Before revision: Pre-echo If the ghost is seen on the left of the main picture, then it is likely that the problem is pre-echo, which is seen in buildings with very long TV downleads where an RF leakage has allowed the TV signal to enter the tuner by a second route.
After revision: Pre-echo If the ghost is seen on the left of the main picture, then it is likely that the problem is pre-echo, which is seen in buildings with very long TV downloads where an RF leakage has allowed the TV signal to enter the tuner by a second route.