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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.
695:{\displaystyle P_{\mathrm {S} }-P_{\mathrm {C} }=10\log _{10}\left({\frac {\mathrm {S} }{\mathrm {C} }}\right)=10\log _{10}\left({\frac {10\,\mathrm {\mu W} }{0{.}1\,\mathrm {mW} }}\right)=-10\,\mathrm {dBc} }
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It is also possible to compute the dBc power of noise signal with respect to reference signal directly as logarithm of their ratio as follows:
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397:{\displaystyle P_{\mathrm {S} }=10\log _{10}\left({\frac {10\,\mathrm {\mu W} }{1\,\mathrm {mW} }}\right)=-20\,\mathrm {dBm} }
282:{\displaystyle P_{\mathrm {C} }=10\log _{10}\left({\frac {0{.}1\,\mathrm {mW} }{1\,\mathrm {mW} }}\right)=-10\,\mathrm {dBm} }
957:
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53:) between the desired signal and unwanted spurious outputs resulting from the use of signal converters such as a
516:{\displaystyle P_{\mathrm {S} }-P_{\mathrm {C} }=-20\,\mathrm {dBm} -(-10\,\mathrm {dBm} )=-10\,\mathrm {dBc} }
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Taylor 1995, Guide for the Use of the
International System of Units (SI), NIST Special Publication SP811
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The calculation of dBc difference between noise signal and reference signal is then as follows:
49:
offset from the carrier. dBc can also be used as a measurement of
Spurious-Free Dynamic Range (
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Power of reference signal expressed in decibel is :
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84:If a carrier (reference signal) has a power of
292:Power of noise expressed in decibel is :
159:{\textstyle \mathrm {S} =10\,\mathrm {\mu W} }
122:{\textstyle \mathrm {C} =0{.}1\,\mathrm {mW} }
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735:Encyclopedia of Laser Physics and Technology
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29:) is the power ratio of a signal to a
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72:(dB) is permitted for use alongside
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973:Logarithmic scales of measurement
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968:Telecommunications engineering
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1:
963:Radio frequency propagation
55:digital-to-analog converter
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24:decibels relative to the
76:units, the dBc is not.
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33:signal, expressed in
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59:frequency mixer
37:. For example,
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913:expanding it
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871:link budget
45:at a given
39:phase noise
952:Categories
707:References
788:(or dBmW)
675:−
636:μ
621:
580:
549:−
496:−
472:−
466:−
448:−
430:−
377:−
346:μ
331:
262:−
208:
150:μ
47:frequency
862:See also
774:suffixes
35:decibels
821:(radar)
771:Decibel
80:Example
70:decibel
31:carrier
26:carrier
802:dBm/Hz
850:dB-Hz
57:or a
909:stub
845:dBrn
840:dBFS
825:dBsm
776:(dB)
51:SFDR
835:dBi
830:dBc
819:dBZ
814:dBA
807:PSD
797:dBV
792:dBW
786:dBm
612:log
571:log
322:log
199:log
20:dBc
954::
678:10
631:10
616:10
608:10
575:10
567:10
499:10
475:10
451:20
380:20
341:10
326:10
318:10
265:10
203:10
195:10
166:.
145:10
74:SI
61:.
43:Hz
940:e
933:t
926:v
915:.
763:e
756:t
749:v
702:.
689:c
686:B
683:d
672:=
668:)
661:W
658:m
653:1
649:.
645:0
639:W
625:(
605:=
601:)
595:C
590:S
584:(
564:=
558:C
553:P
543:S
538:P
510:c
507:B
504:d
493:=
490:)
486:m
483:B
480:d
469:(
462:m
459:B
456:d
445:=
439:C
434:P
424:S
419:P
391:m
388:B
385:d
374:=
370:)
363:W
360:m
355:1
349:W
335:(
315:=
309:S
304:P
276:m
273:B
270:d
259:=
255:)
248:W
245:m
240:1
234:W
231:m
226:1
222:.
218:0
212:(
192:=
186:C
181:P
153:W
142:=
138:S
116:W
113:m
108:1
104:.
100:0
97:=
93:C
22:(
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