题目内容：

0 dBm = 10log(1) mW = 1 mW 怎么换算的?
0 dBm = 10log(1) mW = 1 mW 怎么换算的?10log1不是等于0吗?10log1是不是等于10*log10^0=10*0=0?怎么会出来1mw那、?

优质解答

X = 1000000000000000（多少个了?）= 10logX = 150 dBX = 0.000000000000001 = 10logX = -150 dBdBm 定义的是 miliwatt.0 dBm = 10log1 mw； dBw 定义 watt.0 dBw = 10log1 W = 10log1000 mw = 30 dBm.在dB,dBm,dBw...