This is the MCQs in Analog Transmission from the book Data Communications and Networking 4th Edition by Behrouz A. Forouzan. More: http://www.pinoybix...
Compilation of all the quizzes (MCQs) for each and every chapters in the book of Data Communications and Networking 4th Edition by Behrouz A. Forouzan. 1|Page MCQs in Analog Transmission www.PinoyBIX.org
1. In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant A) PSK B) ASK C) FSK D) QAM 2. How many carrier frequencies are used in BPSK? A) 0 B) 1 C) 2 D) none of the above 3. The constellation diagram of 16-QAM has ______ dots. A) 4 B) 8 C) 16 D) none of the above 4. AM and FM are examples of ________ ______ __ conversion. A) analog-to-analog B) digital-to-digital C) analog-to-digital D) digital-to-analog 5. The Federal Communications Commission (FCC) allows ______ kHz for each FM station. A) 20 B) 100 C) 200 D) none of the above 6. Analog-to-analog conversion is needed if the available bandwidth is _______. A) band-pass B) low-pass
C) either (a) or (b) D) neither (a) nor (b) 7. In _____ transmission, the frequency of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal. The peak amplitude and phase of the carrier signal remain constant, but as the amplitude of the information signal changes, the frequency of the carrier changes correspondingly. A) AM B) FM C) PM D) none of the above 8. How many carrier frequencies are used in QPSK? A) 0 B) 2 C) 1 D) none of the above 9. Which of the following is not a digitalto-analog conversion? A) FSK B) ASK C) AM D) PSK 10. _______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data. A) Analog-to-analog B) Digital-to-digital C) Digital-to-analog D) Analog-to-digital 11. If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps. A) 100 2|Page
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B) 400 C) 800 D) 1600 12. In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. A) PSK B) FSK C) ASK D) QAM 13. Which of the following is not an analog-to-analog conversion? A) QAM B) AM C) PM D) FM 14. How many carrier frequencies are used in BASK? A) 0 B) 1 C) 2 D) none of the above 15. Quadrature amplitude modulation (QAM) is a combination of ___________. A) PSK and FSK B) ASK and FSK C) ASK and PSK D) none of the above 16. In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant. A) ASK B) FSK C) PSK D) QAM
17. If the bit rate for an ASK signal is 1200 bps, the baud rate is ________. A) 1200 B) 600 C) 400 D) 300 18. The constellation diagram of BPSK has ______ dots. A) 0 B) 1 C) 2 D) none of the above 19. The constellation diagram of QPSK has ______ dots. A) 4 B) 2 C) 1 D) none of the above 20. In _______, the peak amplitude of one signal level is 0; the other is the same as the amplitude of the carrier frequency. A) OOK B) PSK C) FSK D) none of the above 21. If the bit rate for a 16-QAM signal is 4000 bps, what is the baud rate? A) 1200 B) 1000 C) 400 D) 300 22. ASK, PSK, FSK, and QAM are examples of ________ conversion. A) analog-to-analog B) digital-to-digital C) analog-to-digital D) digital-to-analog
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23. If the bit rate for an FSK signal is 1200 bps, the baud rate is ________. A) 1200 B) 600 C) 400 D) 300 24. The constellation diagram of BASK has ______ dots. A) 0 B) 1 C) 2 D) none of the above 25. The Federal Communications Commission (FCC) allows ______kHz for each AM station. A) 20 B) 10 C) 5 D) none of the above 26. How many carrier frequencies are used in BFSK? A) 2 B) 1 C) 0 D) none of the above 27. In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal. A) AM B) FM C) PM D) none of the above 28. _________ conversion is the representation of analog information by an analog signal. A) Analog-to-analog B) Digital-to-digital
C) Analog-to-digital D) Digital-to-analog 29. In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal. A) PM B) FM C) AM D) none of the above 30. In QAM, both ________ of a carrier frequency are varied. A) phase and frequency B) amplitude and phase C) frequency and amplitude D) none of the above 31. ________ uses two carriers, one inphase and the other quadrature. A) QAM B) ASK C) FSK D) PSK 32. Given an AM radio signal with a bandwidth of 10 KHz and the highestfrequency component at 705 KHz, what is the frequency of the carrier signal? A) 710 KHz B) 705 KHz C) 700 KHz D) Cannot be determined from given information 33. A constellation diagram shows us the __________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature). A) amplitude and frequency B) amplitude and phase 4|Page
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C) frequency and phase D) none of the above 34. If the baud rate for a 64-QAM signal is 2000, what is the bit rate? A) 12000 B) 1000 C) 400 D) 300
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