I recently installed a 110" RCA UHF/VHF/FM antenna connected to my Sony HD100. I'm about 25-30 miles from the stations. The best signal I can hope for is from CBS @ about 69-71. I get ABC to around 65-70. Both of these channels just barely lock. CBS pixelizes frequently and ABC is not visible or audible. What signal strength do I need to have before I can get solid audio/video!?! Is anybody with the HD100 getting a good picture with less of a signal? Thanks.