Ijust hooked up my H20-600 yesterday and have an ota antenna hooked up to the back. I have no problem with getting local ota channels in HD but local sd channels don't work and do not show up in the guide . The local channels that DTV offers do show up in the guide but I don't subscibe to them. I had no probem receiving these channel on my Sony HD300 wich I had before this. Is there any way to receive these sd local channels through the H 20 box?