I've worked with television equipment for over 20 years, this is absolutely abnormal. A standard video signal should not (cannot) effect the operation of your equipment. Newer smart tvs receiving digital transmissions, sure, but that means this is not a normal "test of the emergency broadcast system" its absolutely more than that.
I've worked with television equipment for over 20 years, this is absolutely abnormal. A standard video signal should not (cannot) effect the operation of your equipment. Newer smart tvs receiving digital transmissions, sure, but that means this is not a normal "test of the emergency broadcast system" its absolutely more than that.