Exfo FTB-5700 Single Ended Dispersion Analyzer for FTB- Manuel d'utilisateur télécharger pdf (Page 30)

Setting Up the Single-Ended Dispersion Analyzer

24 FTB-5700

Setting PMD and CD Acquisition Parameters

Parameters are kept in memory even after turning off the FTB-500.

These parameters include the following:

Parameter Details

CD Fiber Type There are several types of CD fibers. They have a

wavelength range of 1475 nm to 1626 nm, but different

fits.

³ G.652 NDSF (3-term Sellmeier fit)

³ G.653 DSF (quadratic fit)

³ G.655 NZDSF (quadratic fit)

³ G.656 Wideband NZDSF (quadratic fit)

³ Custom (default cubic fit)

Note: The only fiber type with an editable fit is

Custom.

Note: The CD and PMD fiber types are linked,

therefore if you select a fiber type, the

choices available in the other file type list

will change accordingly.

Fit The type of equation applied to measure CD (for

example, quadratic or 3-Term Sellmeier).

Number of

scans

The number of times the module will take measurements

for measuring PMD. A higher scan count will result in

more accurate data, but will take longer to perform.

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Exfo FTB-5700 Single Ended Dispersion Analyzer for FTB- Manuel d'utilisateur Page 30