EXFO FTB-5800 Chromatic Dispersion Analyzer for FTB-500 - Manual (Page 35)

Operating Your Chromatic Dispersion Analyzer
Chromatic Dispersion Analyzer 29
Performing Reference Measurements
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.