dBm is a value that represents the absolute value of power (which can also be considered as a ratio based on a power of 1 mW), calculated as 10 log (power value / 1 mw). Here we introduce a method of calculating dBm to W, which is summarized as "1 benchmark" and "2 principles":
+ 3dB, power by 2 times; -3dB, power by 1/2
+ 10dBm, power by 10 times; -10dBm, power by 1/10
The above can be simply recorded as: 30 is the benchmark, equal to 1W whole, swap is not difficult, the most simple port count. Add 3 times 2, plus 10 times 10; subtract 3 from 2, minus 10 to 10.
The dBm for almost any integer can be converted to W with "1 benchmark" and "2 principles" above.
+ 1dBm and + 2dBm calculation skills
In the calculation, sometimes according to the above rules can be transformed into -1dBm and -2dBm, to achieve the purpose of rapid mouth speed, namely: