When comparing two absolute power values, what can a wireless engineer conclude after calculating a result of -3 dB?

IT Questions BankCategory: CCNPWhen comparing two absolute power values, what can a wireless engineer conclude after calculating a result of -3 dB?
When comparing two absolute power values, what can a wireless engineer conclude after calculating a result of -3 dB? 1ITExamAnswers Staff asked 1 month ago
When comparing two absolute power values, what can a wireless engineer conclude after calculating a result of -3 dB?

  • The power level of interest is one tenth of the reference value.
  • The power level of interest is half the reference value.
  • The power level of interest is ten times the reference value.
  • The value of the two power levels is the same.
  • The power level of interest is double the reference value.

Explanation: According to the dB laws:
Law of 0: If two power levels are the same, one is 0 dB greater than the other.
Law of 3s: A value of 3 dB means that the power value of interest is double the reference value. A value of -3 dB means that the power value of interest is half the reference value.
Law of 10s: A value of 10 dB means that the power level of interest is 10 times the reference value. A value of -10 dB means that the power level of interest is 1/10th of the reference value.

More Questions: Chapters 17 – 19: Wireless Essentials Exam


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