Using the Rule of 10s and 3s for quick dBm-to-mW conversions, to what value in...

The Rule of 10s and 3s provides a fast approximation for converting logarithmic dBm values into absolute power in milliwatts. A 10 dB increase multiplies power by ten, while a 3 dB increase approximately doubles it. Start with the standard reference of 20 dBm = 100 mW. Because 17 dBm is 3 dB below 20 dBm, the power is approximately halved: 100 mW ÷ 2 = 50 mW. Therefore, 17 dBm corresponds to approximately 50 mW. The exact mathematical value is about 50.1 mW, so option C is also accurate beyond the quick approximation. RUCKUS technical specifications routinely express transmit and receive power in dBm while antenna gain is specified separately in dBi, making these conversions fundamental to RF planning and troubleshooting. RUCKUS Networks

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