We are timestamping data coming in using the 20MHz clock and a paired counter on a PXI-6123. The problem is that when the first counter carrys over the second counter has a delay before the the carry is counted. This delay is around 20ms. The clocks are setup in LabWindows as follows:
DAQmxSetChanAttribute(lowTimerTask, "", DAQmx_CI_CountEdges_Term, "20MHzTimeBase");
DAQmxSetChanAttribute(highTimerTask, "", DAQmx_CI_CountEdges_Term, "PairedCtrOutputPulse");
We are currently running fast enough that the clock does not overflow twice before it is recorded and I can correct it. It is annoying though and I want to find a better way to fix it.
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