DBm
dBm is an abbreviation for the dB referenced to one milliwatt.
Note 1: dBm is used in communication work as a measure of absolute power values. Zero dBm equals one milliwatt.
Note 2: In DOD practice, unweighted measurement is normally understood, applicable to a certain bandwidth, which must be stated or implied.
Note 3: In European practice, psophometric weighting may be implied, as indicated by context; equivalent to Zero dBm transmission level point
Source: from Federal Standard 1037C and from MIL-STD-188
