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Power level attenuation (dBm)

  1. Feb 5, 2013 #1
    Hi,

    I have a question regarding frequency, power...
    Let's say I have signal with power level of X dBm and the signal has been attenuated by Y times.
    What is the correct formula to use to get the final power ?


    Thank You
     
  2. jcsd
  3. Feb 5, 2013 #2

    berkeman

    User Avatar

    Staff: Mentor

    For power ratios, use 10*log(Pf/Pi)
     
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