Decibelm W Nasıl Hesaplanır?
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Converts between power ratios and decibel scale for audio, RF, and other applications. Logarithmic scale matches human perception.
Formül
dBm = 10 × log10(P ÷ 0.001)
- P
- P value — Variable used in the calculation
Adım Adım Kılavuz
- 1dBm = 10 × log10(P ÷ 0.001)
- 2dBW = 10 × log10(P)
- 3Reverse: power (watts) = 10^(dBm ÷ 10) ÷ 1000
- 4Every 3 dB ≈ 2× power
- 5Every 10 dB ≈ 10× power
Çözümlü Örnekler
Giriş
Power 1W
Sonuç
30 dBm
Kaçınılması Gereken Yaygın Hatalar
- ✕Confusing dBm (power) with dBV (voltage) with dBu (relative to 0.775V)
- ✕Adding dBm values instead of multiplying power
Sık sorulan sorular
Why use decibels instead of watts?
Logarithmic scale compresses large ranges (1W to 1MW becomes 30 dBm to 60 dBm), easier comparison.
What's typical dBm for audio and RF?
Audio -20 to +4 dBu typical; WiFi transmit +17 to +30 dBm; cellular -30 to +33 dBm.
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