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

  • The value of the two power levels is the same.
  • The power level of interest is double 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 power level of interest is one tenth of the reference value.
Explanation & Hint:

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.

For more Questions and Answers:

CCNPv8 ENCOR (Version 8.0) – Chapters 17 – 19: Wireless Essentials Exam Answers Full 100%