My ISP is cable. Called and said they needed in my house to find the source of the signal that was affecting everyone else in my neighborhood. Literally nothing had changed and my house has been connected since 2010.
The tech arrived and I had them start outside. He replaced every connection/coupling and kept testing. After all of them were replaced, his testing machine showed a perfect signal. Noise eliminated. I was not charged for this service.
I found this baffling. My neighbor’s coax connections affect me?
Can confirm this, former signal engineer for the first cable internet provider and a ham. Bad connections, unmatched RG-8, and trashed filters were the bane of my existence. That and crappy installers. Thank the deities for QoS.