Recording raw data with PCI 6259

[abdel2]

I am thinking of recording raw data because the max resolution of the card is 16 bits and DAQmx Read gives me a 64-bit (converted to 32-bit) value. This is waste of hard disk space.

However I couldn't find any information on the format of the raw data from this card. Is it interleaved? 

[mikeporter · Accepted solution]

If you use the raw data version of the DAQmx read function you get an array of 16-bit data (signed or unsigned - you have your pick) that is exactly what is coming from the A/D. To convert the data back to engineering units you will also need to save the scaling value so you can make the conversion yourself.

If you are reading multiple channels, the first element is channel 1, the second is channel 2, the third is channel  3 and so on. 

Mike...

[abdel2]

Thanks you.