Amplifiers have diplex filters that block signals in that frequency from traveling in the wrong direction, so they will reflect the reflected signal back again. For example, an upstream signal from a cable modem may pass through an amplifier, hit an impairment like water in a tap, and part of the signal will reflect back downstream toward the amplifier. The amplifier will not allow that reflected signal to pass through it and will reflect it back upstream toward the impaired tap, which will reflect a portion of that signal back toward the amplifier, and so on.
It only mention upstream, is it still called “micro reflection” when you see reflection on the downstream channels?
Yes. It is still called a micro reflection when on the downstream.
Can micro reflections travel through an amplifier?
Amplifiers have diplex filters that block signals in that frequency from traveling in the wrong direction, so they will reflect the reflected signal back again. For example, an upstream signal from a cable modem may pass through an amplifier, hit an impairment like water in a tap, and part of the signal will reflect back downstream toward the amplifier. The amplifier will not allow that reflected signal to pass through it and will reflect it back upstream toward the impaired tap, which will reflect a portion of that signal back toward the amplifier, and so on.
so theoretically anything can cause
Yeah but only sum times.