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controling agilent E4990A impedance analyzer using USB & labview

I have downloaded the driver of E4990A,Now,I can control it to set the Measurement parameters,and some marker parameters.there is the value on the  impedance analyzer.But I cannot to read the value from impedance analyzer on the PC with the simple example.it will be 0 or 9.91E37. can u help me please? thank you! 捕获.PNG

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Hello,

Hi small fish,

What is your problem ? If it is code issue you didn't explain your problem well enough. If your problem is that the measure expected is not what you are measuring you have to explain why it is not the expected value.

 

Best Regards

______________________________________

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hello,thank you for your answer.the code is the picture in my question.it is the  example code of e4990a,but it does not work.My problem is that the last read value VI do not read value.The value in labview is 0,but there is the value in the e4990a impedance analyzer.Now there is the code.

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