Set your oscilloscope to display the frequency spectrum of the input: Press the Auto-Scale button and acquire in High Resolution mode. Set the time/div to 1 ms, the Volt/div to 500 mV, and adjust the Oset, so that the time domain signal stays in the top part of the display. Remember that the time domain signal has to be completely inside the scope display before performing the FFT. To synchronize the scope with the AM signal you can rise the threshold level of the trigger to about 450 mV. Press FFT button. Inside More FFT press the Auto-Setup button. Set the center frequency to 14 kHz and the frequency span to 20 kHz. Set the Scale to 15 dB/div (You need to turn on the Fine scaling by pressing once the Scale knob) and adjust the Oset so that the frequency spectrum stays in the bottom of the display, without interfering with the time domain.. 4. Sketch both, the time domain AM signal and its frequency spectrum and explain what you see in terms of the modulation property of the Fourier transform. (Hint: What is the frequency spectrum of the message signal (co- sinusoid of