A GUI-based variable-range sweeping (non-realtime) spectrum analyzer program called fcd-spectrum has been implemented in java for use with the FUNCube Dongle Pro+ SDR. It aims to report approximate input power in units of dBm relative to frequency. Automatically adjusting-and compensating for-gain, fcd-spectrum writes to a .CSV file and has a built-in viewer. Example sweep times are about 1 minute for 88-108MHz and about 2 hours for the entire 150k-2G range. CLI-only mode operation is also supported. This application is licensed under GPL3.Note: There are issues with running this software in Mac OSX (see Issues tab on project page)
https://github.com/cjritola/fcd-spectrum
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