Signal

FFT of a AM modulated signal

FFT of a AM modulated signal
  1. What is the frequency of AM signal?
  2. How do you calculate AM modulated signal expression?
  3. What happens when an AM signal is over modulated?

What is the frequency of AM signal?

The Amplitude Modulated (AM radio) carrier frequencies are in the frequency range 535-1605 kHz. Carrier frequencies of 540 to 1600 kHz are assigned at 10 kHz intervals.

How do you calculate AM modulated signal expression?

The equation for the overall modulated signal is obtained by multiplying the carrier and the modulating signal together. The constant A is required as it represents the amplitude of the waveform. Note also that the sidebands are separated from the carrier by a frequency equal to that of the tone.

What happens when an AM signal is over modulated?

Overmodulation results in sharp edges or bends in the waveform of the envelope of the transmitted signal, regardless of the audio frequency. It results in false emissions by the modulated carrier and distortion of the recovered modulating signal.

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