成都遥测台网数字化记录的仪器响应

Instrument Response for Digital Recording of Chengdu Telemetry Seismic Network

本文利用标定信号的数字记录和模拟记录，参考已有的模拟记录的幅频特性，计算求得了成都遥测台网（CTSN）数字记录系统的仪器响应，其幅频特性曲线的形态与模拟记录的大致相同，而高于10Hz时，随机干扰成分较大，因此处理这套系统的数据时，应尽量选取低于10Hz的信号。

In this paper, using the digital and analog recordings of calibration signals, referring to the known amplitude characteristics of analog recording, we calculated and obtained the instrument response for digital recording system of Chengdu Telemetry Seismic Network (CTSN). Although there are some randon disturbance at high frequency (more than 10 Hz), the amplitude characteristics of digital recording are similar to those of analog recording. Therefore to process the digital recordings, it is more accurate to select the signals with frequency less than 10 Hz to avoid the effect of random disturbance.