Shortcut: Pressing down on the rotary knob itself can often toggle fast-tuning modes or step sizes, depending on your firmware version. Operating Single Sideband (SSB) Mode

A physical slide switch or button to completely disconnect the battery and prevent passive drain. 3. Step-by-Step Operating Instructions Powering Up and Basic Tuning

Always back up your stock firmware configuration before attempting an update to avoid bricking the micro-display integration. To get the most out of your radio,If you want, tell me:

Use for amateur radio bands below 10 MHz (e.g., 40-meter band).

Used for tuning frequencies and changing menu parameters. It also functions as a button when pressed down. VOL Button: Activates the volume adjustment mode.

Whether you keep it stock or dive into the world of Arduino‑based radio development, the ATS‑20 will provide hours of exploration across the airwaves.

button to choose your tuning increment (e.g., 1kHz for AM or 10Hz for fine-tuning SSB). Then, rotate the encoder to move across the frequency. Mastering SSB & Amateur Radio

Use the button to select your desired tuning increment. Smaller steps (like 1kHz) are ideal for fine-tuning SSB signals. Larger steps (like 5kHz or 9kHz) are ideal for scanning AM/FM broadcast bands.

Tune to a known ham radio allocation (e.g., 7,100 kHz on the 40-meter band).

The ATS-20 radio manual also covers advanced features, including:

The internal DSP chip is highly sensitive. Keep the radio away from switching power supplies, phone chargers, and computer monitors.

(Lower Sideband). SSB (USB/LSB) is essential for listening to ham radio operators. Step Button

Si4732 + ESP32 / ATmega328P (depending on the hardware revision) Supported Modes: FM, AM, MW, LW, SSB (LSB and USB)

the rotary encoder knob to mute or unmute the audio output. 4. Advanced Features & Customization Automatic Gain Control (AGC) & Attenuation

If you suffer from high ambient RF noise in an apartment, pairing the ATS-20 with an active magnetic loop antenna (like the MLA-30+) via the BNC jack will dramatically clean up your signals. 5. Troubleshooting Common Issues