Measurement of characteristics of broadcast optical networks.

摘要

A technique for analysing sub-carrier multiplexed networks in which a PRBS is applied to a component or components of the network and the resulting signal is analysed. A phase locked loop (18) extracts the PRBS and provides a signal which removes from the test signal the frequency component corresponding to the channel under investigation. The spectral properties of the PRBS enable broadband analysis of an SCM network to be carried out.