EXFO FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 - Manual (Page 140)

Setting Up the Instrument in Drift Mode
134 FTB-5230S/-OCA
Setting Up Acquisition Parameters
2. Select the acquisition type.
3. If you are performing an averaging type acquisition, enter the number
of scans the unit will perform.
Note: You cannot modify the number of scans count value if you are performing a
single acquisition.
4. Select the wavelength range for your acquisition.
You can select the wavelength range by entering the start and stop values
or by selecting a range on the double slider.
To select the wavelength range using the double slider, move the left and
right handles on the double slider or simply click on any band.
Note: You can select more than one adjoining ranges to include in your range, for
example, S + C.