The ATS-20 (and its successor, the ATS-20+) is a portable, all-band DSP radio receiver based on the Si4732 chip and Arduino Nano architecture. It is popular among hobbyists for its compact size, affordability, and support for SSB (Single Sideband). 1. Key Controls & Button Functions
Charging: Most units use a Mini-USB or USB-C port. A red LED usually indicates charging, turning off or green when the 3.7V lithium battery is full. ats-20 radio manual
“WARNING: ATS-20 contain internal spirit. Do not anger with alkaline battery.” The ATS-20 (and its successor, the ATS-20+ )
Specify which of the following you want next (no questions asked): Key Controls & Button Functions Charging: Most units
(Lower Sideband). SSB (USB/LSB) is essential for listening to ham radio operators. Step Button
References (If producing a manual review for publication, list the specific ATS-20 manual version and any service bulletins or regulatory documents consulted.)