aonad cumhachta leictreachais i ndeicibeilí (dB) is ea dBm nó decibel-milliwatt , agus tagairt dó do 1 milliwatt (mW).
Tá an chumhacht i milliúitíní deicibeil ( P (dBm) ) cothrom le 10 n-uaire logarithm bonn 10 den chumhacht i milliúit ( P (mW) ):
P (dBm) = 10 ⋅ log 10 ( P (mW) / 1mW)
Tá an chumhacht i milleavatts ( P (mW) ) cothrom le 1mW huaire 10 arna ardú ag an gcumhacht i milliúidí deicibeil ( P (dBm) ) arna roinnt ar 10:
P (mW) = 1mW ⋅ 10 ( P (dBm) / 10)
Tá 1 milliwatt cothrom le 0 dBm:
1mW = 0dBm
Tá 1 bhata cothrom le 30dBm:
1W = 1000mW = 30dBm
Tiontaigh milliwatts decibel go milliwatts, watts, decibel-watts.
Iontráil an chumhacht i gceann de na boscaí téacs agus brúigh an cnaipe Tiontaigh :
Conas cumhacht i milleavatts (mW) a thiontú go dBm.
Tá an chumhacht i dBm cothrom le logarithm bonn 10 na cumhachta i milleavata (mW):
P (dBm) = 10 ⋅ log 10 ( P (mW) / 1mW)
Mar shampla: cad é an chumhacht i dBm do thomhaltas cumhachta 100mW?
Réiteach:
P (dBm) = 10 ⋅ log 10 (100mW / 1mW) = 20dBm
Conas cumhacht i dBm a thiontú go milliúillí (mW).
Tá an chumhacht i milliúit ( P (mW) ) cothrom le 10 arna ardú ag an gcumhacht i dBm ( P (dBm) ) arna roinnt ar 10?
P (mW) = 1mW ⋅ 10 ( P (dBm) / 10)
Mar shampla: cad é an chumhacht i milleavatts le haghaidh tomhaltas cumhachta 20dBm?
Réiteach:
P (mW) = 1mW ⋅ 10 (20dBm / 10) = 100mW
Conas cumhacht i vata (W) a thiontú go dBm.
Tá an chumhacht i dBm cothrom le logarithm bonn 10 na cumhachta i vata (W) móide 30dB:
P (dBm) = 10 ⋅ log 10 ( P (W) / 1W) + 30
Mar shampla: cad é an chumhacht i dBm do thomhaltas cumhachta 100W?
Réiteach:
P (dBm) = 10 ⋅ log 10 (100W / 1W ) + 30 = 50dBm
Conas cumhacht i dBm a thiontú go vata (W).
Tá an chumhacht in vata ( P (W) ) cothrom le 10 arna ardú ag an gcumhacht i dBm ( P (dBm) ) lúide 30dB arna roinnt ar 10:
P (W) = 1W ⋅ 10 ( ( P (dBm) - 30) / 10)
Mar shampla: cad é an chumhacht i vata do thomhaltas cumhachta 40dBm?
Réiteach:
P (W) = 1W ⋅ 10 ((40dBm - 30) / 10) = 10W
Conas cumhacht i dBW a thiontú go dBm.
Tá an chumhacht i dBm cothrom le logarithm bonn 10 na cumhachta i vata (W):
P (dBm) = P (dBW) + 30
Mar shampla: cad é an chumhacht i dBm do thomhaltas cumhachta 20dBW?
Réiteach:
P (dBm) = 20dBW + 30 = 50dBm
Conas cumhacht i dBm a thiontú go dBW.
Tá an chumhacht i dBW ( P (dBW) ) cothrom le 10 arna ardú ag an gcumhacht i dBm ( P (dBm) ) arna roinnt ar 10:
P (dBW) = P (dBm) - 30
Mar shampla: cad é an chumhacht i vata do thomhaltas cumhachta 40dBm?
Réiteach:
P (dBW) = 40dBm - 30 = 10dBW
Is aonad coibhneasta é dB a chuireann síos ar ghnóthachan agus is aonad iomlán é dBm dá dtagraítear do 1 milliwatt (mW).
Mar sin ní féidir leat dB a thiontú go dBm.
| Cumhacht (dBm) | Cumhacht (dBW) | Cumhacht (bhata) | Cumhacht (mW) |
|---|---|---|---|
| -100 dBm | -130 dBW | 0.1 pW | 0.0000000001 mW |
| -90 dBm | -120 dBW | 1 pW | 0.000000001 mW |
| -80 dBm | -110 dBW | 10 pW | 0.00000001 mW |
| -70 dBm | -100 dBW | 100 pW | 0.0000001 mW |
| -60 dBm | -90 dBW | 1 nW | 0.000001 mW |
| -50 dBm | -80 dBW | 10 nW | 0.00001 mW |
| -40 dBm | -70 dBW | 100 nW | 0.0001 mW |
| -30 dBm | -60 dBW | 1 μW | 0.001 mW |
| -20 dBm | -50 dBW | 10 μW | 0.01 mW |
| -10 dBm | -40 dBW | 100 μW | 0.1 mW |
| -1 dBm | -31 dBW | 794 μW | 0.794 mW |
| 0 dBm | -30 dBW | 1.000 mW | 1.000 mW |
| 1 dBm | -29 dBW | 1.259 mW | 1.259 mW |
| 10 dBm | -20 dBW | 10 mW | 10 mW |
| 20 dBm | -10 dBW | 100 mW | 100 mW |
| 30 dBm | 0 dBW | 1 W. | 1000 mW |
| 40 dBm | 10 dBW | 10 W. | 10000 mW |
| 50 dBm | 20 dBW | 100 W. | 100000 mW |
| 60 dBm | 30 dBW | 1 kW | 1000000 mW |
| 70 dBm | 40 dBW | 10 kW | 10000000 mW |
| 80 dBm | 50 dBW | 100 kW | 100000000 mW |
| 90 dBm | 60 dBW | 1 MW | 1000000000 mW |
| 100 dBm | 70 dBW | 10 MW | 10000000000 mW |
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