EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 199)

OTDR 185
10 Analyzing the Results
Manually
Once a trace has been acquired or opened, you can use markers and
zoom in on or out of any event or trace segment to measure splice loss,
fiber section attenuation, reflectance, and optical return loss.
Selecting the Attenuation and Loss Values that
Will Be Displayed
By default, in the Measure tab, the application only displays the values
obtained by using the same measurement methods as the analysis, that is
the four-point event loss and the A-B LSA attenuation.
Note: This function is available in Advanced mode only.
You can display the values corresponding to the following measurement
methods:
³
For loss:
³
Four-point event loss
³
A-B LSA (Least-Square Approximation) loss
³
For attenuation:
³
Two-point section attenuation
³
A-B LSA (Least-Square Approximation) attenuation
Note: You must select at least one measurement method for loss value and one
measurement method for attenuation value.