Clock regenerator high quality, synchronization network and method for the detection of deviations within a synchronization network having

摘要

A process for the detection of frequency deviations of a guide clock signal of a guide clock signal transmitter (prc) within a synchronization network, in particular a sdh - network, wherein at least one clock regenerator of high quality (hqc), which in a synchronization chain (i, iii) with at least a preceding clock regenerator of lower quality (lqc), which in the synchronization chain (i, iii) to the guidance clock signal generator (prc) is connected, wherein the values of the clock regenerators (hqc, lqc) in synchronism with the frequency of the guide clock signal of the guide clock signal transmitter (prc) can be adjusted, in that, on an incoming clock signal with the aid of at least of a phase-locked loop (pll), preferably two phase-locked loops (pll), which in each case have an oscillator (vco), and this synchronized clock signal is synchronized to the next clock regenerator is passed on, with at least a long-term average of the manipulated variable of the controlled oscillator (vco) within the clock regenerator of high quality (hqc) is automatically determined and the temporal change in this long time average value is evaluated, in that the time change of the long time average value with a reference value (3) is compared.