428XL仪器时钟频率的测试及分析方法

Testing and analysis methods for 428XL instrument clock frequency

以前,除了早期模拟仪器时代进行过仪器时钟频率的检测以外,进入数字仪器时代以后,多年的地震仪器检测项目中是没有这项的。近年来,地震勘探要求的勘探精度越来越高,对地震数据精细处理和解释的要求也越来越高,因此再次提出要求测试地震仪器的时钟频率。428XL仪器操作手册要求每年都要对仪器的时钟频率进行测试和校准,同时越来越多的甲方也要求地震承包商必须完成这项测试。由于相关客户以前很少甚至没有进行过这项测试,所以大家对此知之甚少。本文根据仪器厂家和相关甲方指导,介绍了使用频率计和信号发生器测试428XL仪器时钟频率的方法,并给出了分析测试数据的方法。

There is no clock frequency detection item for years of digital seismic instruments. In recent years, seismic ex- ploration requires increasingly high precision for data acquisition, processing and interpretation, then the test item of clock frequency seismic is brought out. 428XL instrument user manual requires the LCI clock of instrument must be tested and corrected every year. At the same time, more and more seismic clients tend to request their contractors to follow the manual requirements. Because many Sercel users seldom did this test and never required to do this testing task. So they know little about the test. In this paper, two methods are introduced and analyzed referring to the directions from Sercel Company and the relevant clients.