EXFO IQS-5320, User Manual, Page: 41 / 177

Setting Up Your Multi-Wavelength Meter
32
IQS-5320
Creating Channels and Channel Lists
Take care to avoid overlapping channels. Two channels are said to overlap
when they contain the same part of the spectrum. For example, when the
lower limit (center – width/2) of a channel centered on 1552.5 nm is
smaller than the upper limit ( width/2) of a channel centered on
1550 nm, the channels overlap.
Note:
If the current spectral units are in nm, a message appears at the bottom of
the
Add Channel window indicating that the wavelength center value will
be taken in the active medium (air or vacuum). EXFO recommends that
you define channel and alarm widths in GHz and not nm, because when
working in frequency, the medium does not need to be specified.
Note: If the current spectral unit is in nm, a message appears at the bottom of the
Add Channel dialog box, indicating that the actual transmission medium
must be considered when entering wavelength values.
Modifying Channels
It is easy to modify the channel list in the MWM test application, like when
your DWDM system is modified to accept more channels or a different ITU
grid, or if you want to change certain parameters of a channel.
To modify a channel listed in the channel list:
1.
Press
Setup
in the toolbar.
2.
Select the Channel tab.
3. Select the channel to modify in the channel list.
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