Study review questions

QUESTION 5 Select the correct statement(s) regarding amplitude modulation (AM) a. If the AM Index is greater than 1 (i.e., >1), then over m0dulation occurs leading to signal distortion b. With AM, the message is captured as amplitude changes to the carrier's amplitude. C. The AM modulated signal bandwidth is dependent upon the highest frequency (fm), and frequency bandwidth, of the message d. All of the above are correct QUESTION 6 Amplitude Modulation (AM) describes a method where the baseband message is represented by carrier's frequency. True False QUESTION 7 Select the true statement regarding Amplitude Modulation (AM). a. An increase in message amplitude, Am, results in a higher AM Index, HAM b. An increase in message amplitude, Am, results in an increase in occupied frequency bandwidth. c. As the message frequency increases, the occupied frequency bandwidth decreases. d. Over-modulation occurs when the carrier wave amplitude, Ac is greater than the message wave amplitude, Am QUESTION 8 Given the following parameters, select the correct equation for the modulated carrier signal. Am=3v, Ac=3v, fm=5500Hz, fc#100MHz, -0, =0 a. s(t) 3[1+1.08 cos(2nS500t)] cos(2100E6t) b.s(t) 301+1cos(25500t)] cos(2T100E6t) C.s(t) 301+6.5 cos(2rB500t)] cos(2r1 00t) d. s(t) 6.51+0.93 cos(2T100t)] cos(2t100E3t)