Exfo FastReporter 2 Manual de usuario descargar pdf (Pagina 149)

100

101

Working with OTDR Files

Post Processing Software 139

Managing Markers

Various options of the Manual Measurement table are described below.

Option Description

4 points

event loss

In the 4 points event loss, four markers (a, A, b, and B) are visible. This

least square approximation method is used to fit a straight line to the

backscatter data within the two regions defined by markers a, A and b,

B, that is over the regions to the left and to the right of the event

bordered by markers A and B, respectively.

A-B LSA loss This loss of event bordered by the markers A and B is obtained by fitting

a straight line to the backscatter data between these two markers.

2 points

section

attenuation

In the 2 points section attenuation, two markers (A and B) are visible.

This measurement gives the reduction in Rayleigh backscatter level as

a function of distance (always expressed in dB/km to follow the

standards of the fiber-optic industry) between two selected points.

Only those two points are used to perform the calculation and there is

no averaging.

A-B LSA

attenuation

This LSA attenuation is obtained by fitting a straight line between two

points in the backscatter data between markers A and B.

A-B ORL This displays the ORL between markers A and B.

3 points

reflectance

In the 3 points reflectance, three markers (a, A, and B) are visible. This

measurement displays the reflectance pointed by marker a, A, and B.

3 points

maximum

reflectance

This measurement displays maximum reflectance for the selected

event.

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