You are not changing the carrier signal, only the message. In the scope the center Page 5 of 6 frequency should remain at 14kHz,
the frequency span at 20kHz and the dB/div at 15dB. Here are the AM signal in time domain and its frequency spectrum. Explain what you see. (Hint: Remember the Fourier analysis of the square wave performed in Lab #3.)
We will see a waveform displayed on the screen and it will be PWM(pulse width modulation) of sinusoidal wave,this wave should have a frequency of 14KHz and it will form a vibration spectrum.
