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EXFO FTB-7000 OTDR for FTB-200 v2 User Manual

Page 154

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Analyzing Traces and Events

140

FTB-7000 Series

Modifying Events

3. Position marker A on the event, and submarker a (to the left of

marker A) as far as possible from marker A , without including the
preceding event.

The area between markers A and a must not include any significant
variation. For more information on positioning markers, see Using
Markers
on page 165.

4. Position marker B after the end of the event, where the trace returns to

a regular loss inside the fiber, and submarker b (to the right of
marker B), as far as possible from marker B, without including the
following event.

The area between markers B and b must not include any significant
variation. For more information on positioning markers, see Using
Markers
on page 165.

Event loss and reflectance are displayed, respectively, in the Loss and
Reflectance boxes.

Marker A

Marker B

Loss and reflectance

values