EXFO FTV-700 series, Руководство пользователя

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Testing Fibers in Advanced Mode
OTDR
53
Setting a Default Span Start and Span End
To change the default span start and span end for traces:
1.
From the button bar, press OTDR Setup .
2. From the
OTDR Setup
window, go to the
Analysis
tab.
3. If you want to set the span start and end with a distance value, under
Span start
and
Span end
, select
Set by distance
.
Go to the Position box and enter the desired value, using the distance
units displayed to the right of the field.
Under Span end , indicate whether the span end position is from the
fiber span start or from the end of the fiber.
OR
If you want to set the span start and end on a particular event, under
Span start and Span end , select Set on event .
From the Event number field, use the up or down arrow to select the
number of the event that you want to designate as span start or span
end.
The span event parameters are applied to all newly acquired traces.