I have a Hauppauge HVR-1600 74551 TV Tuner Card. After installing it in my Windows 7 PC, I ran the Windows Media Center setup and it only detected my analog signal.
After doing some investigation I discovered that it may or may not support Clear QAM. Hauppauge Support said it does not, however several dozen folks on the internet say they have gotten theirs working with analog and Clear QAM by modifying a registry setting.
I've tried everything recommended but have had no luck in picking up my Clear QAM channels. I'm about ready to just go buy a new capture card if I can't get it working, but I figured I'd ask in here and see if anybody could help.
Summarizing: Hauppauge HVR-1600 74551 officially DOES NOT support Clear QAM, but internet people claim to have gotten it working. I, however, have not after trying everything and could use some assistance.