The Ando AQ6315B optical spectrum analyzer brings advanced capabilities to a wide range of applications, from light source evaluation to measurement of loss wavelength characteristics in optical devices. Featuring significant upgrades from the basic performance and functions of the prior AQ6312B model, they incorporate a totally new monochrometer design. In spite of the compact case, they support single -pass/double – pass monochrometer mode select. In the double pass monochrometer mode dynamic range is improved far beyond what it has even been before. In the single -pass monochrometer mode it supports the same wide range of applications as the prior models. This Analyzer analysis functions for WDM and other optical devices (LD, LED, FBG, etc.).