With an advanced monochromator, faster electrical circuits, and noise reduction techniques, the AQ6370 series achieves fast measurement speed even when measuring a steep spectrum from DFB-LD or DWDM signals, or when measuring a low power signal from a broadband light source. The AQ6373 and AQ6375 can cover the entire wavelength range from 350nm through 2400nm. With the sharper spectral characteristics of the monochromator, spectral signals in close proximity can be separated. The AQ6370E is ideal for both telecom and datacom applications including DWDM system validation, high-speed transceiver testing, and laser characterization, while remaining flexible for general-purpose optical measurements. Its unique free-space input design enables seamless testing of single-mode. Thank you for purchasing the AQ6370D Optical Spectrum Analyzer. To improve ease of use, it includes mouse-based user operation and a brand-new zoom function. Thirteen built-in analysis functions and seven trace calculations for popular applications can be utilized with a simple function key The. Yokogawa's AQ6370 OSA Series can satisfy the specific test and measurement needs of R&D and manufacturing centers belonging to any Industry.