3 discrete values
A special case of amplitude modulation is where the baseband signal is a pure sine wave. If??c?is the carrier frequency and??<m the base band signal, the spectrum of the modulated signal contains 3 discrete values
?c,??c?+??m?,??c?-?m
A special case of amplitude modulation is where the baseband signal is a pure sine wave. If??c?is the carrier frequency and??m the base band signal, the spectrum of the modulated signal contains the values ?c,??c?+??m?,??c?-?m
AM/AC
If AC and AM are the amplitudes of the carrier and baseband signals then modulation index in amplitude modulation is AM/AC
small
To reduce the distortion in amplitude modulation, modulation index is kept small
0.5
The?modulation index?(or?modulation?depth) of a?modulation?scheme describes by how much the?modulated?variable of the carrier signal varies around its unmodulated level. It is defined differently in each?modulation?scheme. See: Amplitude?modulation index. Frequency?modulation index.