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为了提高测震系统的时间服务精度,《地震台站观测规范》规定:“时间服务以均匀时UTC为基准”.并且要尽可能采用自动对时,但是用以往地震仪中的自动对时装置,往往达不到规范的要求,原因有以下几方面:(以DF—1—2放大器为例).1.放大器对收音机中各音频信号无选择能力.收音机中各种信号经整流滤波以后都可反映在图面上.2.收音机质量差异很大,信噪比保证不了.收音条件的好坏,影响也很大.3.UTC信号不象中央台6响信号那样规则,很难把某个整时信号画在图面上.
In order to improve the time service accuracy of the seismometer system, the Seismic Station Observations Specification stipulates that “the time service should be based on a uniform UTC”, and automatic timing should be adopted as much as possible. However, , Often do not meet the requirements of norms, for the following reasons: (DF-1-2 amplifier, for example) .1 amplifier on the audio signal in the radio without the ability to select all the signals in the radio by the rectifier filter Can be reflected in the picture .2. The radio quality is very different, the signal-to-noise ratio can not guarantee the radio conditions are good or bad, the impact is also great .3 signal is not like the Central Taiwan 6 ring signal rules, it is difficult to a A whole time signal painted on the surface.