pci-6251 for square wave voltage measurement
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From: detech on 7 May 2008 11:40 HI, NI experts, We just bought PCI-6251 card for square wave voltage measurement from x-ray tube. The voltage is a negative square wveform. I want to use software trigger to trigger the falling edge of the voltage at certain level (can be adjusted based on the noise level in the site of measurement). It is going to be a function of single trigger of digital scope. Once the trigger level is settled down, it will wait for the voltage signal to trigger. Once it triggered, the voltage waveform will be recorded. I found a lot exsample under ../hardware input and output/daqmx/analog mesurement/... But I am not sure which one is close to my application. There are some opitions like internal clock, external clock, and all kinds of digital triggering. Please give some advice which example is close to my application and how to modify it for my application. Thank you very much for help. Liming |