dBm

A unit of measure used to reference signal strength to electrical power level. Unlike dB, which is a relative measure, dBm is an absolute measure, and can be used to express very small values (dBm) and very large values (dBW). The baseline reference relationship is 1mW = 0 dBm. A doubling of signal power yields an increase of approximately 3 dBm (2mW = 3 dBm) and halving of signal power yields a loss of approximately 3 dBm (500