30.) An audio system requires a frequency response from 50 Hz to 15kHz for high fidelity. If thissignal were transmitted using AM, what bandwidth would it require?
33.) An AM signal has the following characteristics: fc=150 MHz Ec=50V fm=3kHz Em=40VFind modulation index, bandwidth, and peak voltage of the upper side frequency
48.) An AM CB transmitter with a carrier frequency of 27.005 MHz is connected as shown in figure 3.22a. The oscilloscope display is shown in fig 3.22b. Sketch the same signal as it would appear on the spectrum analyzer?