Exfo FTB-5600 Distributed PMD Analyzer Manuel d'utilisateur Page 128

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Optimizing Measurements
122 FTB-5600
Use a Larger Number of SOPs and Wavelengths
Use a Larger Number of SOPs and Wavelengths
This will ensure that the instrument can access close to a maximum
available wavelength number from the instrument. More SOPs can also
improve the measurement accuracy for RMS DGD in the available
wavelength range.
A maximum wavelength range and as many SOPs as possible for the
acquisition will reduce the uncertainty of a measurement (that is, to
achieve a minimum measurement uncertainty).
Note: At least 100 or 200 SOPs should be used for obtaining a meaningful
cumulative PMD curve as a function of distance, and more SOPs. For
example, 500 to 1000, is recommended in order to make a better and
clearer picture of cumulative PMD.
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