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Part of the M Series Synchronization with LabVIEW and NI-DAQmx Example Set
PXI and PCI synchronization are very similar in the sense that they use the same reference clock principle. In a PXI system, a common 10 MHz reference clock for synchronization of multiple modules is already built into the backplane with the PXI_CLK10 signal. To synchronize multiple M Series modules in a PXI system, each one of the M Series modules should use the PXI_CLK10 as its reference clock, which will cause the timebases on all boards to be synchronized with one another. If one master device sends out a start trigger to the other devices and all of their sample clocks are set to the same rate, the acquisitions will be synchronized. Figure 1 shows the block diagram representing M Series PXI synchronization.
Figure 1 PXI Synchronization with PXI_CLK10
Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.