the frequency range of an am wave is 20herz to 20kilo herz
In Frequency Modulation (FM), if the modulation frequency is doubled, the modulation index does not necessarily double; it depends on the amplitude of the modulating signal. In Amplitude Modulation (AM), the modulation index is defined as the ratio of the peak amplitude of the modulating signal to the carrier amplitude, so it remains unchanged with varying modulation frequency. For Phase Modulation (PM), similar to FM, the modulation index is influenced by the amplitude of the modulating signal and does not inherently double with the modulation frequency. Thus, modulation frequency and modulation index are not directly linked in this way for FM, PM, or AM.
To draw the graph of modulation waves, first identify the carrier wave and the modulating signal. For amplitude modulation (AM), plot the carrier wave's amplitude varying based on the modulating signal's amplitude; the resulting waveform will show peaks that correspond to the modulating signal. For frequency modulation (FM), depict the carrier wave's frequency changing based on the modulating signal's amplitude, resulting in a waveform with varying spacing between peaks. Use appropriate scales for time and amplitude to accurately represent the modulation effects.
Then the signal will be the same amplitude.
amplitude modulating signal
because noise usually changes the amplitude not frequency.
In Frequency Modulation (FM), if the modulation frequency is doubled, the modulation index does not necessarily double; it depends on the amplitude of the modulating signal. In Amplitude Modulation (AM), the modulation index is defined as the ratio of the peak amplitude of the modulating signal to the carrier amplitude, so it remains unchanged with varying modulation frequency. For Phase Modulation (PM), similar to FM, the modulation index is influenced by the amplitude of the modulating signal and does not inherently double with the modulation frequency. Thus, modulation frequency and modulation index are not directly linked in this way for FM, PM, or AM.
It is a device or electronic circuit that changes the frequency of an oscillator according to the amplitude of modulating signal. For instance, if the modulation is linear, the modulator changes the frequency proportional to the amplitude of the modulating voltage.
In frequency modulation (FM) the amplitude does not remain constant. Instead, the amplitude varies according to the modulation index and the frequency of the modulating signal. This is in contrast to amplitude modulation (AM), where the amplitude of the carrier signal is modulated while the frequency remains constant.
To draw the graph of modulation waves, first identify the carrier wave and the modulating signal. For amplitude modulation (AM), plot the carrier wave's amplitude varying based on the modulating signal's amplitude; the resulting waveform will show peaks that correspond to the modulating signal. For frequency modulation (FM), depict the carrier wave's frequency changing based on the modulating signal's amplitude, resulting in a waveform with varying spacing between peaks. Use appropriate scales for time and amplitude to accurately represent the modulation effects.
Then the signal will be the same amplitude.
modulating signal is the low frequency signal .so we cant transmit for a long distance.so we go for modulating the signal either by modulating the amplitude or frequency or phase of the signal.
The modulation index formula in frequency modulation (FM) is given by the equation: β = Δf / fm, where β is the modulation index, Δf is the peak frequency deviation, and fm is the modulating frequency. Modulation index indicates how much the carrier frequency is being varied by the modulating signal in FM.
Amplitude Frequency
in frequency modulation, frequency of carrier signal changes. so frequency variations of carrier convey all the information in frequency modulation.
AM - Amplitude Modulation FM - Frequency Modulation
amplitude modulating signal
The three frequency components of an amplitude modulation (AM) wave are the carrier frequency, the upper sideband frequency (carrier frequency + modulating frequency), and the lower sideband frequency (carrier frequency - modulating frequency). These components are responsible for carrying the signal information in an AM wave.