Channel Detection Threshold; Display Of A Grid - Viavi 8100 V2 Series User Manual

Chapter 8 Optical Spectrum Measurement
Trace display functions
Table: display of the table alone
Figure 141 OSA Results - Table

Channel detection threshold

On the trace, some peaks corresponding to noise could be mistaken for
channels. It is therefore necessary to fix a power threshold level: only
peaks that exceed this threshold will be considered as channels and
included in the table of results.
To display or modify this threshold, press the S
threshold. Modify the value to position it on

Display of a grid

The display window of the trace can include a grid to facilitate verification
of the position of the channels. Several grids are possible (see the chapter
"Grid" on page
1.The "Auto" value is obtained by continuing to reduce the value of the threshold
below the minimum value of -79.9 dBm
300
279)
User Manual
ETUP
Auto
78000010220 Rev. 023
key, then select
1
or fix a threshold value.
Signal