User guide

22
OTDR Fiber Rings
How to Generate a Baseline Trace Using Fiber Rings
Use the Fiber Ring as a launch cable. •
Connect the Fiber Ring between your OTDR and the fiber link under test. This will allow
you to measure the loss of the near-end connection.
Use the Fiber Ring as a receive cable. •
Cconnect the Fiber Ring to the far-end connector of your fiber link under test. This will
allow you measure the loss of the far-end connection.
By using Fiber Rings as both launch and receive cables, as shown in the diagram below, •
you can measure total insertion loss of the fiber link under test.
Example OTDR Test Configuration With Launch And Receive Cables
fiber ring - launch cable
fiber ring connector
OTDR port
fiber ring - receive cable
OTDR
fiber link under test
near-end connection
fusion splice
far-end connection
end of receive cable
1
2
6
3 5 8
7
4
OTDR port
fiber ring - launch cable
near-end connection
fusion splice
1
3
2
4
end of receive cable
far-end connection
fiber link under test
6
8
5
7
fiber ring - receive cable
OTDR Trace Made Using Launch And Receive Cables