My Samsung 160 loses retention of ota digital signals every 10 seconds or so. The digital picture looks great when it's on. I just had Directv installed with an ota antenna. The ota digital signal strength fluctuates from the 80's % to 100%, but goes right to 0 % every 10 seconds or so. The installer said it was a problem with the Samsung 160 receiver. I could see this being true, but also think it may be a problem with the antenna. Does anybody have a guess whether it is the receiver or the antenna?