EXFO iOLM - Manual (Page 130)

Managing Results
124 iOLM
Viewing Element and Section Details
Note: If the type of an element is modified, a “*” sign is displayed at the value in
the Type column. When you generate the report the “*”mark is displayed in
the Type column of the report.

Loss (dB): The loss at different wavelengths.

Reflectance (dB): The reflectance at different wavelengths.

Attenuation: If any section is selected in the Link view then the
attenuation value is displayed in the Elements table.
Note: It is possible to underestimate the loss or reflectance value if the noise level
is too high (for instance, after a lot of loss on the link, the noise levels
increase). In that case, it is possible for the signal processing algorithms to
detect an element, and to estimate the loss/reflectance values, but since the
measured signal does not completely clear the noise floor, the loss or
reflectance/Attenuation values are likely to be underestimated. If the loss or
reflectance/Attenuation value is underestimated, the value is displayed
with a > symbol.
Note: If the loss or reflectance value is saturated, that is, the value is displayed
with a > symbol, the value will be tested for Pass/Fail and it will be able to
specify the fail status if the value is fail but it will not be able to specify the
pass status.
For grouped elements, the following information is displayed:

Group Loss: The total loss of the grouped elements.

Group Reflectance: The highest reflectance of the grouped
elements.
Note: When the main screen is split, the first row of the element table displays the
Group Loss and Group Reflectance, and the second displays the loss and
reflectance of the selected element of the group.