Timing is right for real-time spectrum analysis

What is RF? What is an RF tuner?
Radio frequency (RF) is the range of electromagnetic frequencies above the audio range and below infrared light (from 10kHz to 300GHz).
RF tuner
An RF tuner is a circuit module or standalone equipment that detects radio-frequency (RF) signals usually of low amplitude and amplifies and converts them to a form suitable for further processing.

What is wireless communication?
Wireless communication is the transfer of information over a distance without the use of electrical conductors or "wires." The distances involved may be short (a few metres as in television remote control using infrared light) or long (thousands or millions of kilometres for radio communications).