How can I use FREQ_OUT output frequency signal

[Wang 773]

Now,I use VXI-MIO-64E-1 board and Windows/CVI,I want to know how can I use FREQ_OUT single.

Thanks a lot,
Wang

[Heath]

The Frequency Scalar of the DAQ-STC based devices is essentially a third counter that can be programmed only for continuous pulse train generation. See the knowledgebase link below for more info on this. Since this counter is only four bits, this limits the clock divisors to 2^4 or 1 thru 16. Therefore the only frequencies that can be programmed for output on the FREQ_OUT line are timebase / (integer between 1 and 16).

How do I use the FREQ_OUT pin on my E series board?

According to the NI-DAQ Function Reference Manual, the signal name should be ND_FREQ_OUT. The source can then be ND_NONE, ND_INTERNAL_20_MHZ, or ND_INTERNAL
_100_KHZ. sourcespec would follow respectively as ND_DONT_CARE, 1 through 16, or 1 through 16. Note that selecting ND_NONE will disable output on the FREQ_OUT pin.

Thanks,
Heath