EXFO FTB-5800 Chromatic Dispersion Analyzer for FTB-400 - Manual (Page 21)

Setting Up Your Chromatic Dispersion Analyzer
Chromatic Dispersion Analyzer 15
Setting the Wavelength Step
To set the wavelength step using the custom option:
1. In the Parameters tab, set the Step dial to Custom.
2. Enter the desired value in the Step box. The value must be between
0.1 nm and the wavelength range you chose previously.
Moreover, the final measurement point, may not correspond to the
upper limit of the wavelength range if the wavelength span
is not an integer value of
A warning message will indicate if your step is too small or too large.
λmax λmin –
λ Δ