CWNP
CWISA-103 · Question #3
What metric is used to express a relative increase or decrease in signal strength?
The correct answer is C. dB. Decibel (dB): A logarithmic unit expressing ratios of power or signal strength. It's used in RF contexts due to the wide range of signal levels encountered. dBm: Decibels relative to one milliwatt (power measurement). dBi: Decibels relative to an isotropic antenna (antenna gain).
Wireless IoT Technologies and Protocols
Question
What metric is used to express a relative increase or decrease in signal strength?
Options
- AW
- BdBm
- CdB
- DmW
How the community answered
(50 responses)- A6% (3)
- B4% (2)
- C80% (40)
- D10% (5)
Explanation
Decibel (dB): A logarithmic unit expressing ratios of power or signal strength. It's used in RF contexts due to the wide range of signal levels encountered. dBm: Decibels relative to one milliwatt (power measurement). dBi: Decibels relative to an isotropic antenna (antenna gain).
Topics
#dB#signal strength#RF measurements#wireless metrics
Community Discussion
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