If this is a digital system, set the end bit to yes rather than ignore under system settings.
My scanner is about 8' from the TV and used to often hang up on a specific freq. whenever the TV was on. Don't remember the specifics. Was it the TV? The outdoor antenna cable too close to the Dish cable somewhere down-line in the basement? A lamp that we turned on when we watched TV? Or something completely different? You'll have to ask someone a lot smarter than me.
Try turning off various electronic devices, LED and CFL lights, etc. and see if it makes a difference.