Equipment In Specification Knowledge Check

10 Questions | Total Attempts: 63

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Knowledge Quizzes & Trivia

Questions and Answers
  • 1. 
    The minimum SNR for QAM 256 is:
  • 2. 
    The minimum upstream power level is ___dBmv
  • 3. 
    What is the maximum and minimum digital signal power levels at the input of a device  for QAM 256 is? (Select one answer)
    • A. 

      +8 to +2 dBmv

    • B. 

      +6 to -4 dBmv

    • C. 

      +10 to -6dBmv

    • D. 

      +8 to -2 dBmv

    • E. 

      +6 to +2 dBmv

  • 4. 
    What is the maximum  permissible slope between two QAM 256 frequencies at the input to equipment?
    • A. 

      +/-4dB

    • B. 

      +/-8dB

    • C. 

      +/-3dB

    • D. 

      +/-10dB

    • E. 

      +/- 6dB

    • F. 

      +/- 0dB

  • 5. 
    The maximum upstream (return path) power level is? (Select one answer)
    • A. 

      55dBmv

    • B. 

      54dBmv

    • C. 

      51dBmv

    • D. 

      53dBmv

    • E. 

      52dBmv

    • F. 

      49dBmv

  • 6. 
    What is the maximum and minimum signal input levels  at a device for QAM 64?
    • A. 

      +3 to -3dBmv

    • B. 

      +55 to - 11dBmv

    • C. 

      +10 to -6dBmv

    • D. 

      +5 to - 11dBmv

    • E. 

      +6 to -8dBmv

    • F. 

      +4 to - 10dBmv

  • 7. 
    What is the minimum acceptable SNR for a QAM 64 frequency? 
  • 8. 
    Calculate the slope between the following QAM 256 frequencies.Remember to indicate if the slope is positive or negative by using a - or + sign before the number. Your High digital frequency is measured at +2dBmv and your Low frequency at +6dBmv 
  • 9. 
    Calculate the slope between these two QAM 256 frequencies. Remember to put a - or + in-front of your answer to indicate if the slope is negative or positive.The high digital frequency level is -5dBmv and the low digital frequency is +2dBmv
  • 10. 
    Calculate the expected signal loss using the following information.
    • Length of drop cable = 180 metres
    • Frequency loss per 10metres = 2dB
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