IEVref:713-10-67ID:
Language:enStatus: Obsolete
Term: spot noise factor (of a linear two-port device)
Synonym1: spot noise figure (of a linear two-port device)
[Preferred]
Synonym2:
Synonym3:
Symbol: F(f)
Definition: the ratio of the available power spectral density of the noise appearing at a given frequency at the output of a given linear two-port device, to the spectral density which would be present at the output if the only source of noise were the thermal noise due to a one-port device connected to the input and which is assumed to have at all frequencies a spot noise temperature equal to the reference thermodynamic temperature fixed by convention around 290 K

NOTE 1 – The spot noise factor F(f) is related to the equivalent spot noise temperature, T(f), as follows:
F(f)=1+ T(f) T 0 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacaWGgbGaaiikaiaadAgacaGGPaGaeyypa0JaaGymaiabgUcaRmaa laaabaGaamivaiaacIcacaWGMbGaaiykaaqaaiaadsfadaWgaaWcba GaaGimaaqabaaaaaaa@442B@
where T0 is the reference thermodynamic temperature.

NOTE 2 – The value of the ratio F(f) may be expressed in decibels. In English, the term “noise factor” is generally employed when the ratio is expressed arithmetically, and “noise figure” is employed when the ratio is expressed in decibels.


Publication date:1998-04
Source702-08-57 MOD
Replaces:
Internal notes:2017-06-02: Cleanup - Remove Attached Image 713-10-67.jpg
CO remarks:
TC/SC remarks:
VT remarks:
Domain1:
Domain2:
Domain3:
Domain4:
Domain5: