
Chapter 11 Optical Network Leveling
Installation and Commissioning Manual
369
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ADVA AG Optical Netw
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ADVA Conf
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Measuring the Network Fiber Attenuation
During provisioning of the NE an estimated network fiber attenuation had to be
used. You need to verify these values and act accordingly. You need a second
person at the remote site.
Procedure
Step 1
Connect a 1550 nm light source to an optical power meter.
Step 2
Turn on equipment.
Step 3
Measure and note the output power of the light source.
Step 4
Turn off the light source and remove the fiber from it.
Step 5
Remove the transmit network fiber from the NE and connect it to the
light source. Do not connect the light source further down the line like
at a patch panel.
Step 6
Connect an optical power meter to the opposite end of the network
fiber where it enters the network receiver.
Step 7
Turn on the light source.
Step 8
Measure and note the received optical power.
CAUTION
(1) Only Service Personnel are allowed to configure a network
laser/amplifier/switch to “Forced On” mode.
(2) The “Forced On” mode is only permitted for testing and
servicing purposes.
(3) Setting a network laser/amplifier/switch to “Forced On” mode
increases the hazard level of the device. The operating
organization is solely responsible for the safety of the end-to-end
system.
(4) Service Personnel must assure that the device is located in an
appropriate area which guarantees that the conditions for an FSP
are potentially met up to Hazard Level 3B.
CAUTION
The organization in charge of installation and/or service must ensure
that:
(1) personnel responsible for installation and service have received
the proper laser safety training.
(2) mandatory access controls and warning signs for particularly
secured and secured areas are in effect.
Hazard
Level 3B
P
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Note
You cannot measure the attenuation of amplified lines. You should
measure each span between optical amplifiers separately.