13
OTDR Test Settings
Fiber Menu Settings
The Fiber menu allows selecting the Fiber Type parameter between Default and User:
• Default - SMF-28e - sets the default Index (Group Index of Refraction) and BC (Backscatter
Coefficient) values to those of SMF-28e type fiber
• User - allows entering user selectable Index (Group Index of Refraction) and BC (Backscatter
Coefficient) values
Note:
Using the Default Index and BC values is generally recommended.
Enter the User Index and BC values only if you know the specifications of the particular fiber
you are testing and these specifications are significantly different from the default SMF-28e
numbers.
To Set Fiber Parameters
1. From the Main menu, use keys to display the Fiber page.
2. From the displayed Fiber page, use keys to highlight the desired parameter.
3. Use keys to change the highlighted parameter.
To Set Events
1. From the Main menu, use keys to display the Event page.
2. From the displayed Event page, use keys to highlight the desired parameter.
3. Use keys to change the highlighted parameter.
Events Auto
Thresholds User
End Loss, dB 3.0
Event Loss, dB 0.79
Event Reflectance -50.0
Test EventFiber Cables
FilesUSB Trace
Press ‘Test’ to start test
Expert
Expert
Use Left/Right arrow key to
display the desired option.
Use Left /Right arrow key to
change highlighted parameter.
Use Left /Right arrow key
to toggle Default and User
options.
Use Left /Right arrow key to
change highlighted parameter.
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