Ats20 Firmware Better -

The ATS20 (and its popular successor, the ATS20+) is a staple in the world of low-cost SDR (Software Defined Radio) and portable shortwave listening. For under $50, hobbyists get a compact, Si4732-based radio capable of SSB (Single Sideband), AM, and FM reception. However, the stock software these devices ship with often leaves much to be desired.

One of the most clever snippets from an open-source ATS20 firmware build handles SSB BFO (beat frequency oscillator) control: ats20 firmware