Wait for the "Upload Successful" prompt. The radio will reboot into a completely revised, high-performance interface. 6. Troubleshooting and Maintenance Reference
Drop the BW to 1.0kHz or 2.0kHz. The audio will sound muddy, but you will be able to copy the voice through the noise.
Press the (Bandwidth) button to narrow or widen the receiver filters:
Because the ATS-20 is based on the open-source Arduino and Si4732 architecture, the factory firmware is often barebones. Many users flash alternative firmware versions (such as the popular community mods by PU2CLR or specialized Russian firmware packs). ats20 radio manual better
Use this matrix to quickly resolve operational failures on modified or stock ATS-20 receivers. Probable Cause Actionable Correction BFO (Beat Frequency Oscillator) offset is misaligned.
Set bandwidth to 4.0 kHz or 6.0 kHz for optimal audio fidelity.
is more than just a toy. It is a capable, portable tool for the modern radio enthusiast. By understanding the interaction of the BFO, AGC, and bandwidth controls, and by experimenting with external antennas, you can turn a budget radio into a high-performance receiver. If you are looking to purchase one, you can find the Go to product viewer dialog for this item. on Amazon or on eBay. If you'd like, I can: Wait for the "Upload Successful" prompt
This knob changes frequencies, navigates menus, and selects options. It also clicks inward (acts as a button) to switch tuning steps.
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.
Matching your bandwidth filter to the target signal drastically improves readability: Troubleshooting and Maintenance Reference Drop the BW to 1
If you want to listen to Ham Radio operators, you must switch to or LSB (Lower Sideband) . Find the frequency (e.g., 7.175 MHz for 40m ham band). Switch mode to LSB. Press the BFO button.
One of the best aspects of the ATS-20 is that the firmware is open-source.
Press and hold the Encoder Knob for three seconds. This toggles the key lock feature on or off to prevent accidental button presses in your pocket.
When listening to amateur radio operators on USB or LSB, voices may sound robotic or high-pitched. Activate the setting.
Before powering on the device, understanding the physical interface prevents configuration errors. Front Panel Interface