Cara Menghitung Decibelm W
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Converts between power ratios and decibel scale for audio, RF, and other applications. Logarithmic scale matches human perception.
Rumus
dBm = 10 × log10(P ÷ 0.001)
- P
- P value — Variable used in the calculation
Panduan Langkah demi Langkah
- 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
Contoh Terpecahkan
Masukan
Power 1W
Hasil
30 dBm
Kesalahan Umum yang Harus Dihindari
- ✕Confusing dBm (power) with dBV (voltage) with dBu (relative to 0.775V)
- ✕Adding dBm values instead of multiplying power
Pertanyaan yang sering diajukan
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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