frequency modulation - PowerPoint PPT Presentation


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frequency modulation


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Title: frequency modulation

1 no transcript
2 frequency modulation fm
3 frequency modulation fm only frequency of the carrier is changed and not its amplitude amplitude of the modulating signal determines the amount of change in frequency rate of change is determined by the frequency of the modulating signal
4 frequency modulation fm amount of change in the carrier wave increases with an increase in modulating signal voltage
5 frequency modulation fm
6 frequency modulation fm
7 by fc or is the carrier fc or fo or fo also the carrier frequency the centre frequency denoted by fc frequency is the frequency the centre centre frequency is fo also called centre frequency the also called resting carrier frequency denoted called resting frequency frequency denoted by
8 centre frequency
9 is the amount amount of change frequency it depends the modulating signal from the centre change from the upon the amplitude deviation it is the amplitude of centre frequency it of change from it depends upon of the modulating frequency deviation it the amount of the centre frequency depends upon the it is the amplitude of the
10 0 frequency deviation
11 is 30 khz total deviation in frequency above and total of 60 fig it is frequency in fig 1 frequency swing swing total deviation the centre frequency khz or a a total of in frequency above and below the above and below frequency swing total or a total 30 khz or in fig it it is 30 deviation in frequency of 60 khz below the centre centre frequency in
12 2 frequency swing
13 centre frequency frequency frequency deviation frequency 3 recapitulation frequency modulation centre frequency frequency modulation centre recapitulation frequency modulation frequency frequency deviation deviation frequency swing
14 4 no transcript
15 what is frequency what is centre modulation what is frequency modulation what 5 what is is frequency modulation centre frequency what is frequency swing what is frequency is centre frequency frequency what is
16 6 pulse modulation