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    The difference between dBm, dBm0, dBmP units

    I am confused with these units. Who can help me to understand the meaming of them, or suggest some related documents. thanks a lot.

    •   Alt17th October 2003, 05:06

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    db dbm dbm0

    dBm is power measured in milliwatts and expressed in dB above or below one mW.

    dBm0 is almost similar except it is power relative to a zero level that is different from 1 mW.

    dBmP is relative to Picowatts of noise psophometrically weighted (pWp)

    These terms come from copper wire telephone systems and go back 100+ years in some cases.

    http://www.sutron.com/products/refer...uides/eirp.htm is more information.



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