EXFO OTDR 2 - Manual (Page 104)

Analyzing Traces and Events
96 OTDR
Summary Tab
Summary Tab
For each wavelength, the summary tab gives the span loss, the span ORL
values, and the global status of the results:

pass: no results exceed the thresholds

fail: at least one result exceeds the thresholds

unknown: no threshold is configured or a span value (length, loss,
ORL) is not available
The span length (distance between span start and span end) is also
displayed, except if a continuous fiber is detected for all wavelengths.
Note: In the summary tab, you can tap to display the current trace only.
When the current trace is displayed (main or reference trace), you can also
switch from one wavelength to another. When the current trace is not
displayed, all wavelengths appear.