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Power/Level (dBm): The output capability of an amplifier, generally in units of W, MW, and dBm. dBm is an absolute power level expressed in decibels, taking 1mW as the reference value.
Conversion formula:
Level (dBm) = 10lgw
5W → 10lg5000 = 37dBm
10W → 10lg10000 = 40dBm
20W → 10lg20000 = 43dBm
It is not difficult to see from the above that for every doubling of power, the level value increases by 3dBm
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