Thank you very much for reply. Your file I could not open as I am using LabVIEW8.2 version and your file is in version 11.
However I plot the waveform succesfully both in time as well as frequency domain. But in frequency domain, on x-axis scale is fixed at 0.49Hz (in auto scale mode). I change sampling rate from 1000hz to 4000hz but frequency on scale is fixed to 0.49Hz. I dont know why this is being happen. Can you please guide me regarding that..(Remember that I am using USB1208FS for data acquisition and using universal library MCC DAQ. The vi which i choose to collect real time data is AInScBg.vi)
If you have skype ID then please send it to me so that we can discuss in detail. My skype ID is irfan16.uetian