synchronization - DAQmx not triggering

[sueshan]

I have worked with labview 8 for a little while & have never used it for synchronization. We have a PXI1042 chassis connected to the computer using 8331. 6723,5122,5412 need to be synchronized & I am using the clock from 6602 as a trigger for this. The application requires the DC outputs to be at changing levels from each of the 20 channels and at certain points the AWG & Digitizer have to get triggered with a certain microsecond delay. This accuracy is key to the application. All components are working  except for the synchronization bit. The problem I am having is that the DAQmx is not reading the pulse from the source line to get triggered. On the other hand, if I try to make the a/o the source, I can't seem to configure the DAQmx to send out a trigger either. Any ideas on how this can be accomplished would be greatly appreciated!!

Thanks!
Sue

[SpeedyMart]

Hello Sue,

            Can you elaborate on what product isn’t triggering properly. Is this the 6723 that’s not triggering correctly. The others are supported by NI-FGEN and NI-SCOPE. Do you have the trigger signal sent over PXI_STAR and have the devices triggering off the signal on that route? It sounds like you are never receiving a trigger on the 6723. Are the other devices receiving the trigger correctly? Are both the trigger and clock coming from the 6602 and PXI routes?

            The only recommendations are to be certain that the cards are triggering correctly on their own, to be sure there is no hardware problem. Hopefully we can get this settled soon.

            The link is a great reference to synchronization with DAQmx. You may be beyond anything here, but maybe it can be helpful in localizing the error.

            Regards,

                        Chris

[sueshan]

Hi there

 I guess I was exporting the trigger incorrectly - none of the lines were triggering & I knew it had to be somethign in the configuration of the trigger. i figured it out through trial and error basically... 🙂

Thanks for hte help! 🙂

Sue