Ingredients:
– android app: https://play.google.com/store/apps/details?id=com.mantz_it.rfanalyzer
– micro usb otg cable
– RTL-SDR V3 dongle (I used the simple rtlsdr dongle from ebay, but the RTL-SDR blog type is much better value for your money, it has TCXO just to name something)

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