Troubleshooting Preparations; Digital Multimeter; Optical Power Meter - Huawei EchoLife HG861 Manual

EchoLife HG861 GPON Terminal

5.2 Troubleshooting Preparations

This topic describes the tools, namely, digital multimeter and optical power meter to be prepared
before troubleshooting.

5.2.1 Digital Multimeter

This topic describes the appearance, functions, and usage instructions of the digital multimeter.

5.2.2 Optical Power Meter

This topic describes the appearance, functions, and usage instructions of the optical power meter.
5.2.1 Digital Multimeter
This topic describes the appearance, functions, and usage instructions of the digital multimeter.
A digital multimeter is a simple test meter that is used frequently in the electrotechnical and
electronic industries. It is inexpensive, convenient to take, and easy to use, and has complete
functions.
Basically, the digital multimeter is used to measure the resistance, DC voltage, AC voltage,
current, capacitance, diode, and triode.
The procedure is as follows:
1.
2.
3.
4.
5.
6.
5.2.2 Optical Power Meter
This topic describes the appearance, functions, and usage instructions of the optical power meter.
An optical power meter, a necessary test meter in the test of the optical fiber communication
system, is mainly used to measure the optical power of various wavelengths in measurement
points of the optical fiber link. Optical power indicates the energy of the light in a measurement
point of the optical fiber link, which is an important index in the optical fiber network. When
the optical power is smaller than a certain value, the optical receive end cannot detect optical
signals, that is, the optical receive end cannot receive signals sent from the transmit end. In
conclusion, mastering the usage of the optical power meter is very important.
The following takes the optical power meter used by the GPON ONT development team as an
example to describe how to use the optical power meter. The model of this optical power meter
manufactured by EXFO is PPM-350B. The usage of other special PON optical power meters is
similar to the usage of the PPM-350B optical power meter.
The PPM-350B optical power meter is an optical power measurement meter designed by EXFO
for measuring the optical power of various wavelengths, including 1310 nm, 1490 nm, and 1550
nm in the GPON.
Issue 01 (2009-07-30)
Turn of the power supply.
Select the functions to be tested. (When a digital multimeter that does not have a dedicated
power switch, combine step 1 and step 2.)
Choose a proper range.
Perform the measurement correctly.
(Optional) Press the button for maintaining the current value unchanged.
Read the measurement value.
Figure 5-2
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shows the apperance of the PPM-350B.
5 Troubleshooting
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