Jitter testing technique and results at VC-4 desynchronizer output of SDH equipment

Specifications relative to jitter and wander generation, at the output of desynchronizer systems, represent one of the hottest topics in characterizing SDH equipment. Among the many factors involved, pointer adjustments, due to phase deviations between the received timing signal and the SDH equipment internal clock, play indeed a primary role in phase noise accumulation. This paper deals with two different kinds of test designed for measuring-from 0 Hz on-phase transients due to AU pointer adjustments, namely: static and dynamic jitter measurement configuration. Moreover, results obtained by applying this technique to different suppliers' equipment are herein presented.<
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