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量一個有接地的訊號，應該用哪種模式量測最好？
硬體: Multifunction DAQ (MIO), Multifunction DAQ (MIO)
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問題: 量一個有接地的訊號，應該用哪種模式量測最好？
解答: 您可以用differential或non-referenced single 兩種模式去量測。最佳的方式是differential，它可以消除共模雜訊。增加訊號雜訊比。因此，如果您要量測低位準的電壓，（低於2V）最好用此模式。其缺點是它比使用non-referenced single （NRSE）模式減少了一半可使用的頻道數。如果您量測的是一高電位的訊號，而且需要多個頻道數，您可使用(NRSE)模式。不要用RSE模式量測。它會產生地迴路。
相關連結:
National Instruments Product Manuals
KnowledgeBase 0GI98T03 : Which Mode Is Best for Measuring Floating Signal Sources?
KnowledgeBase 1PQDTM00: How can you set different channels on an E-Series board to acquire in different modes
附加檔案:
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報告日期: 12/19/1995
最後更新: 09/08/2005
文件偏號: 0GI9S503