Changes the frequency step size (1kHz, 5kHz, 9kHz, etc.).
Check your antenna connection. Ensure the BNC male plug is locked securely into place. If you are indoors, modern radiant barriers or concrete walls can completely block RF signals; move closer to a window.
Press the button to select your desired spectrum (e.g., SW for Shortwave). ats-20 radio manual
Ensure the cable is plugged into the charging port, not the data port.
The ATS-20 feels premium. The rotary encoder (knob) is the primary control. It has a bright 1.8-inch or 2.0-inch TFT color display. Do not lose the tiny reset button pinhole—you will need it. Changes the frequency step size (1kHz, 5kHz, 9kHz, etc
Because the ATS-20 architecture is open-source (built around Arduino and SI4732 libraries), you can update the firmware to unlock new features like a spectrum display bar, expanded frequency limits, or improved scanning modes. To flash new firmware:
To enter the Setup Menu, press and hold the (or sometimes a dedicated "Menu" button depending on firmware) for 2 seconds. If you are indoors, modern radiant barriers or
Displays the exact signal strength in dB. Frequency Scanner: Automatic searching for active stations.
The ATS-20 SDR receiver is a testament to the power of open-source hardware and community-driven development. While its "manual" is not a single, static document, but rather a collection of GitHub pages, forum posts, and enthusiast guides, mastering this radio is an achievable and highly rewarding journey.
: Rotate the main encoder knob. Short-pressing the knob typically changes the tuning step (e.g., 1kHz, 5kHz, 10kHz).