Is it possible to synchronize two NI USB-9162 chassis?

[d.rad]

First of all is this question in the right location? Or should I post it to signal conditioning? Anyways I am attempting to collect voltage differentials using two NI USB-9162 Chassis, one with a NI 9215 module and the other with NI 9219 module and i am getting wierd results when I write the measurment ot a file. Any hellp would be greatly appreciated!

Thanks

[JasoNI]

Hi d.rad,

Although the Multifunction DAQ board may be a little more appropriate for this question, this one works as well.
The synchronization occurring in the posted VI is not very exact, because the triggering is software timed.

In order to be synchronized, we need to start at the exact same time, which is not guaranteed by the software timing. An even better method is to start at the same time and look at the same clock in order to stay in sync. There are more details in the white paper.

Synchronizing Multiple cDAQ Chassis: http://www.ni.com/white-paper/5376/en/

Regards,

Jason D

Applications Engineer

National Instruments

[d.rad]

I think I will look into a new chassis to get a better result. On a related note,(I am fairly new to LabVIEW), could I get a brief run down on Daqmx vs. Daq assistant? Which is better and why?

Thanks

[JasoNI]

Hi d.rad,

The DAQmx functions provide the same functionality as the DAQ Assistant, but broken down into the lower level functionality. Essentially, you could create the DAQ Assistant using DAQmx functions. The DAQ Assistant is easier to use, but less efficient than the individual functions.

Also, I would recommend calling in to support if you plan on getting a new chassis so that you can verify that the choice you make will properly fulfill your requirements.

Regards,

Jason D

Applications Engineer

National Instruments