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< PART – B Software >
B-89
IM 39J06B40-01EN 14th Edition: May 30, 2022
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Using the execution result of differential loss measurement
Select [Measurement] and specify the following parameters for differential loss
measurement.
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Specifying the Near End
- Distance Of W To P1
Specify the near end P1 (by its distance from the switch exit position W) as a value
from 0.0 [m] to 50000.0 [m] in units of 0.1 [m].
- Averaging Distance
Specify the near-end averaging distance (distance in meters centered at the near
end to be used for correction) as a value from 5.0 [m] to 20.0 [m] in units of 0.1 [m].
●
Specifying the Far End
Select whether to specify the far end P2 as a (forward) distance from the switch
position W (Distance Of W to P2) or as a (reverse) distance from the sensor optical
fiber end E (Distance Of E To P2).
- Distance Of W To P2
To specify the far end P2 as a (forward) distance from the switch position W, select
[Distance Of W To P2], and specify a value from 0.0 [m] to 50000.0 [m] in units of
0.1 [m].
- Distance Of E To P2
To specify the far end P2 as a (reverse) distance from the sensor optical fiber end E,
select [Distance Of E To P2], and specify a value from 0.0 [m] to 50000.0 [m] in
units of 0.1 [m].
- Averaging Distance
Specify the far-end averaging distance (distance in meters centered at the far end to
be used for correction) as a value from 5.0 [m] to 20.0 [m] in units of 0.1 [m]
Tip
- The temperatures at the specified near-end and far-end positions must be the same.
- If continuous sequence mode is selected, differential loss is averaged over the repeated
measurements. This improves the accuracy especially for the far-end where signal-to-raise ratio is
poor.