Ats-20 Radio Manual <REAL>
Controls how "wide" the receiver listens. This is a DSP filter simulation.
The ATS-20 is not a traditional analog radio; it is a Software Defined Radio (SDR) based on the SI4735 DSP chip. Unlike older radios that use coils and tuning capacitors, the ATS-20 processes signals mathematically.
Use the Band- and Band+ buttons.
ATS-20 Si4732 Radio Receiver: The Ultimate User Guide The ATS-20 (Si4732) has become a favorite among radio enthusiasts for its portability and impressive range. Whether you are a seasoned "ham" or a newcomer to shortwave listening, this guide serves as your comprehensive ATS-20 radio manual to help you master its features. 1. Getting Started
Before diving into the frequencies, ensure your device is ready:
Charging: Most units use a Mini-USB or USB-C port. A red LED usually indicates charging, turning off or green when the 3.7V lithium battery is full.
Antenna: Screw the telescopic antenna into the BNC connector. For better HF (High Frequency) reception, consider using an external long-wire antenna. 2. Controls and Layout
Encoder Knob: This is your primary tool. Rotate it to change frequencies or navigate menus. Press it to confirm a selection.
Power Switch: Usually located on the side or back to toggle the unit on/off. ats-20 radio manual
Volume: Adjust using the dedicated knob or through the digital interface (depending on your specific firmware version). 3. Selecting Modes and Bands
The ATS-20 covers a massive range including FM, AM, and SSB. Use the Bands menu to cycle through: FM: Standard broadcast radio (64–108MHz). MW (Medium Wave): Standard AM radio. SW (Shortwave): 1.7MHz to 30MHz.
LSB/USB (Lower/Upper Sideband): Essential for listening to amateur radio operators on HF bands. 4. Tuning and Steps
To change your tuning speed, press the Step button (or encoder). Common increments include: 1kHz / 5kHz: Best for AM/MW scanning. 100kHz: Fast scrolling through FM. 10Hz / 100Hz: Critical for "clarifying" voices in SSB mode. 5. Advanced Features
Bandwidth (BW): You can adjust the filter width to cut out interference. Use narrower settings (e.g., 2.0kHz) for crowded SSB bands and wider settings (e.g., 6.0kHz) for high-quality AM.
BFO (Beat Frequency Oscillator): When in SSB mode, the BFO allows you to fine-tune the pitch of the voice to make it intelligible. Rotate the encoder until the "Donald Duck" sound turns into a clear human voice. 6. Menu Settings
By accessing the internal menu (usually a long press of the encoder), you can: Adjust Brightness: Save battery by dimming the OLED screen. Scan: Automatically search for the next strongest station. Mute: Quickly silence the audio. Troubleshooting Tips
No Sound on SW? Check your gain settings and ensure you are outside or away from electronic interference like LED bulbs or PC power supplies. Controls how "wide" the receiver listens
Firmware Updates: Many ATS-20 radios run on Arduino-based code. If your device feels "buggy," the enthusiast community often releases updated sketches that improve stability and add features.
Note: Always remember that radio propagation changes with the time of day. Lower frequencies (3–10MHz) usually work better at night, while higher frequencies (15–30MHz) are better during the day.
This guide provides a comprehensive overview of the ATS-20+ Si4732 All Band Radio Receiver Go to product viewer dialog for this item. . The is a compact (approx.
) receiver popular for its capability to tune FM, AM, LW, and Shortwave (SSB) frequencies on a budget. 1. Key Controls & Interface
The device features an OLED display and a set of eight buttons, typically running firmware version 3.0.7g by PU2CLR.
Encoder/TUNE: Rotate to adjust frequency. Pull the encoder to adjust BFO.
BAND+/BAND-: Short press to select bands (FM, AM, LW, SW); long press to browse bands backward.
VOL+/VOL-: Short press to enter volume mode (use encoder to adjust). STEP: Adjust tuning steps ( The ATS-20 is not a traditional analog radio;
BFO/MOD/ATS: In SSB mode, press for BFO regulation. Long press to engage Automatic Tuning System. 2. Operation Modes FM Mode: Operates between . Uses 3.5mm headphone jack for antenna. AM/LW/SW: Covers
SSB (USB/LSB): 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.
Antenna: BNC connector for a telescopic whip antenna or external antenna (highly recommended for shortwave). 4. Quick Fixes & Tips
Wrong Direction Encoder: If the encoder works in reverse, the Arduino sketch needs two numbers swapped, and the firmware reflashed.
Low Volume: Ensure the BFO settings are adjusted properly for SSB, as it can sound low/weak by default.
Weak Signals: For better shortwave reception, use an external wire antenna connected to the BNC input. 5. Troubleshooting
Frozen/Wrong Station: Access the menu via the button and select "EEPROM RESET" to factory default the settings.
No SSB Activity: Ensure the antenna is long enough; a 20-meter wire is recommended for effective Shortwave reception.