Here is a YouTube video about Stand alone HPSDR Transceiver Using Inexpensive Processors, and is part of a growing collection of videos I have found to be useful. The reason is see John present a powerful direct sampling SDR for QRP and portable operation, using the WDSP processing software for Anan and other HPSDR radios and understanding science related to software defined radio.
This tutorial, "Stand alone HPSDR Transceiver Using Inexpensive Processors" is free education you can watch, which will help you deepen your knowledge and be better prepared for licence exams, schoolwork, or operating radio equipment.