Abstract
Simulation by using IBIS model become essential to the design forhigh-speed transmission line such as memory bus but there are morethan few cases which is using IBIS model without deep understanding ofdescriptive content of it. For example, the non monotoniccharacteristic issue is modified automatically by several kind oftoday's simulators but usually we can not see the impact of contentsof modification on the signal integrity simulation's result.In this paper, we research that's influential point and report theresults of our study.