The AI Synchronization of multi-device in the PXI by the SubVI of DAQmx Create Channel

[William1225]

Hi,

There are two PXI-6123 cards in the slots of the PXI-8109, and then I'd like to acquire the analog input signals simutaneously.
The manual of PXI-6123 recommanded using a common timebase as the Master Timebase and share to the slave devices.

I wonder, however, if I can take advantage of the method as the attachment, including all the AI channels of this devices in the physical channels to create.

Does it work?? How do I know what are the "certain NI data acquisition devices" in the passage of the attachment?

[SmilingPhil · Accepted solution]

Hello,

Please refer to this KB: http://digital.ni.com/public.nsf/allkb/78E44565FD87E7D686257108007F94F8. I think you are good with your two PXI-6123 devices, if only you have DAQmx 8.1 or later installed. Please come back and let us know your test result.

Thanks,

Phil

[William1225]

Hi,

Very thanks to your suggestion!
In fact, I've tried it in such a way and the result seemed to be all right.
According the KB, It let me know the method should be useful.
But the filenames of the attachments(GoodSync.GIF, PoorSync.GIF, Channel.GIF) confused me a little:

The manual synchronization method referred to "PoorSync", and the automaticsynchronization method referred to "GoodSync".

Could it be that automatic method is better than manual method???

[SmilingPhil]

Yes, the automatic method is suggested if this is applicable to the user's devices. Imagine you have three or more devices need to be synchronized. It will be harder and harder to track the wiring when the number of devieces increases. Let NI-DAQmx do the work behind the scene will make your life ten times easier.