EXFO FTB-5500B PMD Analyzer - Manual (Page 32)

Setting Up the Polarization Mode Dispersion Analyzer
24 FTB-5500B
Setting Acquisition Parameters
Setting Acquisition Parameters
Your FTB-5500B Polarization Mode Dispersion Analyzer allows you to
perform both single and multiple acquisitions on fibers. Regardless of the
type of acquisition you choose, you must define the parameters that will be
taken into account during the measurements. Parameters are kept in
memory even after turning off the FTB-500.
These parameters include:
Parameter Details
Fiber length Parameter compulsory since it will be used for PMD coefficient
calculations. The entered value must be equal to or greater
than 0.001 km (1 m).
Fiber type Must be set to one of the following types:
³
Telecom; also known as strong coupling. If you are working
directly in the field, you will probably use this fiber type.
³
Polarization-Maintaining; also known as weak coupling.
Note: Traces taken with a particular fiber type cannot
be reanalyzed with a different fiber type
afterwards.
Wavelength Must be set to one of the following values:
³
C and L Bands covers the 1460 nm to 1675 nm range.
³
O, C, L Bands covers the 1260 nm to 1675 nm range.
Note: Selecting the O, C, L Bands option will make your
Polarization Mode Dispersion Analyzer slower in
acquiring PMD data.
PMD value and
coefficient thresholds
Will act as a comparison value to determine whether results
are within a specific limit or not.