Ats-20 Radio Manual May 2026

The ATS-20 radio is a popular, compact, and versatile shortwave radio receiver. Here's some general information about it:

The ATS-20 radio manual typically covers various aspects of the radio's operation, features, and specifications. Here are some key points that are often included:

Key Features:

Shortwave radio receiver with AM, FM, and SSB (Single Side Band) capabilities
Frequency range: 150 kHz to 30 MHz
Compact and portable design
Low power consumption
Can be powered by batteries or an external power source

Operating Instructions:

Setting up the radio: This includes connecting the antenna, adjusting the volume, and selecting the desired mode (AM, FM, or SSB)
Tuning into stations: The manual explains how to use the tuning dial to find and select stations
Adjusting settings: This includes setting the frequency, mode, and other parameters

Specifications:

Frequency range: 150 kHz to 30 MHz
Modes: AM, FM, SSB
Sensitivity: Typically around 10-20 μV
Selectivity: Typically around 30-50 dB
Power consumption: Typically around 1-2 watts

Troubleshooting:

The manual often includes a troubleshooting section to help users diagnose and resolve common issues, such as:
- No reception or poor reception
- Interference or noise
- Incorrect frequency display

Additional Information:

The manual may also include information on:
- Antenna recommendations
- Operating tips and best practices
- Maintenance and repair procedures

If you're looking for a specific ATS-20 radio manual, I can suggest some possible sources:

The manufacturer's website or documentation
Online archives or libraries (e.g., archive.org)
Radio enthusiast communities or forums
eBay or other online marketplaces (for purchasing a physical copy of the manual)

, and its successor the , are compact, high-performance all-band radio receivers designed for shortwave listeners (SWL) and radio hobbyists. Built around the powerful SI4732 DSP chip and driven by an Arduino-based

platform, these radios offer sophisticated features like Single Sideband (SSB) reception in a pocket-sized aluminum case. Core Technical Specifications

The device is prized for its versatility, supporting a wide range of broadcast and amateur bands: Frequency Range:

Covers FM (76–108 MHz), Longwave (150–510 kHz), Medium Wave (520–1720 kHz), and Shortwave (1.7–30 MHz). Demodulation Modes:

Supports FM, AM, and SSB (both Upper Sideband/USB and Lower Sideband/LSB). Selectivity:

Features adjustable audio bandwidth filters (0.5, 1, 1.2, 2.2, 3, and 4 kHz) to help isolate weak signals.

Equipped with a 0.96-inch OLED display, a built-in 3.6V lithium battery, and a BNC or SMA antenna interface. Operational Guide Summary

While official paper manuals are often scarce or briefly included, the device follows an intuitive interface:

ATS-20 Shortwave Radio: The Unofficial User Manual The ATS-20 (SI4732 based) receiver has become a favorite among hobbyists for its portability, affordability, and surprisingly wide frequency coverage. However, because these radios often arrive with minimal or poorly translated documentation, getting started can be a bit of a puzzle.

This is a comprehensive, deep-dive manual for the generic ATS-20 / ATS-20P / ATS-25 series of All-Band Radio Receivers.

Because these devices are manufactured by various Chinese OEM brands (like C.Crane, Hanfong, or unbranded), official documentation is often sparse. This guide covers the hardware architecture, menu navigation, hidden features, and troubleshooting based on the standard SI4735/DSP chipset architecture used in these units.

Battery & Charging

Insert one unprotected flat-top 18650 (positive terminal up).
Charge via USB-C → red LED on. Green LED = fully charged (~4–6 hours).
⚠️ Do not use fast chargers (QC/PD) – use a standard 5V/1A adapter.

1. Step (Tuning Rate)

This determines how far the frequency jumps when you turn the knob.

FM: Usually set to 100kHz.
AM/SW: Variable.
- Tip: Use 5kHz or 10kHz for SW Broadcast stations.
- Tip: Use 1kHz or 100Hz for fine-tuning SSB/Ham radio voices.

