
The CHROMOS 11 is a portable test instrument designed to provide accurate in-system chromatic dispersion measurement. It allows transmission system suppliers and operators to measure the total end-to-end dispersion of both repeaterless and line-amplified systems with the minimum of disruption. Chromatic dispersion and also PMD at any wavelength in the C or L bands can be measured accurately enabling the performance of 10 and 40Gbit/s WDM systems to be predicted and optimised.