NETW310_Module_6_Project

A carrier signal is amplitude modulated by a sinewave. The resulting AM waveform is shown below. 3.5V- 1V- a) What is the amplitude of the carrier signal? b) c) To achieve 75 percent modulation, what amplitude of the modulating signal is needed? d) Calculate the effective voltage of the AM signal What is the modulation index?

Why is a high percentage of modulation desirable?

6.a. Which of the following can you accurately measure using an OSA?A. Signal power in a channel onlyB. Spectral width of a channel onlyC. Center wavelength of a signal onlyD. Signal power and spectral width of a channel and center wavelength of a signal6.b. Which instrument should you use to determine the receiver sensitivity threshold during a receiver sensitivity test?A. BER testerB. OTDRC. Reel testerD. Variable optical attenuator

The baseband signal modulates a 98 kHz carrier sine wave. Using frequency and amplitude labelling similar to that in Figure 2, sketch the spectrum of the modulated signal using a template, similar to that in Figure 3, for the following modulations: AM with the amplitude of the carrier wave being 20 V   DSBSC   SSB – the lower sideband   SSB – the upper sideband

IX. A carrier signal is amplitude modulated by a sinewave. The resulting AM waveform is shown below. a) b) c) d) 5.5V- 2V What is the percentage of modulation? What is the amplitude of the carrier signal? To achieve 75 percent modulation, what amplitude of the modulating signal is needed? Calculate the effective voltage of the AM signal

Please help with parts B4 and B5 of this practice question. Thank you