405exp3w2 - One should be a power diode (i.e. 1N4001) and...

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California State Polytechnic University, Pomona Department of Electrical and Computer Engineering ECE 405L Electronic Communications Laboratory Experiment #3 Properties of Amplitude Modulation and Demodulation Waveforms Objective: To investigate the mathematical properties of Amplitude Modulation/Demodulation waveforms using Common communications laboratory equipment. Pre-lab:1) Calculate the Fourier Spectrum for an amplitude modulated waveform having a carrier of 1 MHz, modulation of 10 KHz, and modulation percentage of: a) 50% b) 100% Set the amplitude of the carrier at 1 volt peak. 2) Calculate the Fourier Spectrum for an amplitude modulated waveform having a carrier of 1 MHz, modulation of 100 KHz, and modulation percentage of: a) 50% b) 100% Set the amplitude of the carrier at 1 volt peak. 3) Calculate the Fourier Spectrum for a switching amplitude demodulated waveform. You will need to obtain two different diodes for this part of the experiment.
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Unformatted text preview: One should be a power diode (i.e. 1N4001) and the other a small signal diode (i.e. 1N4148). 4) Calculate the resulting Fourier Spectrum when you pass the waveforms of part 1 through the demodulator of part 3. Lab: Using the equipment in the laboratory construct the amplitude modulated waveforms described in the pre-lab then measure and record the Fourier Spectrums for each part described above. Make plots of the time and frequency (both continuous and discrete) domains for each waveform. Bring the necessary parts to construct the demodulator designed in the pre-lab part 2. Pass the waveforms through the demodulator and record all appropriate waveforms. Prove the Nyquist Criteria by showing a plot in the frequency domain. Post-Lab: In your report explain the differences between your calculated and your measured values....
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This note was uploaded on 11/28/2010 for the course ECE 405L taught by Professor Cockrum during the Fall '10 term at Cal Poly Pomona.

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405exp3w2 - One should be a power diode (i.e. 1N4001) and...

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