Define dBm and explain how to convert a dBm value to milliwatts.

Define dBm and explain how to convert a dBm value to milliwatts.

• A. dBm is a unit of distance; P(mW) = 10^(dBm/10).
• B. dBm is 10 log10(P/1 mW); P(mW) = 10^(dBm/10).
• C. dBm is P in milliwatts; P(mW) = dBm.
• D. dBm is a polarisation state.

Answer: (B)