Front-end overloading from strong local commercial FM transmitters.
The standard factory firmware can feel clunky. Upgrading to popular community firmware mods (such as those by PU2CLR or Harduino) unlocks features like: Improved SSB fine-tuning increments. Better battery level visualization. Custom memory bank management. Enhanced scanning speeds.
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
: Use battery power whenever possible. Charging while listening often introduces significant mains hum and electronic noise into the receiver. Documentation ats20 radio manual better
The SI4732 chip features a dedicated BFO (Beat Frequency Oscillator) for clear SSB voice and Morse code (CW) reception.
This article serves as your guide. We are going to make the manual obsolete. By the end of this guide, you will know how to navigate the menu, master hidden features, and troubleshoot common issues better than 99% of other users.
: Toggles modulation formats: FM, AM, USB (Upper Sideband), and LSB (Lower Sideband). SSB modes are critical for amateur radio and utility transmissions. Better battery level visualization
To listen to local commercial radio, press the keys until "FM" appears. Spin the Encoder Knob to navigate to your favorite station. 2. Mastering Shortwave and Ham Radio To explore Shortwave (SW) or Amateur Radio bands:
Default settings are designed for general use. For superior performance, consider these adjustments: A. Antenna Selection
The ATS20 runs on 5V DC via USB-C. However, it is . If you plug it into a cheap phone charger, you will hear digital buzzing across all frequencies. consider these adjustments: A.
: Attach the rubber feet for stability, screw the telescopic antenna into the "ANT" port, and charge via the USB Type-C port until the LED indicator changes.
Enter fine-tuning mode via [STEP] button; adjust frequency by +/- 10Hz steps until voice becomes natural.