What does "Echo" refer to on a signal meter?

"Echo" on a signal meter refers to signal reflection and bouncing. This phenomenon occurs in a transmission medium when an electromagnetic signal encounters obstacles or changes in the medium, causing part of the signal to reflect back towards the source. This behavior can impact the quality of communication and signal integrity, leading to potential issues such as ghosting or multipath interference. Recognizing echo is essential for technicians because it helps in diagnosing problems with signal propagation and ensuring optimal performance of the communication system.

In contrast, the other options relate to different aspects of signal analysis. Signal amplification focuses on strengthening the signal, measurement of signal distortion pertains to the alteration of the signal's original waveform, and signal strength analysis deals specifically with the overall power of the signal being transmitted. All of these are important concepts, but they do not specifically address the phenomenon of reflection and bouncing that "Echo" relates to.