Thank you for purchasing the ATS-20. This compact, software-defined radio (SDR) receiver is based on the Silicon Labs Si4732 DSP chip. It offers wide frequency coverage, multiple modulation modes, and high sensitivity in a portable form factor.
Adjust from 0 to 32 to reduce background static between stations.
Switches the modulation type. Press this to cycle through FM, AM, USB (Upper Sideband), and LSB (Lower Sideband). Sideband modes are essential for listening to ham radio operators.
Locate the internal USB-to-Serial programming interface (or use the external USB port if your specific clone revision supports direct data transfer). Connect the radio to your PC.
Within this menu, rotating the encoder highlights options, and clicking the encoder selects them. You can calibrate the internal crystal oscillator (XTAL correction) here to correct frequency drifting on high-frequency bands. 3. Optimizing Shortwave and SSB Reception ats20 radio manual better
Connect the shield portion of the BNC connector to a true earth ground (like a cold water pipe). This drops the local RF noise floor by up to 20 dB. Internal Shielding Retrofit
Which (Shortwave, AM/FM, or Ham Radio) you listen to most?
The default firmware often lacks robust memory storage, but custom firmware can add these features.
The ATS-20 (Si4732 version) is a fantastic little radio for hobbyists. Here’s why I recommend it: Thank you for purchasing the ATS-20
This article serves as a "better" manual, offering a comprehensive guide to operating, configuring, and upgrading your radio to unlock its full potential. Table of Contents Understanding the Core Operating Functions (How to Use) Advanced Tuning & SSB Operation Hidden Features & Firmware Upgrades Performance Tips: Making It Better 1. Understanding the The
Ensure you are not deep inside a concrete or brick building. Computers, LED lights, and phone chargers emit massive amounts of RF interference. Step outside or away from electronics, and ensure you are searching during optimal propagation times (e.g., lower frequencies like 3MHz–7MHz work best at night; higher frequencies work best during the day).
: You can cycle through step sizes (1, 5, 9, 10, 50, 100k, and 1M) for faster or more precise tuning by pressing the BFO Control : Use the main knob in SSB mode to adjust the Beat Frequency Oscillator (BFO)
To listen to different types of broadcasts, you must select the correct mode. Adjust from 0 to 32 to reduce background
Expanded frequency ranges (including the Airband/VHF bands on supported hardware variations). Better memory management and station scanning capabilities.
Changes the Bandwidth filter. In AM/SW mode, you can cycle through widths like 1.0kHz, 2.0kHz, 3.0kHz, 4.0kHz, and 6.0kHz. Narrower filters block adjacent interference; wider filters sound clearer.
Press the button repeatedly to choose your broad spectrum (e.g., SW for shortwave). Rotate the Encoder Knob to scroll through the frequencies.