decibel
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| decibel [2011/06/30 08:55] – ramonturner | decibel [2011/07/11 23:17] (current) – admin | ||
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| 40 dB attenuation indicates 0.0001 of the input power survives\\ | 40 dB attenuation indicates 0.0001 of the input power survives\\ | ||
| It should also be mentioned that often dB ratios are expressed using a third letter (or letters), such as dBm. The third letter is a reference level for the log operation. In our dBm example, dBm is used to define dB levels in a 50 Ohm RF system, using a 1 milliwatt reference level. | It should also be mentioned that often dB ratios are expressed using a third letter (or letters), such as dBm. The third letter is a reference level for the log operation. In our dBm example, dBm is used to define dB levels in a 50 Ohm RF system, using a 1 milliwatt reference level. | ||
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decibel.1309424126.txt.gz · Last modified: 2011/06/30 08:55 by ramonturner