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.