Ham 100KHz-1.7GHz full Band UV HF RTL-SDR USB Tuner Software Defined Radio Receiver R820T 8232WHAT IS SOFTWARE DEFINED RADIO (SDR)? In traditional hardware radios, the mathematical operations required to decode and process radio signals are performed using analogue circuitry. Recently, computers have become powerful enough to perform the required mathematical calculations in software, hence the term software defined radio. This has led to advanced radios that previously required complicated analogue hardware now being able to be implemented