simultaneous multi channel sampling using NI 6259

[droberts]

I am currently using an NI DAQ 6259 board to sample 5 sensors. I know this board does not offer true simultaneous sampling, however I would like to use correlation analysis on my data.

Is there a away I can calculate  the time delay between each channel casued by the multiplexing of each of the individual channels?

[Jonathan_S1]

Hi,

What you are interested in is the interchannel delay.  This can be calculated by taking the inverse of the AI Convert Clock freqeuncy.  This article discusses how the DAQmx driver calculates this value.  This article discusses the correlation between the sample clock and the convert clock.  The value can be determined through a DAQmx Timing Property Node.

I hope this helps!

Jon S

[droberts]

Thanks Jon,

Does the DAQmx driver take into account the setting time between each channel as this would also affect the convert clock rate? Do you know of a way that the final inter-channel delay can be outputted from the DAQ Assistant?

Dave.