Here is a YouTube video about HPSDR PureSignal on the ANAN 100 SDR, and is part of a growing collection of videos I have found to be useful. The reason is creating radio signals of exceptional purity and understanding science related to software defined radio.
This tutorial, "HPSDR PureSignal on the ANAN 100 SDR" 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.