Abstract:The recording data of the receiver at a certain moment and a certain position have a certain dynamic range of temporal frequency,and when the later is less than the dynamic range of acquisition receiver and apparatus,we can record both strong and weak frequency information.When dynamic range of temporal frequency of data are wider than dynamic range of acquisition receiver and apparatus,we can only record frequency information with strong amplitude. In order to overcome this problem,the prefilter of apparatus is generally used to attenuate frequency signal with strong energy,reduce dynamic range of temporal frequency of data so that the capacity of recording weak signal can be achieved.On the other hand,we can also increase in number of recording bits of seismic apparatus to increase in temporal recording dynamic range of apparatus in order to overcome the problem.The time-frequency and frequency-time statistic analysis have been done in the paper.It is known from this analysis that different signal frequency can result in wide difference in dynamic range of temporal frequency,so that correct using prefilter parameters of apparatus are very important in field acquisition.