Here is a YouTube video about Bob McGwier N4HY Discusses SDR and the Flex 6700, and is part of a growing collection of videos I have found to be useful. The reason is listening to a discussion of the innovative architecture and software of the Flex 6700 SDR transceiver and understanding science related to software defined radio.
This tutorial, "Bob McGwier N4HY Discusses SDR and the Flex 6700" 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.