EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 307)

Managing Results
OSA 301
Managing EDFA Test Results
When the acquisition is taken (see Starting a Measurement on page 237 for
details on how to perform a test), the trace will be displayed in the EDFA
Graph tab with information along the following axis values:

X axis: wavelength in nm or frequency in THz

Y axis: optical power expressed in dBm, as measured in the optical
resolution bandwidth (RBW) of the OSA. This reference RBW is shown
in the graph.
If the current trace was previously saved, the graph will display the file
name of the current trace in the title bar.
The graph will display peak indicators for all the channels found by the
application with a red vertical line over the peaks to indicate the peak
position.
A blue horizontal bar ( ) will be displayed on the top of a channel if it
does not overlap with another channel. If the channel overlaps with
another channel, the horizontal bar will be yellow (
).