Figure 5-2
Appearance of the PPM-350B
According to , the differences between the PPM-350B optical power meter and common optical
power meters are that the PPM-350B optical power meter has a downstream input optical port
and an upstream input optical port, and can display the optical power of three wavelengths, that
is, 1310 nm, 1490 nm, and 1550 nm.
shows the common measurement points.
Figure 5-3
Schematic diagram of measurement points of optical power in the GPON
Field engineers should also know the indexes related to light on the ONT side, such as the
maximum input optical power of the 1490 nm wavelength, minimum output optical power of
the 1310-nm wavelength, and receive sensitivity of the 1490 nm wavelength.
lists related indexes.
Table 5-2
Indexes related to the light on the GPON ONT side
Parameter Type
Wavelength (nm)
Unit
MIN
MAX
Upstream data
1310
dB
+0.5
+5
5 Troubleshooting
EchoLife HG861 GPON Terminal
5-6
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 01 (2009-07-30)
