Exfo FTB-5500B PMD Analyzer Instrukcja Użytkownika Strona 99

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Troubleshooting
Polarization Mode Dispersion Analyzer 91
Solving Common Problems
Specifications not
guaranteed, retesting
recommended.
The PMD value might no be
within the unit’s
specification:
³ Your PMD Analyzer
measures low PMD
values from a weak
coupling device (for
example, PMF) and
analyzer input
polarization state is not
appropriate.
³ External parasitic signal
during measurement
(for example, live fiber).
³ Move fiber or device
slightly to change
polarization state and
retest.
³ Remove parasitic signal
and retest.
Message Possible cause Solution
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