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About: DBrn     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:UnitOfMeasurement113583724, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: yago:WikicatUnitsOfMeasurementyago:Abstraction100002137yago:DefiniteQuantity113576101yago:Measure100033615organisationyago:UnitOfMeasurement113583724 New Facet based on Instances of this Class

The symbol dBrn or dB(rn) is an abbreviation for decibels above reference noise. Weighted noise power in dB is referred to 1.0 picowatt. Thus, 0 dBrn = -90 dBm. Use of 144 line, 144-receiver, or C-message weighting, or flat weighting, can be indicated in parentheses. With C-message weighting, a one-milliwatt, 1000 Hz tone will read +90 dBrn, but the same power as white noise, randomly distributed over a 3 kHz band will read approximately +88.5 dBrn, because of the frequency weighting.