EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 186)

Analyzing Traces and Events
172 OTDR
Analyzing the Fiber on a Specific Fiber Span
Analyzing the Fiber on a Specific Fiber Span
Note: This function is available in Advanced mode only.
If you want to focus your fiber analysis on a specific fiber span, you can
define events (new or existing) as a span start and/or span end. You can
even define a fiber span for short fibers by placing the span start and the
span end on the same event.
Note: You can set a default span start and end, which will be applied during the
first analysis performed upon trace acquisition. Once the span is set, you
can set the start and end data as default values.
To set a fiber span:
1. From the main window, select the Graph tab, and press the Span
button.
2. Select Span Start or Span End depending on the type of span event
you want to create.
3. Define the span event location by moving marker A along the trace
using one of the following methods:
³
Drag marker A to the desired span event location.
³
Enter a distance value in the Position box.
³
Use the single-arrow buttons to move marker A on the trace.