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dBm

Discussion in 'Wiki' started by mbenonis, Aug 31, 2008.

  1. mbenonis

    mbenonis Wireless Guy Administrator Premium Member

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    dBm is a type of decibel measurement, referenced to one milliwatt (mW). Measurements in dBm can be converted to and from Watts, but not voltage or current without knowledge of the load impedance (see Ohm's Law).

    To convert a value x, in Watts, to a value, y, in dBm:
    y = 10 * log_10(x / 0.001)

    To convert a value y, in dBm, to a value x, in Watts:
    x = 0.001 * 10^(y / 10)
     

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