Based on schematic supplied by the user simon.plata over on atariage.com, this module is intended for use when doing a composite modification of Atari consoles such as the Atari 2600. While not ideal, Composite for the most part is what we have available in the form of analog TV inputs where I live so if you haven't installed one already - I highly recommend that you try it since RF is truly horrible these days and your Atari deserves better!