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Homebrew spectrum analyzer

Homebrew spectrum analyzer

This DC to 50 MHz spectrum analyzer uses a standard oscilloscope for display. Dynamic range is better than 70dB using the received signal strength indicator (RSSI) of an FM demodulator IC.

http://www.holmea.demon.co.uk/SpecAnHtml/SpecAn.htm

The Design of an FM Radio Spectrum Analyzer

The Design of an FM Radio Spectrum Analyzer

During the operation, the frequency is continuously swept from 88.0 to 108.0 MHz in .1Mhz steps. At each interval, the current across the output is measured

http://www.ee.washington.edu/circuit_archive/circuits/ee498/final/final.htm

Three Channel Spectrum Analyzer

Three Channel Spectrum Analyzer

http://www.web-ee.com/Schematics/ThreeChanSpecAnalyzer/ThreeChanSpecAnalyzer.htm