How can I record several channels of data at different rates with the same card?

I am building an application in which I need to record several channels of DC voltage data to disk at different rates, for example, Channel 1 at 40 Hz, Channels 3-5 at 10 Hz, Channels 6-8 at 1 Hz, etc.
All these channels are time-referenced, so I need to make sure data for channels recorded at slower rates line up with their correct time stamp.
Currently, I am building all data into a 2D array one row per loop iteration.

Hello;
At this time, the NI DAQ boards have only one scan clock, so, you can only define one valid scan rate for all of your channels.
The better approach for you is to sample all channels at the highest rate you will need, and then discard the samples you don't need to save.
Hope this helps.
Filipe

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