LabVIEW
Re: FPGA FFT
hello
I hope you are doing well. I am working on a project that we have problems with The voltage and I want to make a LabVIEW diagram and see how the signal is working.
I connected a voltage transmitter to the NI9207 current input card and created the program as I want to use the FFT to determine at what frequency I will have the highest voltage. The voltage transmitter indicates the output of a power supply. I want to see how this output works.
The waveform isn’t showing the real case which should illustrate the highest point.
Hi Belinda,
@Belinda wrote:
I am working on a project that we have problems with The voltage and I want to make a LabVIEW diagram and see how the signal is working.
I connected a voltage transmitter to the NI9207 current input card and created the program as I want to use the FFT to determine at what frequency I will have the highest voltage. The voltage transmitter indicates the output of a power supply. I want to see how this output works.
Several issues:
- You don't provide information on your hardware.
- You don't provide (real) LabVIEW code, just images of code. We cannot run/edit/debug images with LabVIEW.
- You use the DAQAssistent and those ugly DDT wires a lot. Many of us don't like them and usually we recommend to use plain DAQmx functions!
- There are coercion dots visible in your image: do you know what they indicate?
- The FFT graph looks quite ok, but your waveform chart only shows truncated data with wrong scales: this is related to the coercion dots and your mis-configured chart. As we cannot inspect your code you need to do that on your own…
- There are several indicators with the same label (like "Tension"). This is bad programming style…
@Belinda wrote:
The waveform isn’t showing the real case which should illustrate the highest point.
Why do you think your current VI will automatically "illustrate the highest point"?
I don't see any code related to finding maximum/maxima in your FFT result…
