FPGA Wait command timing is off

[elnav]

Hello,

I'm working with and existing Test rack and I'm having problems with an FPGA card 7833 not outputting correct output pulses. The code uses the Wait timing VI to vary the pulse width, have replaced the 7833 with similar results. We do have a second test rack and works fine on the second rack. For clocking the FPGA wait function is there a setting somewhere I should be looking for. The PXI chassis is the PXI-1045 using Labview RealTime 8.5. Failure example expecting a pulse with 4ms and outputting a 10ms pulse, code then varies the pulse with to 2ms and outputs the 10ms pulse once again.  

Any ideas would be appreciated.

Thanks,

Ricardo

[Dave.C]

Hi Ricardo,

I'm not aware of a setting for the FPGA wait function.  I've simulated the 7833 and tried to get at the timing settings but have not been able to change anything.  Could you tell me a little more about how how you're generating and measuring the pulses.  Also it might be helpful if you could post a screenshot of your code and your project hierarchy.   

[elnav]

This is existing working code I'm working on, the wait function is running on a PXI 8106 controller with Labview real time. I was able to swap the PXI 8106 from a second test rack and that resolved the problem. So I got a PXI 8106 controller with a bad internal clock circuit. Thanks,

[Dave.C]

Hi Ricardo,

RMAs are handled over the phone, so if you'd like to start that process, you may do so by creating a service request (SR) and calling in.  Clicking this link will take you to the login screen which will enable you to create a new SR.  From there, you can call our customer service number at (800) 531-5066.

Thanks and have a great day!