Hello,
I need assistance performing instrumentation testing, to validate synchronization.
I have a cRio project consisting of two chassis one cRio-9068 (master) and one cRio-9067(slave).
I'm looking for a way to test that the two chassis's are capturing data synchronously. The chassis are currently sharing a 12.8 MHz clock from the 9068 being distributed using a NI 9469 synchronization module. The 1613Hz acquisition loops for the FPGA VI's are being triggered to start logging simultaneously and reporting values back to a RT target on the 9068 chassis. These values are then being logged to disk on the 9068.
I have multiple modules in the project and I need to confirm that all the measurements are synchronized.
I need to test the time correlation between the following modules on the two chassis, not all modules need to be tested, but one of each type. eg. a 9205, 9237, and 9234 on the 9068 chassis with a 9401, 9237, and 9234 on the 9067
9068:
1x NI 9205
4x NI 9237
1x NI 9234
9067:
1x NI 9401
4x NI 9237
1x NI 9234
Any suggestions on how to test the implemented system would be greatly appreciated.
I've already tried using a square wave from a function generator, but I beleive the problem with the 9237 modules is that they are expecting a constant current from a string gauge....The 9234 may work if I change it to DC coupling. The 9401 and 9205 work flawlessly under this test.
