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We appreciate your patience as we improve our online experience.
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在NI-DAQmx中,可以利用reference trigger來指定成觸發停止(stop trigger)。reference trigger是在一整組的輸入取樣中建立reference的點,這可以讓你在收到觸發的前後截取訊號。使用Pretrigger Samples腳位可以設定在trigger前的取樣點數量,而在trigger後的取樣點數量可以用你設定的取樣點數量,減去pretrigger取樣點數量來自動得到。
這裡有兩個簡單的方法可以在LabVIEW使用NI-DAQmx來設定reference trigger,第一個方法是使用DAQ Assistant Express VI,以下是建立合適的task的步驟:
你也可以使用DAQmx Trigger VI來設定reference trigger。
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