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Stop Using the Ambiguous dBM!

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Absolute decibels, especially the dBm, are still subject to much confusion and many mistakes. A historical survey of the dB is given, which ends in the new standard IEC 268. This standard abandons further use of the dBm, where the dB re 0.775 V no more corresponds to a definite symbol. A new term is proposed and some other new points of view are given.

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