1.1 Intent The object of this test procedure is to measure the jitter transfer characteristic of an individual digital equipment as the ratio of the output jitter to the applied input jitter as a function of frequency. 1.2 Specification Jitter transfer requirements are specified in terms of jitter templates, which cover a specified gain/frequency region. Such requirements are intended to ensure that clock recovery circuits and desynchronizer phase smoothing circuits adequately attenuate jitter. If the relationship between the jitter appearing at the input and output ports of a digital equipment can be described in terms of a linear process (both additive and homogeneous), then a narrowband measurement will characterize its jitter transfer performance and the term "jitter transfer function" is used.