: Adjustable bandwidth filters (0.5, 1, 1.2, 2.2, 3, and 4 KHz).
to enter volume mode, then rotate the encoder. A short press on usually acts as a quick Tuning & Steps : Press the
Because the main rotary encoder handles both tuning and volume, you must shift modes to change audio levels:
At its core, it's a full-waveband radio that leverages the powerful . This tiny chip is the radio's "heart" and does all the heavy lifting for signal reception. The ATS-20 then combines this with an Arduino Nano (ATmega328P) running the show and a crystal-clear 0.96" OLED display for the user interface.
Maya bought an ATS-20 radio for emergency preparedness. It was a sleek, software-defined receiver—digital display, SSB capability, 20-200MHz coverage. But she never read the manual. She just turned the knob until she heard something.
The ATS-20 hadn’t come with a manual. Just the radio itself, a slick slab of black plastic and a tiny, glowing screen, wrapped in a single sheet of bubble wrap. When Elias had ordered it from an online marketplace for forty-seven dollars, the listing had said: “ATS-20 DSP Radio Receiver – Full Band – See photos for manual.”
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