The R820T tuner IC is used in the popular Airspy software defined radio (SDR) as well as many of the inexpensive RTL SDR dongles. [TLeconte] did some experiments on intermediate frequency (IF) conf… ...

The “Spectrum Spy” software and Airspy SDR I used for those measurements can also be used as part of a very portable, simple, inexpensive field measurement setup. This setup is not a replacement for ...