3. Soft Mute / Muting

Many ATS-20 units ship with "Soft Mute" enabled. This silences the audio when no strong signal is present, creating an annoying "pumping" sound.

Deep Menu Fix: In some firmware versions, you

Finding a comprehensive official manual for the ATS-20 all-band radio receiver can be difficult as it is often sold under various generic brands without detailed documentation. ATS-20+ / V2 Quick Start Guide

The ATS-20 (and its updated ATS-20+ variant) is a portable full-band radio receiver based on the SI4732 chip.

Frequency Bands: Supports FM, AM (MW and SW), and SSB (LSB and USB). Controls: BFO Control: Used to clear up voice signals in SSB mode. Frequency Steps: Switchable between 1, 5, and 10 KHz steps.

Audio Filters: Adjustable bandwidth filters (0.5, 1, 1.2, 2.2, 3, and 4 KHz).

Charging: Powered by a 3.6V 800mAh polymer lithium battery, rechargeable via a standard USB port.

Audio Output: Includes a 3.5mm earphone jack and supports a 4-ohm or 8-ohm speaker. Manual Resources

Since official PDFs are rare, users often rely on documentation for similar models like the ATS-25, which shares many firmware functions. ats-20 radio manual

Community PDF: A community-shared H-RADIO User Manual (PDF) for the ATS-25 is often used as a reference for ATS-20 firmware.

Firmware Updates: Many ATS-20 units can be updated using ESP32 flash tools to add features like better band scanning or refined SSB controls. Common Troubleshooting

Missing FM Mode: If the radio won't enter FM, check the band switch button; sometimes it requires a firm or repeated press to cycle through to FM.

Antenna Issues: For FM, the standard telescopic rod antenna is generally better than internal traces, which can introduce noise from the unit's electronics.

ATS-20 radio manual is less of a rigid instruction booklet and more of a gateway into a vibrant "tinkerer’s paradise"

. While the physical device is a compact, aluminum-cased receiver, its true power lies in its open-source Arduino-based firmware

, which allows users to completely rewrite how the radio functions. Key Functions and Controls The radio features a minimalist layout centered around a 0.96-inch OLED display and several multi-function buttons: TUNE/BFO/ATS Knob

: A multi-function rotary encoder used to sweep through frequencies. In Single Sideband (SSB) mode, it fine-tunes the Beat Frequency Oscillator (BFO) to clarify voice signals. Bandwidth (BW) : Cycles through audio filters ( ) to cut through interference and static. Automatic Gain Control (AGC)

: A critical toggle for preventing strong signals from overloading the sensitive Si4732 chip. Step Selection : Allows you to jump between frequency increments of The "Interesting" Twist: Manual as a Living Document

What makes the ATS-20 manual unique is that the "factory" version is often just the beginning. Many enthusiasts find the original firmware's fonts too small or the tuning too clunky.

The ATS-20 (and its successor, the ATS-20+) is a popular, low-cost "all-band" radio receiver based on the Si4732 DSP chip. Because many of these units are sold as kits or generic imports, a physical manual is often missing from the box.

Below is a functional guide to operating the radio based on standard firmware. 📻 Quick Start Guide

Antenna: Connect the provided telescopic antenna to the BNC/SMA jack.

Power: Flip the Toggle Switch (usually on the back or side) to ON.

Mode Switch: If your unit has a physical FM/AM switch on the back, set it to the desired band before tuning.

Tuning: Rotate the large Encoder Knob to change the frequency. Primary Controls & Functions

BAND+ / BAND-: Cycles through pre-configured bands: FM, LW, MW, and various SW (Shortwave) segments. VOL+ / VOL-: Adjusts the volume level (typically 0–63).

MODE: Switches between modulation types: AM, LSB (Lower Sideband), USB (Upper Sideband), and FM.

STEP: Changes the tuning increment (e.g., 1kHz, 5kHz, 10kHz). This is vital for fine-tuning SSB signals.

