EXFO FTB-700 for FTB-1 - Manual (Page 220)

Analyzing Traces with the Bidirectional Analysis Application (Optional)
212 FTB-700 Series
Viewing Results
Information specific to the A->B or B->A trace is also displayed:

Range: Acquisition range.

Duration: Duration of the acquisition.

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.

High resolution: Indicates whether or not the acquisitions were
performed using the high-resolution feature.

IOR: Index of refraction of the displayed trace.

Backscatter: Rayleigh backscatter coefficient of the displayed trace.

Helix factor: Helix factor setting of the displayed trace.

Splice loss detection: Splice loss threshold for detecting small
non-reflective events during trace analysis.

Reflectance detection: Reflectance threshold for detecting small
reflective events during trace analysis.

End-of-fiber detection: End-of-fiber threshold for detecting important
event loss, which could compromise signal transmission, during trace
analysis.