EXFO FTB-5700 Single Ended Dispersion Analyzer for FTB-500 - Manual (Page 30)

Setting Up the Single-Ended Dispersion Analyzer
24 FTB-5700
Setting PMD and CD Acquisition Parameters
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.