A block diagram had been given for the implementation of hardware, a mathematical model had been established for the acquisition system,and a mathematic expression had been derived using the state transfer function for the average acquisition time.

• 给出了系统硬件实现的原理框图；建立了系统的数学模型；采用状态转移函数推导了系统平均捕获时间的计算表达式.