当输入信号进入数字式存储示波器时，通过A/D转换器将输入端的信号转换成相应的数字并存入存储器，该过程在采样时基电路的控制下不断地循环进行，而这时仪器的触发电路不断监测输入信号，看控制电路是否出现触发状态，一旦触发条件满足，则采样过程中断，处理器通过对存储器内采样数据的处理和显示，即可在屏幕上重现信号电压与时间的关系，也就是信号电压波形。-When the input signal into the digital storage oscilloscope, via A/D converter input signal is converted into a corresponding digital and stored in the memory, the process is under the control of the base circuit is constantly sampling cycle, and then the instrument trigger circuit continuously monitors the input signal, the control circuit to see whether there is a trigger status, once the trigger condition is met, the sampling process is interrupted, the memory of the processor by sampling data processing and display, can be reproduced on-screen signal voltage versus time relationship, that is, the signal voltage waveform.