Exfo FTB-5500B PMD Analyzer Manuel d'utilisateur télécharger pdf (Page 114)

Using Third-Party Broadband Light Sources

106 FTB-5500B

Uncertainty Formula

Note: Continuous random I/O-SOP scrambling can also be performed without

any synchronization with the instrument scans. Automatic, polarization

scramblers/controllers running continuously with time are inserted at the

input and output of the DUT (only one of these is not enough). The

bandwidth of the SOP scramblers must be at least a few Hz to ensure very

effective scrambling, and limited to a few kHz in order not to impair the

normal operation of the analyzer.

Note: The rms width of the auto-correlation interferogram, E(τ) is defined as

follows:

Equation 5σ

∫

E τ() τd⋅⋅

E τ() τd⋅

∫

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Exfo FTB-5500B PMD Analyzer Manuel d'utilisateur Page 114