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Question on NI PCIe-6320 events counting

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Hello, all:

 

 I am using 6320 for digital events counting. I am using a gated buffer counting method. At the end of each counting period, I read all buffered events out to get their timestamps. However, there is a problem with this method. When the events number exceed 1 million (?), all buffered events lost and I can not read out anything. My guess is this is due to buffer size or counting clock rollover. (?)  There are basically two ways to overcome this problem. One is to do multiple events reading and the other is prescale the events. Does anything know how to perform prescale counting? For example I may just count the timing of every fifth event.

 

 My counting method was be seen in the attached vi.

 

 Thank you.   


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