Exfo FTB-5800 Chromatic Dispersion Analyzer for FTB-400 Manual de usuario descargar pdf (Pagina 34)

Operating Your Chromatic Dispersion Analyzer

28 FTB-5800

Performing Reference Measurements

IMPORTANT

To ensure the best possible results, EXFO recommends performing

reference measurements for wavelength and for chromatic

dispersion. Furthermore, you must perform a wavelength reference

BEFORE performing the chromatic dispersion reference.

Skipping wavelength reference may lead to inaccurate results. You

cannot perform both references in a single step.

Reference

type

Recommended reference

frequency

Remarks

Wavelength Before each test session

and every time the

application recommends it.

³ Adjusts the source wavelength precisely.

³ The application will advise you to take a

wavelength reference whenever the

need arises (after selecting a different

source type, after module initialization,

after a certain period of time or when

temperature varies), but never during

acquisitions.

When references are necessary, a

message will appear in the status bar,

recommending a new reference.

Chromatic

dispersion

Once every month and

every time the source or

patchcord is changed.

³ Used to cancel out source, analyzer and

patchcord dispersion.

It will be taken according to the sources

you have selected

(C-source; C-reference).

³ Important for low-chromatic-dispersion

measurement.

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Exfo FTB-5800 Chromatic Dispersion Analyzer for FTB-400 Manual de usuario Pagina 34