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![RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source](https://www.rtl-sdr.com/wp-content/uploads/2015/02/SWR_noisesource.jpg?ffccfa&ffccfa)
RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source
![RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source](https://www.rtl-sdr.com/wp-content/uploads/2015/02/BG7TBL_noise_source.jpg?ffccfa&ffccfa)