For the relative deep target lay-ers in China, the low-cut filter can be used for compensating the signal attenuation of high frequency and make it a proper instantaneous dynamic range of instrument.

• 针对我国较深的勘探目的层,用较高的低截滤波来补偿深层高频的弱信号,使之装入仪器的瞬时动态范围有独到的作用。