Frequency deviation () is used in FM radio to describe the difference between the minimum or maximum extent of a frequency modulated signal, and the nominal center or carrier frequency. The term is sometimes mistakenly used as synonymous with frequency drift, which is an unintended offset of an oscillator from its nominal frequency.
The frequency deviation of a radio is of particular importance in relation to bandwidth, because less deviation means that more channels can fit into the same amount of frequency spectrum. The FM broadcasting range between 87.5 and 108 MHz uses a typical channel spacing of 100 or 200 kHz, with a maximum frequency deviation of +/-75 kHz, in some cases leaving a buffer above the highest and below the lowest frequency to reduce interaction with other channels.[1]
The most common FM transmitting applications use peak deviations of +/-75 kHz (100 or 200 kHz spacing), +/-5 kHz (15–25 kHz spacing), +/-2.5 kHz (3.75-12.5 kHz spacing), and +/-2 kHz (8.33 kHz spacing, 7.5 kHz spacing, 6.25 kHz spacing or 5 kHz spacing).
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Frequencydeviation ( f Δ {\displaystyle f_{\Delta }} ) is used in FM radio to describe the difference between the minimum or maximum extent of a frequency...
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f {\displaystyle \Delta f} is the peak frequencydeviation; f m {\displaystyle f_{m}} is the highest frequency in the modulating signal. For example,...
amplitude of the carrier, with its frequency remaining constant. With FM, frequencydeviation from the assigned carrier frequency at any instant is directly proportional...
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telecommunications, frequency drift is an unintended and generally arbitrary offset of an oscillator from its nominal frequency. Causes may include component...
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code frequencydeviation is 1/1,540 times the carrier frequencydeviation for L1 because the code frequency is 1/1,540 of the carrier frequency (see §...
broadcast, however, as it only has a frequencydeviation of ±25 kHz, whereas regular FM broadcasting has a deviation of ±75 kHz. The SAP subcarrier is located...
Bn is the noise bandwidth, Δf is the peak frequencydeviation, W is the sinusoidal modulating frequency. Deshmukh, Sanjay; Bhosle, Udhav (2016). "Performance...
cosine-term is the carrier at its angular frequency ω {\displaystyle \omega } , and the instantaneous phase deviation ϕ ( t ) {\displaystyle \phi (t)} . This...
dispersion of a probability distribution or frequency distribution. It is defined as the ratio of the standard deviation σ {\displaystyle \sigma } to the mean...
a grid scale as of 2020); allowing larger frequencydeviation than typical 59.5 Hz (Texas allows frequency to drop to 59.3 Hz, an even smaller Quebec...
phase noise, spectral density of phase deviations, and spectral density of fractional frequencydeviations. The effects of acceleration and vibration...
single frequency, interfering with terrestrial microwave links in the same frequency band. In half transponder mode, the frequencydeviation of the composite...
each instrument. This deviation from equal temperament is called the Railsback curve. The following equation gives the frequency f (Hz) of the nth key...
method is that the frequencydeviation—the amount of modulation—must be kept small to minimize distortion. The maximum deviation is a fraction of 1 kilohertz...
the CPFSK signal, fc is the base carrier frequency, and Df is a parameter that controls the frequencydeviation of the modulated signal. The integral located...
The average absolute deviation (AAD) of a data set is the average of the absolute deviations from a central point. It is a summary statistic of statistical...
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating...
smart controls, this will immediately cause unacceptable voltage or frequencydeviation in the microgrids. To remedy such situations, it is possible to interconnect...
light. Deviation of laser frequency from this condition will decrease frequency transmission. The relation between transmission and frequencydeviation is...
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