阶跃信号在地震仪的脉冲标定和检查中获得了广泛应用。
The step calibration signal has been widely used in seismograph calibration and check.
前两种地震仪，它们的运动方程和传递函数已知，传递函数系数可以通过经典的分段标定方法求得。
For the first two kinds the equations of motion and transfer functions are known. The coefficients of the transfer functions are determined by means of classical step-by-step calibration.
现在对于距一标定过的地震仪任何距离处的任何一个地震，都可用一个震级确定之。
Any earthquake at any distance from a calibrated seismograph is nowadays assingned a magnitude.
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