Issue: Constant clicking or buzzing noise on Shortwave bands.
A standard BNC female connector used for attaching the included telescopic antenna or external setups.
Allows you to roll back the receiver's sensitivity manually to clarify strong, overloaded signals. Improving the Antenna System
: 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) ats20 radio manual better
The true power of the ATS-20 lies in its open-source nature. The hardware is built around an Arduino-compatible microcontroller architecture.
The button alters the digital filter width. Choosing the correct width isolates weak signals from background noise.
TROUBLESHOOTING: No reception? → Check antenna, turn off attenuator SSB garbled? → Change sideband, fine tune ±1.5 kHz Encoder jumpy? → Rotate fully 20 times Issue: Constant clicking or buzzing noise on Shortwave bands
Connect a simple 20-to-30-foot copper wire to the center pin of the BNC antenna jack. String it outside or near a window.
: It is highly recommended to turn the radio off and recharge once the battery hits 10% . Draining it completely can cause power-cycling issues that may stress the internal Arduino Nano controller.
the physical power switch (usually located on the back or side near the USB port). Improving the Antenna System : You can cycle
Displays current frequency, band, mode, RSSI (signal strength), volume, and step size.
The stock manual hides the best features. Here are the "secret" functions that make the ATS20 truly powerful.
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