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Analog vs Digital signals & Imparements

ryo.iwata 10 questions 4.0 (1 rating)

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Questions in this quiz (10)

  1. 1The power we use at home has a frequency of 60Hz. The period of this sine wave can be written as follows:
    1. A16.6s
    2. B16.6ms
    3. CData not sufficient
    4. D0.0166us
  2. 2A periodic signal has a bandwidth of 20 Hz. The highest frequency is 60 Hz. What is the lowest frequency?
    1. A0 Hz
    2. B30 Hz
    3. C40 Hz
    4. D50 Hz
  3. 3The strength of signals falls off with distance over any transmisison.
    1. AAttenuation
    2. BInterference
  4. 4The course COMP 2140 introduces fundamental concepts related to the digital transmission and reception of information.
    1. ATrue
    2. BFalse
  5. 5Signals can be analog or digital. Analog signals can have an infinite number of values in a range; digital signals can have only a limited number of values.
    1. ATrue
    2. BFalse
  6. 6The values of SNR and SNR(dB) can be calculated as follows:

    SNR = (10,000uW / 1 mW) = 10,000

    The value of SNR (dB) is 30 dB.
    1. ATrue
    2. BFalse
  7. 7Consider the noiseless channel transmitting a signal with four signal levels . The maximum bit rate can be calculated as:
    1. A12,000 Bps
    2. B12,000 kbps
    3. C1200 bps
    4. DNone of the above
  8. 8The loss in a cable is usually defined in decibels per kilometer (dB/km). If the signal at the beginning of a cable with −0.3 dB/km has a power of 2 mW, what is the power of the signal at 5 km in dB?
    1. A+1.5 dB
    2. BLoss of 1.5 dB
    3. C- 1.5 dBm
    4. D+3 dB
  9. 9
    For any transmission event, the received signal will consist of the transmitted signal modified by the various distortion imposed by the transmission system plus additional unwanted signals that are inserted somewhere between transmission or reception. The latter undesired signals are referred to as:
    1. ANoise
    2. BInterference
  10. 10There are three causes of impairments which are:
    1. AAttentuation
    2. BDistortion
    3. CRepeater
    4. DNoise

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Description
Data communication Quiz on Analog vs Digital signals & Imparements, created by ryo.iwata on 27/11/2013.
Author
ryo.iwata
Language
English
Views
99
Rating
4.0 out of 5 · 1 rating
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