You have a signal issue going to your box. It could be the line anywhere from the street to your box, including any loose connections at the outlets.
Not on the clock now, but I think I can jump start this if the topic start will play ball.
Pixelation happens in digital TV when "errored seconds" occur.
"Severely errored seconds" will cause the picture to freeze/pause.
FYI: Analog TV doesn't pixelate, it does other weird things (like hum noise, color skew, snow static, etc.) So the pixelation will always be a digital issue of some kind.
What causes errored seconds?
The signal is too weak compared to the background noise.
1. Questions for you, the customer, things that need to be added to the workorder notes:
2. Now call in about getting a troublecall, can ask the CSR the questions in the next step.
3. Questions for the CSR (customer service representative) on the phone to troubleshoot:
4. Questions for the field tech:
If all these questions are answered, you'll almost certainly get your problem fixed. Lack of communication will not lead to resolution. I've tried to simplify things, I sincerely hope my effort help you out (or anyone else reading it).