Charge via the USB port until the indicator light changes color. Signal overloading
Keep this guide saved. Share it with other frustrated ATS20 owners. Your radio is capable of hearing Ham operators in Japan, pirates in the Caribbean, and aviation traffic across the continent—provided you use the better manual.
Unlocks frequencies outside standard factory limits.
Smoother acceleration when turning the encoder knob quickly.
Allows free tuning across the entire spectrum using the knob. Memory Mode: Limits tuning strictly to your saved channels. ats20 radio manual better
Press the button to select your desired spectrum (e.g., 40m for amateur radio traffic, or MW for local AM stations).
Connect the shield portion of the BNC connector to a true earth ground (like a cold water pipe). This drops the local RF noise floor by up to 20 dB. Internal Shielding Retrofit
Adjusts the digital filter width. Narrow filters reduce static and interference from adjacent stations; wide filters provide richer audio quality for strong commercial broadcasts.
A physical toggle switch usually located on the back or side panel to completely isolate the battery. Primary Keypad Functions Charge via the USB port until the indicator
Standard rotary potentiometer for audio levels and power.
Changes the frequency stepping increment of the tuning knob. Options usually include 1, 5, 9, 10, or 100 kHz.
Press the button to select your tuning resolution. For sweeping through shortwave, a 5 kHz step is standard. For SSB ham operators, drop it down to 1 kHz. Rotate the encoder knob to find a station. How to Properly Clear Up SSB (Single Sideband) Signals
Located next to the encoder, this controls the analog audio output level. Your radio is capable of hearing Ham operators
If your radio feels sluggish or lacks features like a battery indicator or specific bandwidth filters, look into community firmware updates (such as those by PU2CLR or Ricardo Caratti). Upgrading the firmware via the onboard USB port unlocks: Smoother BFO tuning.
Solution: You are likely inside a concrete or brick building blocking the signals, or near a device causing heavy EMI (like a laptop charger). Move closer to a window, run on battery power rather than USB power, or use an outdoor wire antenna.
If you would like to customize your setup further, let me know: Which you are currently running
0.5, 1.0, 1.2, 2.2, 3.0, and 4.0 kHz for SSB; up to 6.0 kHz for AM