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Maximum sampling duration using NI 9775 & Maximum number of records

I am slighlty confused with the foruma in Page 13 of the NI 9775 datasheet that shows how to calculate the max number of samples per record.

 

I consider using the NI 9775 module in record mode. I would like to sample two AI channels simultaneously at a rate of 10 MS/s, transfer the recorded data to a PC, and repeat this. What is the maximum duration that each channel can sample, given that the onboard memory is 128 Mbits?

 

Also, what does the maximum number of 32 records mean on Page 13 of the datasheet?

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Bump. Any help is greatly appreciated!

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