Mastering Your ATS-20: Why This Budget Radio Is Better Than You Think The ATS-20 (SI4732) All-Band Radio has become a cult favorite in the hobbyist community. While it’s often marketed as a budget-friendly entry into shortwave listening (SWL), many users find the "out of the box" experience a bit confusing due to sparse or poorly translated documentation. If you’re looking for a better ATS-20 manual and a guide to unlocking its full potential, you’re in the right place. Here is how to master your device and why it punches far above its weight class. 1. Understanding the Interface The ATS-20 uses a minimalist design, which is great for portability but can lead to a "button-mashing" frustration. The core of the experience is the rotary encoder (the main knob). The Knob Click: Most users don't realize the tuning knob is also a button. Short-pressing the knob usually cycles through tuning steps (1kHz, 5kHz, 10kHz, etc.). This is vital for navigating from a broad scan to fine-tuning a specific SSB (Single Sideband) signal. The "BFO" Setting: For Amateur Radio (Ham) listening, the Beat Frequency Oscillator (BFO) is your best friend. When in USB or LSB mode, use the BFO adjustment to "clarify" voices that sound like Donald Duck. 2. Why the ATS-20 is "Better" with an External Antenna The stock telescopic antenna is fine for local FM stations, but if you want to hear signals from across the ocean, you need to upgrade. The Impedance Issue: The ATS-20’s input is designed for high-impedance antennas. Adding a simple 20-foot "long wire" attached to the telescopic antenna with an alligator clip will instantly transform your reception. Noise Floor: Because the ATS-20 is an SDR-based (Software Defined Radio) device, it is sensitive to RFI (Radio Frequency Interference). Using it away from computers and LED light transformers will make the audio quality significantly better . 3. Essential Shortcuts & Navigation Forget the confusing diagrams; here is the simplified logic for the ATS-20 firmware: Band Selection: Use the 'BW' (Bandwidth) button to cycle through filters. For clear AM, use 4-6kHz. For crowded Shortwave or SSB, drop it down to 2.2kHz or 1.2kHz to cut out adjacent interference. The Mode Toggle: Use the 'Mode' button to switch between FM, AM, USB, and LSB. Remember: Most Ham operators below 10MHz use LSB , and those above 10MHz use USB . 4. Improving the Audio: The Speaker Mod One of the most common complaints in the manual is the "tinny" sound. The ATS-20 has a decent internal amplifier, but the built-in speaker is often its weakest link. Pro Tip: Plugging in a pair of wired headphones or a small external PC speaker bypasses the internal speaker's limitations, providing much better fidelity and making weak signals easier to understand. 5. Firmware: The Secret to a "Better" Radio Many ATS-20 units ship with "standard" firmware. However, there are community-developed versions (often based on the PU2CLR library ) that add features like: An on-screen RSSI (Signal Strength) meter. Smoother scanning speeds. Extended frequency ranges. If you are tech-savvy, flashing the latest firmware via the USB port is the single best way to make the ATS-20 feel like a premium piece of gear. Summary Table: Quick Reference How to Optimize Tuning Click the knob to change steps Faster navigation SSB Voice Adjust BFO increments Clearer Ham radio audio Interference Lower the Bandwidth (BW) Less background noise Reception Attach a "Long Wire" antenna Worldwide signal reach The ATS-20 is a powerful tool disguised as a toy. By understanding these manual "hacks," you turn a $40 device into a high-performing receiver that rivals radios triple its price.
