Just outside of Harrisburg, PA with WHTM ABC27 affiliate, having a terrible time with OTA. The signal is constantly broken up, completely unwatchable. Tried 2 different antennas here and had a friend across town tune in. Same results. When either of my HR10-250's tuners are tuned to 27, I get skips on the other tuner. Any idea what ABC27 doing to cause their signal to bring my STB to its knees?