1. Introduction
The HAMGEEK ATS Decoder Mega is an advanced Software Defined Radio (SDR) receiver designed for enthusiasts and professionals. It features a built-in CW and digital mode decoder, a high-sensitivity SI4735D60 chip, and a user-friendly 4-inch color touch screen. Its compact size, durable aluminum housing, and long-lasting internal battery make it suitable for both desktop and portable use, offering reception across AM, FM, SYNC, SSB, CW, and DIGI bands.
2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x HAMGEEK ATS Decoder Mega Receiver
- 1 x Telescopic Antenna
- 1 x WiFi Antenna
- 1 x USB Cable
- 1 x User Manual (this document)
3. Product Features
- Advanced Decoding: Built-in CW and digital mode decoder for versatile signal reception.
- High Sensitivity: Utilizes the SI4735D60 chip for enhanced reception performance.
- Durable Construction: Features a robust aluminum housing with a silver anodized finish, designed to resist scratches and ensure longevity.
- Integrated Battery: Equipped with a 4000 mAh lithium battery for extended portable operation.
- Intuitive Display: A 4-inch color screen with 480 x 320 pixels resolution and touch control for easy navigation.
- Compact Design: Dimensions of 115x85x30 mm allow for convenient mobile use.
- Flexible Charging: Can be charged via any power bank with a USB plug, ideal for outdoor use.
- Quality Audio: Features a pair of stereo speakers providing clear sound with ample volume for various listening environments.
4. Safety Information
Please read and follow these safety guidelines to ensure safe operation and prolong the life of your device:
- Do not expose the device to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or modify the device. This will void the warranty and may cause damage.
- Use only the provided USB cable or a certified equivalent for charging.
- Keep the device away from water and other liquids.
- Ensure proper ventilation when operating the device.
- This product does not contain the AIR band.
5. Setup
5.1 Unpacking
Carefully remove all components from the packaging. Retain the packaging for future storage or transport.
5.2 Connecting Antennas
The ATS Decoder Mega comes with two types of antennas: a telescopic antenna and a WiFi antenna. For general reception, connect the telescopic antenna to the antenna port at the top of the device. For specific applications requiring the WiFi antenna, connect it to the designated port.

Image: The ATS Decoder Mega with the telescopic antenna connected and extended for optimal signal reception.
5.3 Charging the Device
Before first use, fully charge the internal 4000 mAh lithium battery. Connect the provided USB cable to the USB-C port on the side of the receiver and the other end to a standard USB power adapter (not included) or a computer USB port. The charging indicator on the screen will show the battery status.

Image: Side view of the receiver showing the USB-C charging port, along with the tuning knob, power button, and headphone jack.
5.4 Powering On/Off
Press and hold the power button (located on the side, near the tuning knob) for a few seconds to turn the device on or off. The 4-inch color display will illuminate upon power-on.
6. Operating Instructions
6.1 Display Overview
The 4-inch color display provides all necessary information for operation. Key indicators include:
- Frequency: Displays the current receiving frequency in MHz.
- RSSI (dBμV): Received Signal Strength Indicator.
- SNR (dB): Signal-to-Noise Ratio.
- Band: Current frequency band (e.g., FM, AM).
- Mode: Current demodulation mode (e.g., FM, SYNC, SSB, CW, DIGI).
- Battery Indicator: Shows remaining battery life.
- Volume: Current audio output level.

Image: The main display of the ATS Decoder Mega, showing frequency, signal strength, and various operational settings.
6.2 Navigation and Controls
The device features both touch screen controls and a physical gear knob for navigation and adjustments:
- Touch Screen: Tap on the on-screen buttons to select functions, change modes, or adjust settings.
- Gear Knob: Rotate the knob on the side to fine-tune frequency, navigate menus, or adjust volume. Pressing the knob may confirm selections or toggle functions depending on the context.
6.3 Tuning and Modes
The ATS Decoder Mega supports various tuning modes:
- AM (Amplitude Modulation): For standard broadcast radio.
- FM (Frequency Modulation): For standard broadcast radio.
- SYNC (Synchronous Detection): Improves AM reception by reducing fading and distortion.
- SSB (Single Sideband): For amateur radio and utility communications.
- CW (Continuous Wave): For Morse code reception.
- DIGI (Digital Modes): For various digital communication modes.
To change modes, tap the 'MODE' button on the touch screen and select your desired option. Use the 'BAND' button to cycle through available frequency bands.
6.4 Audio Output
The device is equipped with dual stereo speakers for clear audio output. For private listening, connect standard 3.5mm headphones to the headphone jack located on the side of the device.

Image: The bottom of the receiver, clearly showing the grilles for the stereo speakers.
7. Maintenance
Proper care and maintenance will ensure the longevity of your ATS Decoder Mega:
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. For the screen, use a microfiber cloth specifically designed for electronics. Do not use abrasive cleaners or solvents.
- Battery Care: To maximize battery life, avoid fully discharging the battery frequently. If storing the device for an extended period, charge it to about 50% and recharge every few months.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter issues with your ATS Decoder Mega, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low battery; Power button not pressed long enough | Charge the device fully; Press and hold the power button for 3-5 seconds |
| No signal or weak reception | Antenna not connected or extended; Interference; Out of range | Ensure antenna is securely connected and fully extended; Move away from sources of interference; Try a different location |
| Distorted or no audio | Volume too low; Headphone issue; Speaker issue | Increase volume; Check headphone connection or try different headphones; Ensure speaker grilles are not obstructed |
| Touch screen unresponsive | Temporary software glitch | Restart the device by holding the power button until it turns off, then power on again. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Hamgeek |
| Model | ATS Decoder Mega |
| Product Dimensions | 8.5 x 3.5 x 11.5 cm |
| Weight | 450 g |
| Battery | 1 Lithium Ion battery (included), 4000 mAh |
| Display Type | TFT Color Display, 4-inch, 480 x 320 pixels, touch control |
| Connectivity Technology | USB (for charging) |
| Tuner Technology | AM, FM, SYNC, SSB, CW, DIGI |
| Compatible Devices | MP3 Player, Laptop, Tablet, Smartphone (for charging/power bank) |
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Hamgeek customer service directly. Keep your proof of purchase for any warranty claims.