Spectrum of DAQ received signal

[rashp8]

So I have transmitted a chirp signal to a low pass filter using DAQ assistant and wanted to analyze the spectrum of received signal.  Though the received signal in time domain is okay why am I not being able to get spectrum? Is there any different approach to get the spectrum of signal when it is received through DAQ?

[ConnerP]

Post your code.

[rashp8]

I have attached the VI. I am taking spectral measurement just after receiving the signal. Is it okay?

[Bob_Schor]

I am assuming you have had no instruction or lectures or discussions with someone knowledgable concerning LabVIEW, and have not availed yourself of the various Tutorials (including those mentioned on the first page of this Forum).

A Key Concept in LabVIEW is the Principle of Data Flow.  Your code shows no understanding of this Principle.  Here's the key question -- which comes first, Data Acquisition or Data Generation?  How do you know this?

Spend a few hours learning something about LabVIEW, then try again.

Bob Schor

[rashp8]

Thank You.

Can you provide me some links to study about "principle of data flow". The code maybe a bit different because the device that I am using to type this is not having DAQ cards so I copied the code from the device that I am using to run the program. As for as Data Acquisition and Data Generation, data generation comes first, its what I give as output and then data acquisition is what I receive back from the medium. The way I understood at least.

[Bob_Schor]

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@rashp8 wrote:

Thank You.

Can you provide me some links to study about "principle of data flow". 

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Sure.  Open a browser and type in "LabVIEW Data Flow".  Pick several and read them.  Then revisit your Block Diagram, which shows two processes (Data Generation and Data Acquisition) running in parallel, with no syncronization, no specification of "which comes first" or how they relate temporally to each other.

To do what I think you want to do, you need to be more "up to speed" with LabVIEW and how it works.  Spend time (hours, at least) with the LabVIEW Tutorials (check the first page of this Forum).  Take a Class.  Study for a Certification Exam.  Write (and run, and debug, and test) LabVIEW code.  If you can, find a LabVIEW Guru and apprentice yourself for a while.

Bob Schor