Go to product viewer dialog for this item. Go to product viewer dialog for this item. are popular, low-cost "all-band" radio receivers powered by the Si4732 chip . Because these are often sold by various generic manufacturers, a formal manual is rarely included, and the out-of-the-box experience can be confusing for beginners. Essential Controls & Layout Encoder (Main Knob) : Rotate to tune frequency; press and hold to enter menu settings like brightness or BFO (Beat Frequency Oscillator). Band Up/Down : Cycles through 22 pre-configured bands, including FM, Longwave (LW), Medium Wave (MW), and various Shortwave (SW) bands. Step : Changes the tuning increment (e.g., 1kHz, 5kHz, 10kHz). BW (Bandwidth) : Selects filter widths (0.5, 1, 1.2, 2.2, 3, or 4kHz) to improve signal clarity or reduce interference. Mode : Switches between FM, AM, USB (Upper Sideband), and LSB (Lower Sideband). AGC : Toggles Automatic Gain Control on or off to stabilize signal strength. Getting Better Reception Antenna Switch : On the side or rear, ensure the switch is set correctly for your mode (e.g., toggle to "AM/SSB" when listening to shortwave). External Wire : While it includes a telescopic antenna , adding a simple 20–30ft wire via the BNC connector significantly boosts performance. Fine Tuning SSB : When listening to "Ham" radio (SSB), use the BFO adjustment (accessed by clicking the encoder) to clarify voices that sound like "Donald Duck". Advanced: Improving the Experience Many users find the stock firmware limited or buggy. You can upgrade the firmware to the popular Goshante or ATS_EX versions via the USB-C/Micro-USB port using the Arduino IDE. These updates often add: Memory storage for favorite stations. Improved RDS (Radio Data System) for FM. Better S-meter accuracy for signal strength. Lets upgrade the ATS 20+
Since the official ATS-20 and ATS-20+ documentation is often limited, enthusiasts typically rely on community guides and firmware-specific documentation to get the best performance. Quick Start Guide Initial Setup : 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. Switching Bands : Short press the BAND+ button to enter selection mode, then rotate the encoder knob to choose your desired band (FM, AM, LSB, USB, etc.). Fine Tuning : Use the Step button to select your tuning increment, then rotate the TUNE/BFO knob to dial in the frequency. Advanced Features & "Hidden" Settings Many units come with or can be upgraded to Goshante's ATS_EX firmware or similar versions, which unlock deeper settings: Soft Mute (SM) : Adjustable from 0–32; lower values reduce the "chuffing" silence between tuning steps but may increase noise while rotating the knob. Sync Mode (Syn) : Can be enabled for SSB to help stabilize reception of shifting signals. Bandwidth (BW) : Press the BW button to cycle through filters; narrower settings help reduce interference from nearby stations. Essential Tips for "Better" Performance The "Hand" Effect : The radio's sensitivity often drops when you set it down. A common fix is using a BNC-to-banana adapter with external copper wires to act as a simple dipole antenna, which reduces noise interference. Power Source : Use battery power whenever possible. Charging while listening often introduces significant mains hum and electronic noise into the receiver. Documentation : If you need a more detailed English manual, many users recommend the ATS-20+ Advanced Firmware User Manual for detailed button maps and setting definitions. Lets upgrade the ATS 20+
Mastering the ATS-20: A "Better" Manual and User Guide The ATS-20 and its upgraded sibling, the ATS-20P , have become staples in the hobbyist community due to their low cost and impressive all-mode capabilities (SSB, CW, AM, FM). However, anyone who has unboxed one of these Chinese imports knows the frustration of the included instruction manual. Often poorly translated, vague, or factually incorrect, the standard manual leaves many users confused about how to actually operate the device. If you are looking for a "better manual," you aren't looking for a different booklet—you are looking for operational clarity. This guide serves as a practical, plain-English supplement to the factory manual to help you get the most out of your radio. ats20 radio manual better
Part 1: The Hardware Reality Check Before diving into menus, ensure your hardware is set up for success. The official manual glosses over the importance of impedance matching.
The Antenna Issue: The ATS-20 has a high-impedance input. If you connect a standard 50-ohm Ham radio antenna, you may find performance lacking. This radio performs best with long wire antennas (specifically "random wire" antennas). The BNC Adapter: Most units ship with a BNC connector. Using a BNC-to-Alligator-Clip adapter allows you to connect a long wire thrown over a tree or out a window, which drastically improves SW reception compared to a telescopic whip.
Part 2: Navigating the Interface (The "Missing" Instructions) The front panel can be intimidating, but it follows a specific logic once you understand the "Short Press" vs. "Long Press" mechanics. 1. The Encoder Knob (The Main Dial) Mastering Your ATS-20: Why This Budget Radio Is
Short Press: Toggles between Volume and Frequency adjustment. Note: This is the most common question new users have. If your volume is stuck, short-press the knob to switch it back to volume mode. Long Press (2-3 seconds): Enters the Menu System .
2. Mode Selection (The Side Buttons) The buttons labeled SSB, CW, AM, and FM change the detection mode.
SSB (Single Side Band): This is where the ATS-20 shines. Here is how to master your device and
Use LSB (Lower Side Band) for listening to 160m and 80m amateur radio bands. Use USB (Upper Side Band) for 40m, 20m, and shortwave broadcasts. Tip: If voices sound like "Donald Duck," you are on the wrong sideband or your frequency is slightly off.
3. The Menu System When you long-press the encoder knob, you enter the configuration menu. The factory manual often fails to explain what these settings actually do. Here is the translation: