Different Sampling Rates with the same AIO Connector, Labview FPGA

[looking4answers]

Hi,

I am using LV 2009 with the newest FPGA toolkit and a NI PXI 7854R. I aquire a analog signal with a sampling rate of 600kS/ s. I need that sampling rate for further data processing, but i also need the signal sampled with a much lower, variable sampling frequency to make a FFT. 

I attached a picture to clarify in a simple example what i am looking for.

I tried it with the case structure to only take every 'iht iteration but didnt get the expected results.

Does anyone have an other idea how to solve my problem? By the the, the "Resampler" express VI from the FPGA funtion palette does not help me.

Thanks in advance,

Regards 

[UM · Accepted solution]

Hi,

the connecter for the analog input is a "shared resource", so you should it only ones in your FPGA Code.

Find attached an example which demonstrates how to perform this analyses task.

Regards

Ulrich

AE NI-CER

[looking4answers]

Hi Ulrich,

Thank you for your answer.

 Even though i am not sure if the "shared resource" subject is the problem, your example solved my problem.

So..  Thanks again!

Best regards