VT-VRPA1-151-1X/V0/0
此功能基于外部输入触发器执行单次扫描测量
信号
通过允许扫描触发信号开启，仪器开始单次扫描测量
TTL电平和in负逻辑，以进入位于
仪器
扫描触发输入信号的信号逻辑固定为负逻辑，不能
被改变。
扫描触发信号的脉冲宽度必须为5 ms或更长。
输入扫描触发器时的操作与扫描键的操作相同，或
单键。
扫描触发功能通过在特定周期内轮询来检测扫描触发信号。
因此，输入扫描触发信号后直到扫描开始的时间将在
5 ms的范围。
触发输出<<操作程序见第5.17节>>
此功能从后面板上的触发输出端子输出触发信号
仪器（仅在清扫期间）。

This function performs a single sweep measurement based on an externally input trigger signal. The instrument starts a single sweep measurement by allowing sweep trigger signals on the TTL level and in negative logic to enter the TRGGER IN terminal at the back of the instrument. The signal logic of the sweep trigger input signals is fixed to negative logic, which cannot be changed. The pulse width of sweep trigger signals must be 5 ms or more. The action when entering a sweep trigger is the same as that for the SWEEP key or SINGLE key. The sweep trigger function detects sweep trigger signals by polling in certain cycles. Thus, the time after a sweep trigger signal is input until the sweep starts will fluctuate in the range of 5 ms. Trigger Output > This function outputs trigger signals from the trigger output terminal on the rear panel of the instrument (only during sweeping).