间隔触发：这种类型让你去搜寻两个相同极性、被一指定时间间隔分离的连续边界。
Interval: This type lets you search for two successive edges of the same polarity that are separated by a specified interval of time.
你选择好想要触发的边缘极性，像脉宽触发那样设置好时间范围。
You choose what polarity of edge you wish to trigger off of, and like Pulse-Width trigger you set your time ranges.
它由与输入控制电压同步的触发器控制四模拟开关阵列的开关转换来选择输出极性。
Its output polarity is determined by the four analog switch array controlled by an input-synchronized trigger.
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