Tower Guy is correct. You have some very strong FM stations that most likely are causing interference to TV reception. The HLSJ can be used as an effective FM filter. It will block signals below TV channel 7, including the FM band. Use the High and common ports and insert it in the coax line from the antenna.
http://www.solidsignal.com/pview.asp?p=zhlsj
http://www.atvresearch.com/hlsjvhfba...-combiner.aspx
http://www.nsccom.com/hlsj.aspx
Here is an FM signal report based on your short coordinates as showing on your tvfool report:
http://www.fmfool.com/modeling/tmp/a...7/Radar-FM.png
Here is a report based on where I think you were standing when you took the photo:
http://www.fmfool.com/modeling/tmp/2...f/Radar-FM.png
Quote:
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Another possible concern is the local FM station. It's not very powerful but a cheap radio will pick it up all the way across the dial.
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To keep the strong signals from causing interference, you should ground the coax with a grounding block connected to the house electrical system ground.
If the antenna is outside, the coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge, but the system will not survive a direct strike.