and -t ~ Thia poper aims to ehamcterire the mtio indicator cited in [ l ] . The mtio indicator enables the stochastic up and down method with the ability ahowing u m r e the preeiaion of the estimation. So that, waveform reconstruction with jittered data can be conducted in a reliable way. B y studying in detail the stochastic stationary model[2], a computing intensive calculation for the 98% penentile of the stationary distribution ia implemented. The result ehowa that the mtio indicator can be ehameterired as a function of the mte of the convergence of the stationary distribution, and the value of the mtio indicator converges to a eonatant. With this ehamete&ation, mtio indicator can be applied more rigomudy to make highly precise measurement task implementable.