Measurement of jitter in digital communications signals

摘要

Measurement of jitter in a digital communications signal is accomplished by generating multiple successive samples representative of jitter in a digital communications signal and supplying the successive samples in parallel to several (e.g. five) high-pass filter functions to generate filtered samples. The filtered samples from each high-pass filter function are passed to a respective measurement function, for measurement of parameters of the filtered samples from the corresponding high-pass filter function. The parameters include jitter peak amplitude and jitter RMS amplitude. Parameter measurements provided by the measurement functions are selected according to the measurement bandwidth(s) required for the jitter measurement, and a measurement of jitter in the communications signal is derived from those parameter measurements. Measurement of jitter in digital communications signals