Specifications

CHAPTER
6-1
Cisco ONS 15216 EDFA Operation Guide
78-12818-01
6
Troubleshooting
This chapter discusses basic fault investigation and diagnosis (troubleshooting) procedures for the
ONS 15216 EDFA1.
Tools and Equipment
Troubleshooting the ONS 15216 EDFA1 requires the following test equipment and tools:
Troubleshooting Test Equipment:
• Optical power meter
• Optical spectrum analyzer (as needed)
• 1550 nm optical source (as needed)
• DVOM (digital volt Ohm meter)
The Optical Spectrum Analyzer is necessary when individual wavelength levels need to be adjusted. You
can use this tool to equalize the amplitudes of all the wavelengths so that the DWDM multiplexer output
(the input point of the ONS 15216 EDFA1) has all the wavelengths flat across the spectrum. For
example, you can add attenuation to stronger signals to equalize amplitudes. Once the amplitudes were
equalized, you can then test the amplifier.
An external 1550 nm optical source is necessary in the absence of an active channel so that the
ONS 15216 EDFA1 can be energized with an appropriate known input. This enables you to activate and
test both the gain and output power of the amplifier.
Troubleshooting Tools:
• Standard hand tools
• Optical connector cleaner
• A Windows PC running the HyperTerminal program; see Chapter 4, “Provisioning and Monitoring”
for detailed information about HyperTerminal and setting up local serial or remote communication
between a PC and the ONS 15216 EDFA1