Allen-Bradley Rockwell Automation 1734-AENT Manual de usuario Pagina 211

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Publication ENET-UM001I-EN-P - January 2010 211
Fiber Cable and LC Connector Appendix B
In the example shown here, the channel insertion loss is calculated for an optical channel based on the
following factors:
1 dB/km fiber
0.75 dB per adapter
Note that in this example, the end connectors are not factored in the calculations.
The maximum power budget for this example is 12.8 dB for 62.5/125 um fiber. Therefore, the channel
insertion loss for the exa
mple of 3.5 dB is less than the maximum power budget.
Fiber 1 dB/km Fiber 1 dB/kmFiber 1 dB/km
0.75 dB0.75 dB
1km0.75km 0.25km
0.75 dB 0.75 dB 0.75dB 0.25 dB1 dB
++++
Total channel insertion loss = 3.5 db
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