Used to delete stations in favorites menu (firmware dependent). Toggles Automatic Gain Control On/Off. Helps maintain audio level stability. Rotate to tune frequency; press to confirm or enter menus.
: If you need a more detailed English manual, many users recommend the ATS-20+ Advanced Firmware User Manual for detailed button maps and setting definitions. Lets upgrade the ATS 20+
Issue: Constant clicking or buzzing noise on Shortwave bands.
The original factory firmware is buggy. To truly have a better manual, you need better software. The open-source community has created two superior firmwares: ats20 radio manual better
Warning: The stock manual says not to flash. Ignore it. Flashing is the only way to fix the muting delay bug.
Most ATS-20 models use a similar interface controlled by physical buttons and a rotary encoder (tuning knob). ひろくんのホームページ Power On/Off : Press and hold the power button for approximately Band Selection
mode. This allows for fine-tuning the voice clarity (typically in 10Hz or 25Hz steps). ひろくんのホームページ Advanced Features & Hidden Menus Used to delete stations in favorites menu (firmware
: It is highly recommended to turn the radio off and recharge once the battery hits 10% . Draining it completely can cause power-cycling issues that may stress the internal Arduino Nano controller.
Unlocks frequencies outside standard factory limits.
Pressing the FREQ knob inward cycles through available step sizes (e.g., 1kHz, 5kHz, 9kHz, 10kHz, 100kHz). Rotate to tune frequency; press to confirm or enter menus
By moving beyond the basic documentation and implementing these techniques, the ATS-20 becomes a more effective tool for radio listening.
: Toggles Automatic Gain Control on or off to stabilize signal strength. Getting Better Reception
A more accurate visual representation of signal strength.
While the official ATS-20/ATS-20+ manual is often criticized for being basic, the radio's standout "better" feature is its adjustable bandwidth filters