Square on the map digital wave

I want to have a simple square wave (duty cycle 50% - didn't need to change) at the exit on a digital map of labview IO.

My problem: 9472 and a 9403 are the cards I have. When I start my VI of squares (attached), I just can't get enough high frequency. For example, map of 9472 is accurate up to 25 hertz. I checked on an oscilliscope and once I turn the last frequency 25 Hz on VI, the card seems out max and it won't display anything faster than 25 Hz. In addition, for the 9403 the same thing, except that the 9403 card seems to have a frequency limit of 11Hz about. Once, 1-11Hz, the map is very accurate of what is on my VI, but when I turn the VI above 11Hz, the map seems maxed out and just stay at 11Hz.

I'm looking to get up to 500-600 Hz range.

What is causing my cards be limited to these frequencies? How can I increase the frequenies that they went out to about 500-600 Hz?

Thank you!

The 9472 is a module of software timing. You will never get 500-6000 Hz out of it. When used in an NI CompactDAQ chassis, the NI 9403 module can serve only static type (timed by the software), so it has the same problem.

Tags: NI Software

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