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HP34970A input buffer overflow problem

    Hello,everyone.

    I use LabVIEW 8.5 and HP34970A  woth module 34901 to do my graduation project.Since I am a new learner ,I first run some of the examples attached with the 34970A's driver from NI to get start. The driver type is "Plug and Play" ,the driver version is LabVIEW 8.0.

    Some of the examples runs well without error ,like "HP 34970A Switch example.vi" ,however others doesn't ,like "HP34970A Advanced Scan Example.vi".For the later example ,HP34970A returns "error 521",namely "input buffer overflow".To be simple ,I extracted one part of the example and created an simple one only with voltage scanning called voltage.vi as attached. My VI runs well when in highlight running mode with less than three channel scanning,but is doesn't when in normal running mode ,nor does it in highlight running mode with ten  channels scanning .Has anyone got the same problem before.

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The driver is provide by HP, you may contact them for support.
District Sales Manager | Shanghai Pudong, China
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