A spectrum analyzer with an input impedance of 200s is used to measure the power spectrum of an AM signal at the output of a preamplifier circuit. The AM signal has been modulated with a sine wave. The effective carrier power, Pc, is 750mw, and each sideband, PUSB and PLSB, is 120mW. Compute the following: 1- The total effective power PT. 3- The modulation index, m. 2- The peak carrier voltage, Vc. 4- The modulation voltage, Vm. 5- The lower and upper sideband voltages and sketch the waveform that you would see with an oscilloscope if it were placed in parallel with the spectrum analyzer.
A spectrum analyzer with an input impedance of 200s is used to measure the power spectrum of an AM signal at the output of a preamplifier circuit. The AM signal has been modulated with a sine wave. The effective carrier power, Pc, is 750mw, and each sideband, PUSB and PLSB, is 120mW. Compute the following: 1- The total effective power PT. 3- The modulation index, m. 2- The peak carrier voltage, Vc. 4- The modulation voltage, Vm. 5- The lower and upper sideband voltages and sketch the waveform that you would see with an oscilloscope if it were placed in parallel with the spectrum analyzer.
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Transcribed Image Text:A spectrum analyzer with an input impedance of 200s is used to measure the power
spectrum of an AM signal at the output of a preamplifier circuit. The AM signal has
been modulated with a sine wave. The effective carrier power, Pc, is 750mw, and each
sideband, PUSB and PLSB, is 120mW. Compute the following:
1- The total effective power PT.
3- The modulation index, m.
2- The peak carrier voltage, Vc.
4- The modulation voltage, Vm.
5- The lower and upper sideband voltages and sketch the waveform that you would see
with an oscilloscope if it were placed in parallel with the spectrum analyzer.
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