EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 228)

Analyzing Traces with the Bidirectional Analysis Application
214 FTB-7000 Series
Viewing Results
Information specific to the A->B or B->A trace is also displayed:
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Range: Acquisition range.
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Duration: Duration of the acquisition.
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Span ORL: ORL calculated either between the span start and the span
end, or on the total fiber span, depending on the option you have
selected in the Setup window.
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High resolution: Indicates whether or not the acquisitions were
performed using the high-resolution feature.
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IOR: Index of refraction of the displayed trace.
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Backscatter: Rayleigh backscatter coefficient of the displayed trace.
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Helix factor: Helix factor setting of the displayed trace.
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Splice loss detection: Splice loss threshold for detecting small
non-reflective events during trace analysis.
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Reflectance detection: Reflectance threshold for detecting small
reflective events during trace analysis.
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End-of-fiber detection: End-of-fiber threshold for detecting important
event loss, which could compromise signal transmission, during trace
analysis.