The amount of data is generated in continuous mode?

I'm trying to implement a measure of voltage using a card PCI-6071E. I looked at some of the samples (ContAcqVoltageSamples_IntClk_ToFile) that uses the AnalogMultiChannelReader to collect the data asynchronously and write to a file. My question is, if I do 2000 samples per second with 200 samples per channel, the amount of data will be generated? By using compression really will make a big difference in how much data I have to deal with that? I want to graph data 'real time' in certain circumstances, but usually save the file for post processing by another application. My tests can be run for several minutes. I looked at the things given compressed, and I didn't understand how I could read the data back and understand what data are intended to what channels and the amount of data belongs to each channel and each time slice. Thank you

How many channels are you reading from?  Samples per second, is what will tell you the amount of data that you produce.  Multiply this number by the number of channels and you will get the total number of samples per second of the generated data.  (The samples per channel determines just the size of buffer in continuous acquisition, so it is not used to determine the total amount of data being generated.)  Each sample will be 2 bytes, so the total amount of data will be 2 * 2000 * number of channels * number of seconds during which your test runs for. From your description, it sounds not compression is really necessary; just save your files regardless the other format your program can read (text delimited by tabs, or any other common format files) and do not worry about compression, unless the size of your files become prohibitive.

-Christina

Tags: NI Software

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