Stability of p.c.m.-oscillator synchronisation systems with sampled error signals

Previous analyses of control-system stability have approximated the p.c.m. synchronisation system to a continuous linear model. The digital nature of the equipment indicates that a sampled model is more appropriate, and it is shown that, with this model, the system gains have to be reduced. A comparison between `continuous¿ and `sampled¿ stability criteria is made.