Loss of data when you save it to a file?

Hello

I have problems with my data recording. I acquire at 2.5 MHz for 5 seconds and when I view it I don't see 1.2 s data, if you use a single channel, or unless, as 0.4 s data, when getting the 8 channels.

My vi is attached and also a picture of him. To analyze it, I use "TDMS File Viewer" (PDM - File Viewer.vi):

Attached, it is also a picture of the file viewer. Check the number of samples (225000) and the time when it was taken (19/11/2008 16:14:30.423) and (2008-11-19 16:14:31.362). With a 2.5 MHz, there should be much more samples than what is there...  The last sample (which was not shown in the photo) is time (19/11/2008 16:14:30.513), only 0.1 s after having begun to acquire data.

Is the problem with the queue? If this is not the case, why are data not saved?

Thanks for the help,

Rafael

Your consumption (bottom)) thread will be scuttled as soon the producer (top) out of wire. Leave the upper loop kills the queue; Dequeue item returns an error, and writing to a file won't do anything if there is an error on the entry. If all the remaining items in the queue when he was killed are lost. The best way to solve this problem is to add another loop of thread; After your existing while the loop closes, loop with a short (10 msec) delay until the queue is empty (by Get Queue Status). Kill the queue only after all your results have been written to disk.

Tags: NI Software

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