 - dimensional Markov process generated when a Markov step signal
 - dimensional Markov process generated when a Markov step signal  is the input to an
 is the input to an  -order system of the form
 -order system of the form  . As examples, the joint probability densities of input and output are found for a symmetric three-level signal smoothed by an RC low-pass filter, and partial results are obtained for a doubly integrated Rice telegraph signal.
 . As examples, the joint probability densities of input and output are found for a symmetric three-level signal smoothed by an RC low-pass filter, and partial results are obtained for a doubly integrated Rice telegraph signal.