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Electronic Engineer Discuss»Forum › (Oscilloscope)示波器 › 虚拟示波器 › HT60004BC二次开获取波形数据计算电压值偏大？ ...

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HT60004BC二次开获取波形数据计算电压值偏大？

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Post time 2019-12-20 16:41:47 | Show the author posts only Reply Awards

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我调用 DLL_API WORD WINAPI dsoHTGetData(WORD nDeviceIndex, WORD* pCH1Data, WORD* pCH2Data, WORD* pCH3Data, WORD* pCH4Data, PCONTROLDATA pControl)函数，根据（pCH1Data[i]- 通道垂直位置）×电压档位/32 这个公式计算的电压比实际打压大200mV左右，请问是什么原因导致的？

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Post time 2019-12-24 16:58:23 | Show the author posts only

您可以查看是否是零电平的问题，或者通过计算Vpp来验证。

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Author| Post time 2020-1-3 19:21:52 | Show the author posts only

对不起，我描述有误，应该是电压值绝对值比实际电压绝对值大20%左右。通道垂直位置我已经设为128了

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Author| Post time 2020-1-3 19:24:51 | Show the author posts only

实际幅值是20V,但是计算出来的值已经超过幅值

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Author| Post time 2020-1-3 19:26:10 | Show the author posts only

绘制图形的截图

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Author| Post time 2020-1-3 19:28:54 | Show the author posts only

这个波形实际幅值是10V

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Author| Post time 2020-1-3 19:29:42 | Show the author posts only

wangshuang replied at 2019-12-24 16:58
您可以查看是否是零电平的问题，或者通过计算Vpp来验证。

麻烦您再帮我看看是什么问题导致的？

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