To the bottom of the sample

Hi all

I need to re - sample a 1KH 1MH tdms file, it seems that it is possible with the help of "Sample Compression" but the point is the entrance to this block is a single signal and my tdms file consists of a few different channels a beginner I don't know how to get my file PDM signals and connect them as inputs to the block of "Compression of the sample!

I would really appreciate if someone can help me with some advice.

Thank you very much

Navid

Read your file TDMS using the open functions then reading PDM.  Here you can specify the offset and length to read.  You can then put this into a while loop get 1000 samples at a time stopping when there is an end of file error, or your reading returns less then 1000 samples.  Take these samples of 1000 and get the average of them.  Then write this single data point to the TDMS file as a new group.  Then close the file TDMS times all 1000 pieces have been processed.  Then you will have a file with the raw data in the existing group and decimated in the new data.  You can also choose to save them in a new TDMS file but I find that to do this way because it would be all in one file.

Tags: NI Software

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