Communication System 2(TTA)

25 Questions | Attempts: 303
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    Which of the following is not a digital-to-analog conversion

    • ASK
    • PSK
    • FSK
    • AM
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INSTRUCTIONS
1. NUMBER OF QUESTIONS 25
2. HAS A TIME LIMIT OF 15 MINUTES
3. HAS A PASS MARKS OF 30%
4. QUESTIONS PER PAGE 1
5. EACH QUESTIONS HAS 1 MARKS
6. NEGATIVE MARKING FOR EACH QUESTIONS IS 0.25
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8. WILL ALLOW TO YOU PRINT OUT YOUR RESULT AND CERTIFICATE
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10. WE WILL PROVIDE YOURS RESULT,CERTIFICATE AND YOUR RESPONSE SHEET TO YOURS EMAIL ID AT END OF ONLINE TEST
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Communication System 2(TTA) - Quiz

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  • 2. 

    In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal

    • AM

    • PM

    • FM

    • none of the above

    Correct Answer
    A. AM
  • 3. 

    Which of the following is not an analog-to-analog conversion?

    • AM

    • FM

    • PM

    • QAM

    Correct Answer
    A. QAM
  • 4. 

    _________ conversion is the representation of analog information by an analog signal.

    • Digital to analog

    • analog to analog

    • analog to digital

    • Digital to digital

    Correct Answer
    A. analog to analog
  • 5. 

    In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant

    • ASK

    • PSK

    • FSK

    • QAM

    Correct Answer
    A. FSK
  • 6. 

    The constellation diagram of BPSK has ______ dots

    • 2

    • 1

    • 0

    • None

    Correct Answer
    A. 2
  • 7. 

    In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant

    • ASK

    • PSK

    • FSK

    • QAM

    Correct Answer
    A. ASK
  • 8. 

    In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant

    • ASK

    • PSK

    • FSK

    • QAM

    Correct Answer
    A. PSK
  • 9. 

    FCC stands for

    • Federal communication commission

    • frequency communication commission

    • Fourier communication commission

    • none of the above

    Correct Answer
    A. Federal communication commission
  • 10. 

    Quadrature amplitude modulation (QAM) is a combination of ____

    • ASK and FSK

    • ASK and PSK

    • PSK and FSK

    • none of the above

    Correct Answer
    A. ASK and PSK
  • 11. 

    ________ uses two carriers, one in-phase and the other quadrature

    • A) ASK

    • PSK

    • FSK

    • QAM

    Correct Answer
    A. QAM
  • 12. 

    If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps

    • 100

    • 400

    • 800

    • 1600

    Correct Answer
    A. 800
  • 13. 

    A constellation diagram shows us the __________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature)

    • amplitude and phase

    • Amplitude and frequency

    • frequency and phase

    • None of the above

    Correct Answer
    A. amplitude and phase
  • 14. 

    How many carrier frequencies are used in BFSK

    • 2

    • 1

    • 0

    • NONE

    Correct Answer
    A. 2
  • 15. 

    The constellation diagram of BASK has ______ dots.

    • 2

    • 1

    • 0

    • None

    Correct Answer
    A. 2
  • 16. 

    How many carrier frequencies are used in BASK

    • 2

    • 1

    • 0

    • NONE

    Correct Answer
    A. 1
  • 17. 

    How many carrier frequencies are used in QPSK

    • 2

    • 1

    • 0

    • None

    Correct Answer
    A. 2
  • 18. 

    In _______, the peak amplitude of one signal level is 0; the other is the same as the amplitude of the carrier frequency

    • PSK

    • OOK

    • FSK

    • NONE

    Correct Answer
    A. OOK
  • 19. 

    How many carrier frequencies are used in BPSK

    • 2

    • 1

    • 0

    • None

    Correct Answer
    A. 1
  • 20. 

    Given an AM radio signal with a bandwidth of 10 KHz and the highest-frequency component at 705 KHz, what is the frequency of the carrier signal?

    • 700 KHz

    • 705 KHz

    • 710 KHz

    • Cannot be determined from given info

    Correct Answer
    A. 700 KHz
  • 21. 

    If the bit rate for an FSK signal is 1200 bps, the baud rate is

    • 300

    • 400

    • 600

    • 1200

    Correct Answer
    A. 1200
  • 22. 

    If the bit rate for an ASK signal is 1200 bps, the baud rate is

    • 300

    • 400

    • 600

    • 1200

    Correct Answer
    A. 1200
  • 23. 

    Analog-to-analog conversion is needed if the available bandwidth is _______.

    • low pass

    • Band pass

    • Both

    • None

    Correct Answer
    A. Band pass
  • 24. 

    _______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data

    • digital to analog

    • Analog to analog

    • Analog to digital

    • Digital to digital

    Correct Answer
    A. digital to analog
  • 25. 

    In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal

    • AM

    • PM

    • FM

    • NONE OF ABOVE

    Correct Answer
    A. AM

Quiz Review Timeline (Updated): Mar 17, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 17, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 04, 2016
    Quiz Created by
    Harish.hot04
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