The ONA 600 Optical Network Analyzer is a powerful and versatile tool for characterisation of optical fibers and networks. The system consists of a mainframe, plug-in modules for measurement of Chromatic Dispersion, Polarization Mode Dispersion and Spectral Attenuation with a full range of optical light sources. Designed to deliver superior performance in a field environment, the advanced modular design reduces costs and ensures ultimate flexibility in testing next generation networks.