Diffraction-grating spectrum analyzer (OSA) for analyzing optical spectra in the 600 to 1750 nm wavelength band. -90 dBm guaranteed optical reception sensitivity. Tracking with tunable laser source. Optical pulse measurement. Full range of WDM application functions. The MS9710B is targeted for installation, commissioning and maintenance of 100 GHz and 200 GHz DWDM systems. Internal 3.5-inch floppy disk drive and thermal printer.