EXFO OTDR 2 - Manual (Page 91)

OTDR 83
6 Analyzing the Results
Manually
You can move markers and zoom in on or out of any event or trace
segment to measure splice loss, fiber section attenuation, reflectance, and
optical return loss. It is possible to do this once a trace has been acquired
or opened, or even when an acquisition is in progress.
Using Markers
You can use markers to view the position and relative loss or reflectance of
an event.
Markers are available from the Events tab (when you modify an event) or
the Measure tab (when you add an event) in the main window.
You can lock or unlock the distance between the four markers and move
them as a block. You can lock or unlock the distance between the A and a
marker pair, as well as the B and b marker pair and move them. You can
also lock a, A, b, B markers and move them as a group.
To move a marker directly from the graph:
1. Ensure that the
button is selected in the zoom button bar.
2. Select the marker directly on the trace display and drag it to the desired
position.
Distance between
span start and B
Distance between A
and B
Distance between
span start and A
Power at A
Power at B
Power difference
between A and B
Marker not selected
Marker selected
Average loss
between A and B