Error -20061 occurred at NI_MABase.lvlib:Sine Waveform.vi:2090002 >> NI_MABase.lvlib:ma_Trap Fgen Parameter Errors.vi:5950001 frequency must be <= sa

[yas07]

Hello, I tried to create 2 sine waves and add them together. Then I want to take the output and have this as an output signal from my NI DAQ USB-4431. But i'm getting the bellow error.

Error -20061 occurred at NI_MABase.lvlib:Sine Waveform.vi:2090002 >> NI_MABase.lvlib:ma_Trap Fgen Parameter Errors.vi:5950001
frequency must be <= sampling rate/2

I opened the sine wave generator and changed the sampling frequency but it's getting reset to to 1k sampling frequency automatically and giving me the same error.

 Can anyone help please?

[ZYOng]

I don't have any issues running the attached VI on LabVIEW 2022 Q3. Are you using different parameters?

[yas07]

No. My frequency is above 8000 hz for both. Yours is in milli Hz now.  Can you change it and try?

[ZYOng]

You need to add a control or constant and specify the sampling rates of at least 2 times the signal frequency. Otherwise, the default 1k sampling rate is used. Practically, you should specify 5 to 10 times to maintain the shape of the waveform.

Next time, please set the default value of the control before attaching the VI. Right-click on the control, select Data Operation >> Make Current Value Default.