What is the trigonometric representation of the AM signal (answer ASAP please)
ET3202 Fall 2017
Multiple Choice
Figure 1: An AM signal with 8 kHz bandwidth, a carrier frequency of 100 kHz, a maximum peak-to-peak value of Epp = 10V and Epp = 6V. What is the trigonometric representation of the AM signal?
a. 4 + cos(4000t)cos(100000t)
b. 5 + cos(4000t)cos(100000t)
c. 3 + 2cos(8000t)cos(200000t)
d. 4 + cos(8000t)cos(200000t)
2. What is the modulation index of the signal in Figure 1?
a. 0.25
b. 4
c. -0.25
d. -4