EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 362)

Managing Results
354 FTB-5240S/5240BP
Managing Spectral Transmittance Test Results
To define a marker:
1. From the main window, press the Markers tab.
2. Set the marker by entering precise values in the A, B, C, and D boxes.
Vertical markers A and B appears on the graph and the following
values will be displayed in the Markers tab.
³
Input and Output power values corresponding to the wavelength
position of both the markers.
³
wavelength difference between the markers (A-B)
³
power difference in dB between the markers for Input and Output
power values
³
power difference between Output and Input power for both the
markers in dB.
Horizontal markers C and D appears on the graph and the power
difference between the markers (C-D) related to the horizontal
markers will be displayed in the Markers tab.