milliwatts (mW) go decibel-milliwatts (dBm) , áireamhán tiontaithe cumhachta .
Iontráil an chumhacht i mW agus brúigh an cnaipe Tiontaigh :
áireamhán tiontaithe dBm go mW ►
Tá an chumhacht P (dBm) i dBm cothrom le 10 n-uaire logarithm bonn 10 na cumhachta P (mW) i milleavatts (mW) arna roinnt ar 1 milliwatt (mW):
P (dBm) = 10 ⋅ log 10 ( P (mW) / 1mW)
Mar sin,
1mW = 0dBm
Tiontaigh 20mW go dBm :,
P (dBm) = 10 ⋅ log 10 (20mW / 1mW) = 13.0103dBm
| Cumhacht (mW) | Cumhacht (dBm) |
|---|---|
| 0 + mW | -∞ dBm |
| 0.01 mW | -20 dBm |
| 0.1 mW | -10 dBm |
| 1 mW | 0 dBm |
| 2 mW | 3.0103 dBm |
| 3 mW | 4.7712 dBm |
| 4 mW | 6.0206 dBm |
| 5 mW | 6.9897 dBm |
| 6 mW | 7.7815 dBm |
| 7 mW | 8.4510 dBm |
| 8 mW | 9.0309 dBm |
| 9 mW | 9.5424 dBm |
| 10 mW | 10 dBm |
| 100 mW | 20 dBm |
| 1000 mW | 30 dBm |
| 10000 mW | 40 dBm |
| 100000 mW | 50 dBm |
| 1000000 mW | 60 dBm |
| 10000000 mW | 70 dBm |
| 100000000 mW | 80 dBm |
| 1000000000 mW | 90 dBm |
| 10000000000 mW | 100 dBm |
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