Grátis · Redes e infraestrutura de TI
Orçamento de perdas em fibra ótica.
Calcule a perda de uma ligação ótica pelo comprimento, conectores, emendas e divisores, e compare com o orçamento de potência dos transceptores.
An ideal 1:2 splitter costs about 3.5 dB, 1:8 about 10.5 dB, 1:32 about 17.5 dB.
- Total link loss
- 4.9 dB
- Fibre loss
- 3.5 dB
- Connectors, splices, other
- 1.4 dB
- Power budget (Tx min − Rx sensitivity)
- 14 dB
- Worst-case received power
- -10.9 dBm
- Maximum length with this budget
- 27.43 km
IEEE multimode reach (for reference)
| Standard | OM1 | OM2 | OM3 | OM4 |
|---|---|---|---|---|
| 1000BASE-SX | 275 m | 550 m | 550 m | — |
| 10GBASE-SR | 33 m | 82 m | 300 m | 400 m |
| 25GBASE-SR | — | — | 70 m | 100 m |
| 40GBASE-SR4 | — | — | 100 m | 150 m |
| 100GBASE-SR4 | — | — | 70 m | 100 m |
- TIA-568 allows up to 0.5 dB/km for single-mode, 1310 nm cabled fibre, 0.75 dB per connector pair and 0.3 dB per splice; the defaults are typical installed values.
- Take transmitter and receiver values from the transceiver datasheet. Certify the installed link with an optical loss test set (OLTS), and an OTDR to locate events.
Como usar esta ferramenta: Orçamento de perdas em fibra ótica
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Notas técnicas em inglês
Loss budget only: dispersion and modal bandwidth limits are not calculated (see the multimode reach table). Everything is calculated in your browser; nothing is sent or probed on the network.
Loss = length × attenuation + connectors + splices + other. Budget = minimum transmit power − receiver sensitivity. The overload check uses maximum transmit power against the receiver’s maximum input.
10 km of single-mode at 1310 nm with 2 connector pairs and 4 splices loses 4.9 dB; a 14 dB budget leaves 6.1 dB after a 3 dB margin.