Toggle it to the "ON" position. The OLED screen will light up, displaying the firmware version followed by the last saved frequency.
Fully extend the telescopic antenna for shortwave (SW) and FM. For AM/MW reception, the radio relies heavily on its internal ferrite bar, so rotating the physical body of the radio can drastically improve the signal.
Change the modulation type. Pressing this switches between AM, USB (Upper Sideband), LSB (Lower Sideband), and CW (Continuous Wave/Morse Code).
For Single Side Band (LSB/USB), use the BFO control to fine-tune the signal for clarity.
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Used for ham radio operators. To select modulation, use the mode button (or BFO button). Bandwidth: The BFO knob allows for selectable filters ( ) to improve audio quality. 3. Power & Hardware Battery: Internal lithium battery (typically hours runtime). Charging: USB-C connector on the rear.
Modern homes are filled with Radio Frequency Interference (RFI) from Wi-Fi routers, LED bulbs, and laptop chargers. For the best DXing (long-distance listening) experience, take your ATS-20 outdoors to a park, backyard, or open field away from power lines. 6. Troubleshooting Common Issues
Press the button until you see LSB (Lower Sideband) or USB (Upper Sideband) on the screen.
The built-in BNC connector allows you to connect superior external antennas: Toggle it to the "ON" position
Briefly press the rotary encoder knob once (or press the dedicated "VOL" button if your variant features one). The display will highlight the volume indicator.
For fast scanning across a band, choose a larger step size (e.g., 10 kHz or 100 kHz).
Avoid operating the radio while charging from a noisy USB power brick, as it will introduce intense static (RFI) into your reception. 5. Antenna and Reception Tips for Shortwave & SSB
The interface typically consists of a primary rotary encoder (tuning knob) and several front-panel buttons: Button/Control Primary Function SSB Mode Function VOL+ / VOL- Adjusts speaker/headphone volume. BAND+ / BAND- Cycles through preset frequency bands (FM, MW, SW, LW). Switches modulation: FM, AM, LSB, USB. Cycles through tuning increments (e.g., 1kHz, 5kHz, 10kHz). Adjusts BFO fine-tuning. For AM/MW reception, the radio relies heavily on
Short-press the inward. A speaker icon or volume level indicator will flash on the OLED screen. Rotate the knob to find a comfortable audio level.
The “manual” in the photos was a grainy, low-resolution JPEG of a single page of Chinese text, already watermarked by three different resellers. Elias, a man who liked to read instructions for toasters cover to cover, felt a prickle of unease.
Used to recharge the internal battery via a standard 5V USB power source.
To help customize your setup, tell me you want to listen to most. I can also provide details on how to upgrade the firmware or recommend the best external antennas for your budget. Share public link
buttons to cycle through FM, AM, LW, and the various Shortwave (SW) bands. Mode Button : Cycles through modulation types: (Upper Sideband), and
Flip the physical power switch located on the side panel to the position.