What is the dBm or dBmW

A unit of measure used to reference signal strength level. unlike dB, this is relative measure, dBm is an absolute measure.dBm ( Decibel-milliwatts ) or dBmW is a short from for the power ratio in decibels (dB) of the measured power referenced to one milli watt (mW). Most communication systems human speech, microwave and fiber optic networks as a convenient measure of absolute power because of its capability to express both very large and very small...

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