Synchronizing DO with AI at high frequencies

[L.Gilson]

Hi,

i have a PCIe-6341 (max AI: 500 kS/s, max DO 1MHz) and want to output one digital line at 1MHz while capturing several (2 .. 10) analog lines as fast as possible. The DO-pattern is pre-generated and saved in an array. Afterwards i want to know which index in the AI-results array corresponds to which index in the DO-array.

I fail to setup this dune to the different frequency used for AI and DO. Is there a way to take the DO-sample clock, divide it by 2 ... 10 and use the result as sampleclock for AI? My idea is to trigger an AI sample on every second (...10) raising edge, but i don't know how to do this.

Thanks

[Kevin_Price]

I don't have real hardware to test this, but I *think* you should look into doing something along these lines:

-Kevin P

[gregorelectric]

Hi,

since you are using only one PCIe-card the DO and AI have the same timebase anyway, because they are using the same clock. You can try to use a Master Slave Method with the DO as Master and the AI as Slave. The DO is the Starttrigger "DAQmx Start Trigger", to realize a synchronization. The Sample Rates must differ by a multiple Integer.