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End-to-end Summary Page
End-to-end Summary Page Features (ORL Upgrade Required)
If the ORL Upgrade option is installed, the end-to-end Summary is always generated if testing in
the [Full Auto] or [End Locate] modes. The end-to-end Summary is also generated in the [Expert]
test mode if Auto event generation is enabled.
The end-to-end Summary displays the following information:
• End-to-end Length in user-selected distance units.
• End-to-end Link Loss in dB.
• Optical Return Loss (ORL) in dB.
For most accurate results, use Launch & Receive cables
• Loss and ORL include first and last connector of fiber-under-test when Launch & Receive
cables are used.
• Receive cable properly terminates open far-end connector.
• If no receive cable is used, open PC connector at far-end will cause poor (low) ORL.
• ORL displayed as < nn.nn if fiber-under-test includes a saturated (clipped) reflection.
• ORL < 30 dB generally indicates presence of one or more strong reflections.
• ORL < 20 dB indicates likely air gap at connector, break, or open PC end.
CABLE000_001
Link Length
Link Loss
Link ORL
1.5234 km
1.461 dB
38.2 dB
1310 1550
WAVE
dB
i
OFL250
OTDR
Receive fiber
indicated by
green region.
Large reflection
at open end of
receive cable is
excluded from
ORL.
Loss & ORL excludes reflection
and backscatter from launch
& receive cables, as well as
excess reflection from open
end at far-end of receive cable.
Loss & ORL include
first and last
connection to fiber-
under-test.
Summary displays end-to-end
Link Length, Loss and ORL.
Launch fiber
indicated by
yellow region.
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