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作为访美观感综述之一,首先介绍了中国国家地震局地震测深考察组一行5人于1981年3月中旬至4月中旬访美概况,本文着重综述了美国可用于地震测深的几种数字磁带仪,并对这些仪器的主要指标、时间服务系统、工作环境等情况作了全面介绍,其中包括动态范围、触发启动方式和控制功能、磁带记录系统、折合到输入端噪音、仪器使用的环境温度、信号的回放处理、时钟精度和稳定性、时间的校准,拾震器的选配,以及数字记录仪的可靠性等方面。
As an overview of the beauty of the visit to the United States, firstly, the author introduced the survey of five people from the seismological sounding team of the State Seismological Bureau in mid-March to mid-April 1981 in the United States. Digital tape recorders, and the main indicators of these instruments, the time service system, the work environment, etc. made a comprehensive introduction, including dynamic range, triggering the start mode and control functions, tape recording system, equivalent to the input noise, the instrument used Ambient temperature, signal processing, clock accuracy and stability, timing calibration, pickup matching, and the reliability of the digital recorder.