Figure 4-4
Measurement interface of the optical power meter
Optical channel loss is the total insertion loss caused by optical fibers, optical splitters, optical
fiber connectors, and fiber connection points.
shows the estimation of optical channel
loss in the engineering design.
Table 4-4
Optical loss parameters in engineering
Item
Average Loss (dB)
Connection
point
Connector
0.3
Mechanical
splicing
0.2
Fusion splicing
0.1
Optical splitter
1:64
19.7
1:32
16.5
1:16
13.5
1:8
10.5
1:4
7.2
1:2
3.2
Optical fiber (G.
652)
1310 nm (1 km) 0.35
1490 nm (1 km) 0.25
Optical channel loss = L x a + n1 x b + n2 x c + n3 x d + e + f (dB)
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
4 Maintenance and Troubleshooting
Issue 04 (2011-01-12)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-9