大多数开关主机都可通过触发输入进行外部触发，并且在继电器触点稳定之后可输出一个触发脉冲。
Most switch mainframes can be triggered externally via the trigger input and can send an output trigger pulse when the relay contacts have settled.
当主控门打开时，经过转换的输入信号脉冲通过它进入计数寄存器，并在此统计，然后通过显示电路输出。
While the main gate is open, the conditioned input signal pulses are passed through to the counting register, where they are tallied and then scaled for output by the display circuitry.
通过比较输入与输出信号脉冲波形和眼图发现，随着传输速率和传输距离的增加输出信号劣化。
It shows that the signal will become bad with the increase of transmission velocity and distance by comparing the wave figure and eye diagram of input and output pulse.
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