EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 45)

Optical Spectrum Analyzer 37
5 Setting Up the Instrument in
WDM Mode
Before performing a spectral analysis in the WDM mode, you must set up
your OSA module and the test application with the appropriate parameters,
as explained in this chapter.
Select the WDM test mode as explained in Selecting a Test Mode on
page 18 before setting up the WDM test parameters.
³
The preferences are the result displayed in the graph and tables, as
well as the job information and related comments saved with each file
(See Defining Preferences on page 39 for more details).
³
The analysis parameters include the channel list details, pass-fail
threshold settings and allows you to select the noise and power
calculation methods (See Setting Up WDM Analysis Parameters on
page 58 for more details).
³
The acquisition parameters include the type of measurement you want
to perform and the wavelength range (See Setting Up Acquisition
Parameters on page 99 for more details).
You can set up your unit in different manners, depending on your testing
needs. The four possible ways for WDM mode are preferred, easy, efficient
and post-processing.
³
The preferred way is to use the complete analysis setup parameters
and complete the information in all tables, as explained in Setting Up
WDM Analysis Parameters on page 58. This setup will be used for the
next acquisition.
³
The easiest way to set up the instrument, especially when the operator
does not know in advance what to expect at the input of the OSA is to
use the Discover button. After Discover button has been pressed, a
measurement and analysis will be performed according to the best
setup determined by the instrument and this setup will be used for the
next scan. This is explained in Using the Discover Feature on page 269.