What does dBmV specifically measure in a coaxial cable system?

dBmV is a measurement that specifically refers to the power level of a signal in decibels relative to one millivolt. In the context of a coaxial cable system, it indicates how strong the signal is at a particular point in the cable. This measurement is essential for understanding the performance of the cable system, as it directly relates to the quality and reliability of the signal being transmitted.

Signal amplitude pertains to the strength of the signal waveform, which influences how well the signal can be detected and interpreted by receiving equipment. While voltage could be a factor in defining how a signal is transmitted, dBmV more accurately describes the effective power level, which is crucial for meeting performance standards and ensuring satisfactory service quality.

By measuring signal amplitude specifically in terms of dBmV, technicians can evaluate whether the signal strength is above or below necessary thresholds, which helps in troubleshooting and ensuring optimal functioning of the coaxial cable system.