Operation Manual

Managing Test Results
OTDR 57
Using Zoom Controls
Using Zoom Controls
As soon as you select one of the zoom controls to change the scale of the
graph, a magnifying glass icon appears. When the scale changes, the trace
is always centered on the area surrounding the magnifying glass icon.
You can let the unit automatically adjust the zoom on the currently selected
event or zoom in on or out of the graph using manual zoom. You can also
return to the original graph scale.
Note: If you want the application to automatically zoom on the defined fiber
span, see Setting General OTDR Parameters on page 23.
Note: If you do not see the zoom controls on your unit, they are probably hidden
(see Setting General OTDR Parameters on page 23).
To automatically zoom in on the selected event:
1. Press Menu, select OTDR, and then press Select.
2. Use the left/right function arrows until you see Trace, and then display
the pane (F1/F2 key).
3. Press Select to zoom in. Press Select one more time to go to the second
level of zoom.
You can switch between the two levels of zoom by pressing Select as
needed.