Jitter Due to Pulse Stuffing Synchronization

Expressions for calculating the magnitudes and frequencies of jitter components due to the pulse stuffing process are derived by means of a Fourier transform of the pulse stuffing jitter waveform (PSJW) for the cases where the housekeeping bit does and does not affect the stuffed positions. Previously, the latter case has always been assumed. The difference between the two cases is a function of the multiplex format, the number of cells in the synchronizer store and the type of phase detector used. The effect of the housekeeping bit is to increase the number of jitter components in the frequency domain and the store size requirement for waiting time jitter. With a reasonably low desynchronizer bandwidth, the desynchronizer output jitter can be smaller than in the ideal case previously considered.