What's causing these horizontal bands of noise?
It's the middle of the day here in a low density city neighborhood. They were not present about 20 minutes ago; now they are even stronger and filling in the space between the lines.
- Cannot hear any lawnmowers or other engine equipment, very quiet outside.
- Shut off all the power to the house, ran off a battery, still see the same thing.
How do I figure out what these horizontal lines are?