how can I sample 1 KHz asynchronous data using a PXI 6229

[mebels_meta]

Yes. I would like to smaple the data deterministically. I know the frequency of the demodulated data. I was hoping I could trigger a clock starting on a rising or fulling edge of the data. Then use that clock to continue sampling.

[Agamemone]

I am not sure of the level of determinism you require, if it is high enough you may want to look into using a Real-Time OS. Otherwise you should look into some of NI's PXI Sync Resources

Synchronization Explained:

http://www.ni.com/white-paper/11369/en/

Reference Clock Synchronization:

http://zone.ni.com/reference/en-XX/help/370466V-01/mxcncpts/syncrefclock/

I think Reference Clock Synchronization would probably suit your application best. That way all of your cards will be referencing the back plane clock and will phase lock loop to it (essentially a feedback loop to maximize synchronization for each of your devices).

[mebels_meta]

OK. Will try this.