WinTV-HVR-1850 is a PCI Express X1 board. It contains two tuners: a digital TV tuner to receive ATSC and QAM channels plus a 125-channel cable ready TV tuner. For ATSC and QAM digital TV, all 18 ATSC formats including 1080i can be watched or recorded to disk as a MPEG-2 Program Stream. A highly integrated MPEG-1/2 hardware encoder based on the Conexant -418 is on-board for recording analog cable TV to disk. The playback of the recorded ATSC and QAM digital TV and MPEG-2 encoded analog programs are done through a software MPEG-2.