EXFO OTDR 2 - Manual (Page 97)

Analyzing the Results Manually
OTDR 89
Getting Event Loss and Maximum Reflectance
5. Position marker B at the beginning of the linear area following the
event to be measured.
6. Position submarker b at the end of the linear area following the event
to be measured (must not include any significant events).
Note: For non-reflective events, will be displayed.
4
3
5
6
Event to be measured
Linear area
Linear area
Four-point event loss
from the areas delimited
by markers
a, A, B and b
Maximum
reflectance