This application will turn your Red Pitaya board into a 2-channel DFT spectrum analyzer. It is the perfect tool for educators, students, makers, hobbyists and professionals seeking affordable, highly functional test and measurement equipment. The DFT spectrum analyzer application enables fast and powerful spectrum analysis using a DFT algorithm. The frequency span is from DC up to 62.5MHz, where the frequency range can be arbitrarily selected. You can easily measure the quality of your signals, signal harmonics, spurious signals and power. All Red Pitaya applications are web-based and do not require the installation of any native software. Users can access them via a web browser using their smartphone, tablet or a PC running any popular operating system (Mac, Linux, Windows, Android, and iOS). The elements on the DFT spectrum analyzer application are arranged logically and offer a familiar user interface.
The graphical interface is divided into four main areas:
- Run/Stop and Export button: The “Run/Stop” button is used to start and stop measurements. With the “Export” button you can select in which format you want to download the measured data (plotted spectrum). Two formats are available: .png and .csv.
- Inputs / Cursors / Range / Axis control panel: This menu provides controls for inputs, cursors, and frequency range settings. Horizontal +/- buttons are used to select the span of the X (frequency) axis (zooming in/out). The vertical +/- buttons change the Y (amplitude) axis range.
- Graph area: Here, the currently calculated signal spectrum is plotted in the selected frequency range.
- Waterfall plots: Waterfall plots are a different form of signal spectrum representation, where the color on the plot defines the signal amplitude for a certain frequency. The waterfall plot is useful to enable the representation of a signal spectrum in a time dependency.
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The platform software is Open Source and available on Github. Device functionalities and data can be accessed through Matlab, Labview, Scilab and Python API’s.
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