EXFO FTB -5240S/5240BP Optical Spectrum Analyzer - Manual (Page 14)

Safety Information
8 FTB-5240S/S-P/BP
Your instrument is a Class 1 laser product in compliance with standards
IEC 60825-1: 2007 and 21 CFR 1040.10, except for deviations pursuant to
Laser Notice No. 50, dated June 24, 2007. Invisible laser radiation may be
encountered at the output port.
The following label indicates that a product contains a Class 1 source:
The maximum input power for the FTB-5240S/S-P/BP Optical Spectrum
Analyzer is
4 W for S and S-P modules, and 6 W for BP modules. For
more information on equipment ratings, refer to the user documentation
for your platform.