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Chapter 8 Optical Spectrum Measurement
OSA optical spectrum analyzer Setup
Alarms
When
Channel Detection
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 top right of the screen. If all 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".
Thresholds can then be set (using the direction keys or numeric keypad), to global level
or to the level of each channel:
1
Global alarms
Number of channels
Delta channel power
Delta OSNR
Composite power
2
Channel alarms
Max channel offset
Min. channel power
Max. channel power
Min. OSNR
Channel Number
Channel value
Delta F / Delta WL
9
P Min.
1.Max. acceptable variation between max. power and min. power on all channels
2.Max. acceptable variation between max. SNR and min. SNR on all channels
3.Maximum composite power
4.Wavelength drift. Selection of the alarm on the basis of the value of delta F
5.The values are then defined in Min. P
6.The values are then defined in Max. P
7.The values are then defined in Min. SNR
8.Delta of frequency or wavelength
9.Minimum power
258
is positioned on Grid, it is possible to activate an alarm
.
Yes/No
1
No or threshold modifiable from 0.1 to 60 dB
2
No or threshold modifiable from 0.1 to 60 dB
3
No or threshold modifiable from -59.9 dBm to +20 dBm
4
No/Freq/Wavelen.
5
Yes/No
6
Yes/No
7
Yes/No
From «001» to the max. number of channels.
Display of the wavelength of the channel number selected
8
From 0 to 2 THz (2 THz is the default value) or from 0 to 8 nm.
The unit depends on the value of the parameter Max channel
offset
From -80 dBm to +9.9 dBm (below max. threshold)
User Manual
78000010220 Rev. 024
appears at
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Troubleshooting
