HB3YAQLucerne
dBm
dBm expresses an absolute power level relative to 1 milliwatt, combining the logarithmic dB scale with a fixed power reference.
Also found under: dBm · Milliwatt · Power Level
A concrete example
0 dBm = 1 mW, 10 dBm = 10 mW and 30 dBm = 1 W.
What to keep in mind
Do not interchange dB and dBm: 3 dB is a ratio, while 3 dBm is a power level.
Further reference
Original explanation based on the technical documentation. Reviewed on 15 October 2026.
Analog Devices · Measurement and Control of RF Power ↗