EXFO FastReporter 2 - Manual (Page 275)

Working with iOLM files
Post Processing Software 265
Matching Link Elements Without a Reference
Matching Link Elements Without a Reference
When multiple measurements are selected, the elements from different
measurements are matched according to their position (the position of the
elements can be slightly different). The application uses a algorithm with
tolerances to match these elements. For more information of setting the
tolerance, see Modifying iOLM Settings (FR2-FC Mode) on page 219.
When no reference measurement is selected, all elements of the first
measurement are considered as the reference elements. In the remaining
traces, if some elements are not matching, they are also included as
reference elements.
Matching is always done from left to right in accordance with the element
location. If elements are present before the link start (A), the matching will
be done from right to left.