BW (Bandwidth): Cycles through audio filters (0.5, 1, 1.2, 2.2, 3, and 4 kHz) to reduce interference from nearby stations.

AGC (Auto Gain Control): Toggles gain modes to stabilize signal strength. 🛠️ Advanced Operations

I have an ATS-20 and I cannot get it to enter FM Mode.I ... - Facebook

and its upgraded sibling, the , are compact, budget-friendly DSP receivers based on the Si4732 chip and Arduino Nano architecture

. Because these radios are often sold under various generic brands with differing firmware versions, their operation can vary slightly. Core Controls & Operation Tuning/Encoder Knob

: Rotate to change frequencies. Press the knob (on most firmware) to switch between tuning steps (e.g., 1kHz, 5kHz, 10kHz) or to enter specialized modes like

(Beat Frequency Oscillator) adjustment for fine-tuning SSB signals. Band Selection

buttons to cycle through FM, AM, LW, and the various Shortwave (SW) bands. Mode Button : Cycles through modulation types: (Upper Sideband), and The ATS-20 radio is a popular, compact, and

(Lower Sideband). SSB (USB/LSB) is essential for listening to ham radio operators. Step Button

: Selects the frequency increment. Short presses typically cycle through standard steps, while a long press in some versions might display a signal strength bar. BW (Bandwidth)

: Adjusts the filter width to reduce noise or interference from adjacent stations. Key Features for Shortwave/SSB BFO Calibration

: In USB or LSB mode, press the tuning knob to activate BFO. This allows for ultra-fine adjustments (often in 10Hz or 20Hz steps) to clarify "Donald Duck" voices in SSB transmissions. AGC (Auto Gain Control)

: Press to toggle gain settings, which helps stabilize signal strength for clearer audio. Firmware Upgrades

Many users recommend flashing the radio with advanced firmware to unlock better performance and features: PU2CLR Library

: The foundational library for many versions, improving overall chip control. ATS_EX (Goshante Firmware)

: A popular "advanced" firmware that adds a cleaner interface, better battery monitoring, and removes "chuffing" (the brief audio mute when tuning). How to Flash : Most units connect to a PC via . You can use tools like Arduino IDE to upload new Quick Troubleshooting EEPROM Reset

: If the radio behaves strangely after a firmware flash, turn it on while holding the encoder button down to reset the memory to defaults. Antenna Performance : While the included telescopic whip is decent for FM, an external wire antenna

is highly recommended for picking up weak Shortwave or SSB signals. Are you interested in instructions for flashing a specific firmware version like Goshante or PU2CLR?

The ATS-20 (and the upgraded ATS-20+) is a portable full-band radio receiver based on the SI4732 chip. Official printed manuals are rarely included in the box, and users typically rely on community-shared PDFs or manuals for similar firmware (like the H-RADIO/ATS25 manual). Quick Start & Core Functions

Most ATS-20 units use a rotary encoder and a few tactile buttons for navigation.

Power: Usually a physical toggle switch or a long-press on the encoder.

Band Selection: Press the Band button or the rotary encoder to cycle through pre-configured bands (FM, AM, MW, SW, and SSB).

Tuning: Turn the rotary knob. Pressing the knob often changes the Frequency Step (1kHz, 5kHz, 10kHz).

SSB/BFO: For Single Side Band (LSB/USB), use the BFO control to fine-tune the signal for clarity.

Bandwidth: You can cycle through audio bandwidth filters (0.5, 1, 1.2, 2.2, 3, and 4kHz) to reduce noise. Key Specifications

Display: 0.96" OLED showing frequency, signal strength, and settings.

Battery: Internal 3.6V 800mAh lithium battery, rechargeable via USB.

Audio: Supports 3.5mm earphones or an 8-ohm/1.5W internal speaker.

