IEVref: 561-03-22 ID: Language: en Status: Standard Term: phase noise Synonym1: Synonym2: Synonym3: Symbol: Definition: frequency-domain measure of the short-term frequency stability of an oscillatorNote 1 to entry: This phase noise is normally expressed as the power spectral density of the phase fluctuations, ${S}_{\varphi }\left(f\right)$, where the phase fluctuation function is $\varphi \left(t\right)=2\pi Ft-2\pi {F}_{0}t$. The spectral density of phase fluctuation can be directly related to the spectral density of frequency fluctuation by the following formula: ${S}_{\varphi }\left(f\right)=\left(\frac{{F}_{0}}{f}\right){S}_{y}\left(f\right)\text{\hspace{0.17em}}{\text{rad}}^{\text{2}}\text{/Hz}$ In the preceding formulae: F is the oscillator frequency; F0 is the average oscillator frequency; f is the Fourier frequency. Publication date: 2014-11 Source: Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: