HB9UF: DDS Output Spectrum

This video is only remotely related to my spectrum analyzer project. I am checking the output spectrum of a DDS that I built for a ham radio repeater. In the process, I explain the concept of CTCSS/PL tones and discuss the requirements for a filter at the DDS output. At the end of the video, I address the question on whether a simple, filtered square wave would be equally suitable for the job. Links: Original SA project by Scotty Sprowls: http://scottyspectrumanalyzer.com/ Previous DDS video:    • Homebrew Spectrum Analyzer 9: The internal...   ADI Document "Fundamentals of DDS': http://www.analog.com/media/en/traini... My DDS code: https://github.com/HB9UF/aux_pic.X/ Project documentation: https://hb9uf.github.io/aux_pic.X/