Why measure rx level in negative value?

Measuring the RX level in negative values is common in telecommunications because it expresses signal strength in decibels (dBm), where a lower (more negative) value indicates a weaker signal. This logarithmic scale allows for easier comparison of signal levels, as it can represent a wide range of signal intensities compactly. Negative values help identify the threshold at which the signal becomes unusable, aiding in network optimization and troubleshooting.