EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) User Manual
Page 290
Managing Results
282
FTB-5240S/5240BP
Managing WDM Test Results
The graph will also display the noise level for a channel with a doted line
under the selected peak. The width of the noise level indicator shall be set
according to the current Noise for OSNR setting.
³
If Noise for OSNR is IEC, then the width of the noise level indicator will
be equal to the full width of the channel.
³
If Noise for OSNR is InB, then the width of the noise level indicator will
be 50 GHz or the full width of the channel, whichever is the narrowest.
³
If Noise for OSNR is InB nf, then the width of the noise level indicator
will be 25 GHz or the full width of the channel, whichever is the
narrowest.
You can also perform the following on your graph:
³
Move markers on the graph.
³
Use zoom functions to zoom on specific areas or peaks of the graph.
Note: For more information on these, see Markers Tab on page 285 and Using
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