DFT, AM, FM Signals.

Cuthbert Nyack
This applet shows the DFT spectrum of an AM signal with carrier frequency w1 modulated by frequency w2 with modulating index m. Changing Fn changes the signal used for the modulation.



This applet shows the DTFT and DFT spectra of an FM signal with carrier frequency w1, modulating frequency w2 and modulating index d.
eg (10.0, 1.0, 2.32, 14.75, 90, 2.4, 90, 37.0, 20.0, 0.2) shows the spectrum with modulating index d = 2.4 with a frequency deviation of 2.4.
eg (12.0, 1.5, 1.16, 9.4, 60, 3.6, 60, 37.0, 15.0, 0.3) shows the spectrum with modulating index d = 2.4 with a frequency deviation of 3.6.
eg (12.0, 2.0, 1.16, 7.34, 60, 4.8, 60, 37.0, 15.0, 0.3) shows the spectrum with modulating index d = 2.4 with a frequency deviation of 4.8.
eg (10.0, 2.5, 0.76, 10.7, 90, 6.0, 90, 37.0, 17.0, 0.2) shows the spectrum with modulating index d = 2.4 with a frequency deviation of 6.0.




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COPYRIGHT 2007 Cuthbert Nyack.