Last night while watching some boring NBC programming I noticed that I have the dreaded scrolling white line problem. The weird part is that I only see it on Detroit channel 4 - NBC. I receive this station on Directv as part of their local packages. I checked all the other locals and there were no white lines. I also could not find them on any other channel. Is it possible to only have this problem on 1 channel? Or is the problem originating from Directv and they are the ones that have to fix it on their end? My dish is mounted on a 5/8" fence post which is grounded. All of my grounds are tied together with 10 guage copper wire. Anyone have any thoughts? 
