The Advantest Q8384 with option 25 is a high end optical spectrum analyzer, performance-optimized for the DWDM test market.
　　* Wavelength Range 600 to 1700nm
　　* 10pm Resolution Bandwidth
　　* +-20 pm Wavelength Accuracy (opt. 25)
　　* 50 dB Dynamic Range at +-0.1nm,60 dB at +-0.2nm
　　* Characterization of DWDM Signals Spaced 50GHz or Less
　　* Multitude of WDM Analysis Features
　　* Accurate NF Measurements of EDFAs
　　* Handles Power Levels up to +23 dBm
　　* Gated Measurements for Loop Testing
　　* Reliable Measurements on Passive Optical Components