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DBm0

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This is an old revision of this page, as edited by Matthieu Chevrier (talk | contribs) at 21:31, 22 January 2006. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

dBm0 is an abbreviation for the power in [dBm] measured at a zero [transmission level point].

dBm0 is a concept used (amongst other areas) in audio/telephony processing since it allows a smooth integration of analog and digital chains. Noticeably, for A-law and μ-law CODECS the standards defines a sequence which has a 0dBm output.

Note1: a consequence for the A-law and μ-law CODECS of the 0dBm0 definition is that they have a respective 3.14dBm0 and 3.17dBm0 maximum output (ratio between the max amplitude of the sinewave and the maximum code).

Note2: 0dBm0 is often replaced by or used instead of digital milliwatt or zero transmission level point.

Sources: ETSI, [G.711]

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