03-14-2025 03:57 PM
I discovered an odd issue today. I have a really simple LV RT application that is running on a cRIO 9040. It captures AI voltages at 20kHz.
I noticed that I was getting a lot more samples than I expected. It seems like either the clock on my CRIO or my system clock is really inaccurate. Or I am just doing something wrong.
I suspect it is the cRIO because when I sample some OPC tags, they match the count on my Windows clock.
Below is a screenshot of my code. And I attached my code, too.
Can someone explain this to me? I should be getting 20,000 points a second, but it looks like I am getting a bit more than that?
Solved! Go to Solution.
03-14-2025 04:45 PM
03-14-2025 06:56 PM
It’s a NI 9232. Going to use it for some remote vibration measurements.
03-14-2025 07:15 PM
The 9232 is a DSA device. It can only sample at specific divisors of its internal master time base, 13.1072 MHz.
I am guessing that it is sampling at 20.48kSa/s. The formula is
03-14-2025 08:21 PM
Oh wow that is totally it! Thank you!
03-15-2025 03:21 AM