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Frequency Modulation
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- 1Define frequency modulation (FM)The frequency of the carrier is changed in accordance with the amplitude of the modulating wave
- 2Define centre frequency?The frequency occupied by the carrier when in an un-modulated state
- 3Define frequency deviation (fd)The amount of change in frequency from the centre frequency in the modulated wave
- 4Define carrier/frequency swing?The difference between the highest and lowest frequencies the modulated wave can attain
- 5Define deviation ratio?The ratio of the maximum frequency deviation and the highest permissable modulating frequency
- 6Define modulation index (MI)The decimal number representing the ratio of the frequency deviation and the highest frequency of the modulating wave
- 7How would you work out the modulation index?MI = fd/fm
- 8How would you work out the transmission bandwidth (FM)?Tx BW = 2(fd + fm) = Hz
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- BigDave (Topics) BigDave Fichas sobre Frequency Modulation, creado por B L el 13/02/2017.
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