Some ATSC cards don't tune correctly in Windows 7
They fail to put the tuning request on subsequent tunes after the inital one.

h4. Steps to Reproduce
AverMedia M780 or Hauppauge 1600 / 2250 card in TVServer
Using Windows 7 32bit or 64bit

h4. Additional Information
http://forum.team-mediaportal.com/mediaportal-1-1-0-beta-1-454/no-digital-windows-7-hauppauge-2250-a-70151/index2.html#post509554

http://forum.team-mediaportal.com/television-mytv-frontend-tv-server-90/tv-server-doesnt-detect-my-avermedia-m780-digital-card-40540/index5.html