OTDR Series e-Manual, D07-00-076P-RevC00 Page 69 of 107
Other Parameters
• Auto Zoom Trace: Use this mode to auto scale the viewing window at the end of the
test.
Note: Disable this feature when using Realtime test mode.
The Fiber/Connection Check is set to ON by default. Tap the checkbox to disable.
• Fiber Check: alerts that live traffic detected and disables OTDR laser to prevent service
disruption.
• Connector Check: checks the loss and reflectance of the OTDR’s connection to the
Fiber-Under-Test or launch fiber. Excessive loss (>1.5dB) or poor reflectance (<-35) will
result in a “Bad connection detected” message. User can stop the test and check the
fiber or resume the measurement.
For OTDR with built-in internal launch fiber, (G.657), the OTDR connector insertion loss
will depend on the fiber type connected to the test set. Mismatched fibers can result in
higher panel loss than expected connector loss. Use the Span button to enter fiber
mismatch compensation. Mismatch fibers should not impact Reflectance.
Span Settings
Press the Span button to configure Span settings.
• Span begin: Used to identify where a launch cable ends and test fiber begins. Defines
the start of analysis by distance or event index. This will appear as a large green arrow
pointing right on screen.
If Event #1 is the end of the launch fiber, set the Span Begin Index to “1”.
• Span end: Defines the end of analysis by distance or event index and mark the end of
the test fiber. This will appear as a large green arrow pointing left on screen.
If a launch fiber is used at the far end of the test fiber, set the Span End Index to the
Event # associated to the location where the far end launch fiber starts.
• Include Event Loss: Check if you don’t want to include connector loss in Total loss
summary.
• Compensated Loss (dB): For OTDR with built-in internal launch fiber, (G.657), the
OTDR connector insertion loss will depend on the fiber type connected to the test set.
Mismatched fibers can result in higher panel loss than expected connector loss. Use the
Span button to enter fiber mismatch compensation. Mismatch fibers should not impact
Reflectance.
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