Antenna: Uses an SMA interface; many users find the stock telescopic antenna is best for FM, while wire antennas help with shortwave (SW). Community & Troubleshooting

Because the firmware is often open-source (based on Arduino/ESP32), many users update their devices to gain new features like Bluetooth or better SDR capabilities.

Missing Manuals: If your unit arrived without instructions, the ATS20/ATS25 Facebook Community is the primary hub for downloading the latest English PDF manuals and firmware updates.

Firmware Flashing: Updating the firmware (e.g., using ESPFlashDownloadTool) can fix bugs or add "Pro" features like AIR band reception. im looking for ATS-20 Diagram

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. Shortwave radio receiver with AM, FM, and SSB

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 (

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.

ATS-20 Radio Manual: A Comprehensive Guide

The ATS-20 radio is a popular, compact, and versatile two-way radio that has gained a significant following among outdoor enthusiasts, emergency responders, and communication professionals. In this article, we'll take a closer look at the ATS-20 radio manual, covering its key features, operating instructions, and troubleshooting tips.

Overview of the ATS-20 Radio

The ATS-20 radio is a handheld, FM two-way radio that operates on the 20-meter amateur radio band. It is designed to provide reliable communication over long distances, making it an ideal choice for camping, hiking, emergency response, and other outdoor activities. The radio is equipped with a range of features, including:

20-meter amateur radio band operation
FM mode
5 watts of output power
16 channels
CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital Coded Squelch) capabilities
VOX (Voice Operated Transmit) functionality
Built-in flashlight

ATS-20 Radio Manual: Operating Instructions

The ATS-20 radio manual provides detailed operating instructions to help users get the most out of their device. Here are some key steps to follow:

Powering On/Off: Press and hold the power button to turn the radio on or off.
Setting the Channel: Use the channel selector button to choose from 16 available channels.
Adjusting the Volume: Use the volume control knob to adjust the audio level.
Transmitting: Press the PTT (Push-To-Talk) button to transmit. Release the button to receive.
Receiving: The radio will automatically switch to receive mode when the PTT button is released.

Advanced Features

The ATS-20 radio manual also covers advanced features, including:

CTCSS and DCS: These features allow users to set specific tones or codes to filter out unwanted transmissions.
VOX: This feature allows users to operate the radio hands-free, using voice commands to transmit.
Flashlight: The built-in flashlight can be activated by pressing and holding the flashlight button.

Troubleshooting Tips

The ATS-20 radio manual provides troubleshooting tips to help users resolve common issues, including:

No Power: Check the battery level and ensure the power button is functioning correctly.
No Reception: Check the antenna and ensure it is properly connected.
Interference: Adjust the CTCSS or DCS settings to minimize interference.

Conclusion

The ATS-20 radio manual is a comprehensive guide that provides users with the knowledge they need to operate and troubleshoot their device. With its range of features, compact design, and ease of use, the ATS-20 radio is an excellent choice for outdoor enthusiasts and communication professionals. By following the instructions and tips outlined in this article, users can get the most out of their ATS-20 radio and stay connected in the field.

Additional Resources

For more information on the ATS-20 radio and its operation, users can consult the following resources:

The official ATS-20 radio manual (available online or through the manufacturer)
Amateur radio online forums and communities
Technical support websites and hotlines

By understanding the features and operation of the ATS-20 radio, users can unlock its full potential and stay connected in a variety of situations.

4. Basic Operation

1. What’s in the Box? (Typical)

ATS-20 radio unit
USB-C charging cable (5V only – do not use fast chargers)
Removable 18650 lithium battery (may be included or sold separately)
Small wire antenna (for shortwave)
User manual (often poorly translated)

Switching Modes (SSB Modulation)

This unit supports Single Side Band (SSB), essential for Ham Radio and Utility stations.

Navigate to the SW band.
Press the Mode button.
Cycle through: AM -> LSB -> USB.
- LSB (Lower Side Band): Common for amateur radio below 10MHz.
- USB (Upper Side Band): Common for amateur radio above 10MHz and utility stations.