Jinsi ya kukokotoa Decibelm W
Decibelm W ni nini?
Converts between power ratios and decibel scale for audio, RF, and other applications. Logarithmic scale matches human perception.
Fomula
dBm = 10 × log10(P ÷ 0.001)
- P
- P value — Variable used in the calculation
Mwongozo wa Hatua kwa Hatua
- 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
Mifano Iliyotatuliwa
Ingizo
Power 1W
Matokeo
30 dBm
Makosa ya Kawaida ya Kuepuka
- ✕Confusing dBm (power) with dBV (voltage) with dBu (relative to 0.775V)
- ✕Adding dBm values instead of multiplying power
Maswali yanayoulizwa mara kwa mara
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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