DBc: Difference between revisions
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If the dBc figure is positive, then the relative signal strength is greater than the carrier signal strength. If the dBc figure is negative, then the relative signal strength is less than carrier signal strength. |
If the dBc figure is positive, then the relative signal strength is greater than the carrier signal strength. If the dBc figure is negative, then the relative signal strength is less than carrier signal strength. |
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Although the [[decibel]] (dB) is permitted for use alongside [[International System of Units|SI]] units, the dBc is not.<ref>[http://physics.nist.gov/ |
Although the [[decibel]] (dB) is permitted for use alongside [[International System of Units|SI]] units, the dBc is not.<ref>[http://physics.nist.gov/cuu/pdf/sp811.pdf Taylor 1995, Guide for the Use of the International System of Units (SI), NIST Special Publication SP811]</ref> |
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==References== |
==References== |
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Revision as of 17:34, 25 May 2009
dBc (decibels relative to the carrier) is the power ratio of a signal to a carrier signal, expresses in decibels. For example, phase noise is expressed in dBc/Hz at a given frequency offset from the carrier. dBc can also be used as a measurement of SFDR between the desired signal and unwanted spurious outputs resulting from the use of signal converters such as a digital-to-analog converter or a frequency mixer.
If the dBc figure is positive, then the relative signal strength is greater than the carrier signal strength. If the dBc figure is negative, then the relative signal strength is less than carrier signal strength.
Although the decibel (dB) is permitted for use alongside SI units, the dBc is not.[1]
References
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