EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 317)

Managing Results
OSA 311
Managing Markers
Managing Markers
You can use markers to perform manual measurements and verification
directly on the trace. All test modes feature two vertical markers and two
horizontal markers. The vertical markers are used to indicate the power
level on the trace at the wavelength or frequency it is positioned, and the
horizontal markers are used for indicating power at the level they are. You
can measure actual power and wavelength values of any point on the trace
using the vertical markers.
Note: Horizontal markers will be displayed only if the markers are activated in
the Preferences tab of the related test mode.
Each marker is identified by a letter: A and B are for vertical markers, and C
and D for horizontal markers.
The application allows you to fix the distance between the markers. When
this feature is activated, while moving any one marker, both markers will
move at the same rate and distance.
Markers A and B in the marker toolbar act as toggle buttons to enable
selection. When a marker is activated, the color of the button changes to
orange and the selected marker displays a double arrow at the base of the
marker in the graph tab, which means that the marker can be moved.
At this point, if you select the other vertical marker in the graph tab, the
selection of the toggle switches to this marker. However, if you select the
other marker button from the marker toolbar, both markers will be
selected and the distance between both will be locked.
Note: If you select a vertical marker while the horizontal markers are active, the
selection will toggle to the other type of marker and vice versa.
Note: If you zoom into the graph, or pan within it, the markers remain in their set
positions.