Inexpensive RF Spectrum Analyzers for Wireless Mics!
An RTL-SDR Spectrum Analyzer | Hackaday
Getting Started With RTL-SDR Airspy SDR# Spectrum Analyser Part 1 - YouTube
Mobile Spectrum Analyzer + Digital TV - Software Defined Radio Series #30 - YouTube
spectrum analyzer
USB-Based RTL-SDR Radio Tuner RF Spectrum Analyzer For Android Devices | eBay
GitHub - xmikos/qspectrumanalyzer: Spectrum analyzer for multiple SDR platforms (PyQtGraph based GUI for soapy_power, hackrf_sweep, rtl_power, rx_power and other backends)
Using the Airspy as a low cost Spectrum Analyzer with Spectrum Spy