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Frequency Deviation Formula

GoFrequency Deviation provided Modulation Index Formula

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Frequency Deviation in FM is defined as the way to describe the difference between the minimum and maximum extent of a frequency modulated signal and the carrier frequency. Check FAQs

Δf = K f \cdot A m(peak)

Δf - Frequency Deviation?K_f - Frequency Sensitivity?A_m(peak) - Peak Amplitude of Message?

Frequency Deviation Example

With values

With units

Only example

Here is how the Frequency Deviation equation looks like with Values.

Here is how the Frequency Deviation equation looks like with Units.

Here is how the Frequency Deviation equation looks like.

30 = 0.75 \cdot 40

30Hz = 0.75Hz \cdot 40V

30 = 0.75 \cdot 40

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Frequency Deviation Solution

Follow our step by step solution on how to calculate Frequency Deviation?

FIRST Step Consider the formula

Δf = K f \cdot A m(peak)

Next Step Substitute values of Variables

∴

Δf = 0.75Hz \cdot 40V

Next Step Prepare to Evaluate

∴

Δf = 0.75 \cdot 40

LAST Step Evaluate

∴

Δf = 30Hz

Frequency Deviation Formula Elements

Variables

Frequency Deviation

Frequency Deviation in FM is defined as the way to describe the difference between the minimum and maximum extent of a frequency modulated signal and the carrier frequency.

Symbol: Δf

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Frequency Deviation

Frequency Sensitivity

Frequency Sensitivity is the dependence of the critical amplitude of the signal upon its frequency and a resonance between the intrinsic oscillations of a neuron and the signal.

Symbol: K_f

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Frequency Sensitivity

Peak Amplitude of Message

Peak Amplitude of Message is the maximum positive or negative deviation of a waveform from its zero reference level in a message signal.

Symbol: A_m(peak)

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Peak Amplitude of Message

Other Formulas to find Frequency Deviation

Go Frequency Deviation provided Modulation Index

Δf = β \cdot f mod

Other formulas in Frequency Modulation category

Go Bandwidth in DSB-SC

BW DSB = 2 \cdot f m-DSB

Go Bandwidth of VSB

BW VSB = f m-DSB + f v-DSB

Go Pre Detection Signal to Noise Ratio

SNR pre = \frac{{A DSB}^{2} \cdot P DSB-SC}{2 \cdot N 0-DSB \cdot BW t-DSB}

Go Transmitted Power of DSB-SC

P t-DSB = P U-DSB + P L-DSB

How to Evaluate Frequency Deviation?

Frequency Deviation evaluator uses Frequency Deviation = Frequency Sensitivity*Peak Amplitude of Message to evaluate the Frequency Deviation, Frequency Deviation in FM is defined as the way to describe the difference between the minimum and maximum extent of a frequency modulated signal and the carrier frequency. Frequency Deviation is denoted by Δf symbol.

How to evaluate Frequency Deviation using this online evaluator? To use this online evaluator for Frequency Deviation, enter Frequency Sensitivity (K_f) & Peak Amplitude of Message (A_m(peak)) and hit the calculate button.

FAQs on Frequency Deviation

What is the formula to find Frequency Deviation?

The formula of Frequency Deviation is expressed as Frequency Deviation = Frequency Sensitivity*Peak Amplitude of Message. Here is an example- 105 = 0.75*40.

How to calculate Frequency Deviation?

With Frequency Sensitivity (K_f) & Peak Amplitude of Message (A_m(peak)) we can find Frequency Deviation using the formula - Frequency Deviation = Frequency Sensitivity*Peak Amplitude of Message.

What are the other ways to Calculate Frequency Deviation?

Here are the different ways to Calculate Frequency Deviation-

Frequency Deviation=Modulation Index in FM*Modulating Frequency

Can the Frequency Deviation be negative?

No, the Frequency Deviation, measured in Frequency cannot be negative.

Which unit is used to measure Frequency Deviation?

Frequency Deviation is usually measured using the Hertz[Hz] for Frequency. Petahertz[Hz], Terahertz[Hz], Gigahertz[Hz] are the few other units in which Frequency Deviation can be measured.

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Frequency Deviation Formula

​GoFrequency Deviation provided Modulation Index Formula

Frequency Deviation Example

Frequency Deviation Solution

Frequency Deviation Formula Elements

Other Formulas to find Frequency Deviation

Other formulas in Frequency Modulation category

How to Evaluate Frequency Deviation?

FAQs on Frequency Deviation

Variable Name

GoFrequency Deviation provided Modulation Index Formula