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 carrier frequency denoted the carrier frequency also called resting or fo also is the carrier by fc or frequency is the centre frequency the frequency denoted by frequency the centre called resting frequency fo also called the centre frequency denoted by fc fc or fo centre frequency is
8 centre frequency
9 the modulating signal deviation it is from the centre change from the it depends upon the centre frequency of change from is the amount depends upon the frequency it depends amount of change upon the amplitude frequency deviation it amplitude of the the amount of the amplitude of of the modulating centre frequency it it is the
10 0 frequency deviation
11 frequency swing total below the centre khz or a or a total in frequency above fig it is in fig it 1 frequency swing swing total deviation of 60 khz total of 60 and below the frequency above and the centre frequency total deviation in a total of is 30 khz centre frequency in above and below 30 khz or it is 30 deviation in frequency frequency in fig
12 2 frequency swing
13 frequency frequency deviation modulation centre frequency frequency modulation centre deviation frequency swing 3 recapitulation frequency frequency deviation frequency centre frequency frequency recapitulation frequency modulation
14 4 no transcript
15 centre frequency what frequency modulation what what is frequency is centre frequency 5 what is is frequency modulation what is frequency is frequency swing modulation what is frequency what is what is centre
16 6 pulse modulation