Before we dissect the features, we need to define the term. In the ATS20 community, refers to closed-source or highly specialized open-source binary builds that are not available through the official manufacturer (Radioddity or HX-Factor). These releases are typically distributed via Telegram channels, GitHub repositories, or specialized forums like the SI4735 Group .
: Unlike standard firmware where the Beat Frequency Oscillator (BFO) is a separate option, ATS_EX merges it into the main frequency display. This allows for seamless SSB tuning across the entire band, similar to high-end receivers. Expanded Band Coverage : 153 kHz – 520 kHz : 520 kHz – 1710 kHz ats20 firmware exclusive