Ok I Have A Rooftop Antenna That Leads To An 8 Output Panel For Ota. I Have 2 411's Running Off Of That. I Just Activated The Second 411. All Ota Channels Are At 95/100 For Signal Strength Except For Nbc On One Of The 411's. That Channel Goes In And Out. I Get The Ota Signal Has Been Lost Warning And Then It Will Come Back In. It Does This Every 10 Seconds Or So. I Have Swapped Boxes And It Only Happens At The One Location. Any Suggestions??