Viavi COSA-4055 User Manual page 17

Grid name
ITU standard
First ITU channel
(with display in nm)
Channel spacing
Number of
channels
Define channels
Alarms
None Conventional ITU CWDM
– –
– –
– –
– –
– –
– –
NOTE
The maximum real number of channels for ITU grids depends on the
value selected for the first channel and the spacing between the
channels.
NOTE
It is possible to display the grid with the View Grid softkey. A table
appears showing the channel number, the name of the channel, the
reference wavelength and the alarm thresholds for delta frequency,
minimum power and maximum power.
When Channel Selection
an alarm system. This system is based on a system of thresholds. Any
measurement results that exceed these thresholds are displayed in red
in the table, and the icon
the results are within the thresholds (no result is in red), the icon
becomes .
 To activate the alarm system, go to the Alarms line and select
Active.
MTS / T-BERD 5800 • COSA-4055 • User Manual 2016.01
Chapter 1 Optical Spectrum Measurement
Editable
G.694.2
Editable, from 1271 to 1611 nm,
by increments of 20 nm
20 nm
Editable, from 1 to 19 by
increments of 1
Sub-menu accessible to display the
wavelengths of each channel, name the band,
and name each channel.
is positioned on Grid, it is possible to activate
appears at the top right of the screen. If all
Configuration
Manual
Editable
N/A
N/A
N/A
Editable from
1 to 256
15