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The symbol dBrn or dB(rn) is an abbreviati … 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. With 144 weightings, a one milliwatt, 1000 Hz white noise tone will also read +90 dBrn, but the same 3 kHz power will only read +82 dBrn, because of the different frequency weighting. Note: In telecommunications, dBrn adjusted also called dBa denotes "decibels adjusted", i.e. weighted absolute noise power. This is totally unrelated to and not a synonym for dB(A). unrelated to and not a synonym for dB(A).
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41004
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1259
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1027587977
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, http://dbpedia.org/resource/Line_%28electrical_engineering%29 +
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, http://dbpedia.org/resource/Category:Units_of_measurement +
, http://dbpedia.org/resource/Picowatt +
, http://dbpedia.org/resource/DB%28A%29 +
, http://dbpedia.org/resource/Milliwatt +
, http://dbpedia.org/resource/Reference_noise +
, http://dbpedia.org/resource/White_noise +
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y
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May 2021
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|
| rdfs:comment |
The symbol dBrn or dB(rn) is an abbreviati … 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. dBrn, because of the frequency weighting.
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| rdfs:label |
DBrn
|
