b) A single sideband suppressed carrier (SSB-SC) amplitude modulated signal is defined as v,(t) = 2cos (2n × 1.01 × 105t) Demodulate the SSB-SC signal, vs(t), using the synchronous demodulator with the local oscillator frequency set to 105HZ.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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a) A Double-Sideband Amplitude Modulator is shown in
fig. 1
V DC
cos(2n x 2 x 105t)
m(t)
v,(1)
Σ
Figure 1
Transcribed Image Text:a) A Double-Sideband Amplitude Modulator is shown in fig. 1 V DC cos(2n x 2 x 105t) m(t) v,(1) Σ Figure 1
b) A single sideband suppressed carrier (SSB-SC)
amplitude modulated signal is defined as
v,(t) = 2cos (2n × 1.01 × 105t)
Demodulate the SSB-SC signal, Vs(f), using the
synchronous demodulator with the local oscillator
frequency set to 10 Hz.
c) A frequency modulated (FM) signal has a peak
deviation of 3kHz, an unmodulated carrier frequency of
1.5MHZ, and a carrier amplitude of 2V.
If the input to the modulator is a message signal
i.
defined as m(t) = 3cos (27T × 2 × 10³t), determine
the modulation index of the FM signal.
Sketch accurately the significant frequency
spectrum of the FM signal.
ii.
Calculate the total power in the unmodulated carrier
signal and the total power in the significant
spectrum, assuming a load resistance of 500.
ii.
Transcribed Image Text:b) A single sideband suppressed carrier (SSB-SC) amplitude modulated signal is defined as v,(t) = 2cos (2n × 1.01 × 105t) Demodulate the SSB-SC signal, Vs(f), using the synchronous demodulator with the local oscillator frequency set to 10 Hz. c) A frequency modulated (FM) signal has a peak deviation of 3kHz, an unmodulated carrier frequency of 1.5MHZ, and a carrier amplitude of 2V. If the input to the modulator is a message signal i. defined as m(t) = 3cos (27T × 2 × 10³t), determine the modulation index of the FM signal. Sketch accurately the significant frequency spectrum of the FM signal. ii. Calculate the total power in the unmodulated carrier signal and the total power in the significant spectrum, assuming a load resistance of 500. ii.
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