shell script to perform the extraction, can be found on Steven Toth’s site (last updated Jan 2008).
