Your signals are extremely strong. The first two listed have the dBm pwr in red which indicates possibility of overload. Try an attenuator in series with the antenna coax coming to the tuner to see if that helps. If it does, leave it in and/or try an RCA ANT751 which is a small antenna for strong signal areas. Your coax should be grounded with a grounding block in such a strong signal area. It also should be grounded to comply with NEC safety requirements.
3/12/13 at 11:49am