YOKOGAWA DTSXL, Руководство пользователя, Страница: 171 / 289

< PART – B Software >
B-88
IM 39J06B40-01EN 14th Edition: May 30, 2022
B7.3.2. Double-ended Measurement Settings
As measurement results of the forward and reverse directions are combined in double-
ended measurement, loss correction is not required. However, absolute temperatures
must still be corrected for the total differential loss between the Stokes and anti-Stokes
light over the full fiber length.
Double-ended measurement settings are used for calculating the total differential loss
between the Stokes and anti-Stokes light over the full fiber length.
You can select either to use a known differential loss value or use the execution result of
differential loss measurement.

Using a known differential loss
Select [Setting] and enter the differential loss.
- Differential Loss
Enter the total differential loss between the Stokes and anti-Stokes signals over the
full fiber length as a value from -9.999 [dB/km] to 9.999 [dB/km] in units of 0.001
[dB/km].
Tip
- We recommend using the default value of 0.220 [dB/km] for Differential Loss.
- Specify 0.000 [dB/km] for Differential Loss to perform no correction.