Adjusts the digital filter width. Narrow filters reduce static and interference from adjacent stations; wide filters provide richer audio quality for strong commercial broadcasts.

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.

Type-C USB port used for internal lithium battery charging and firmware flashing. 2. Essential Key Combinations and Menu Navigation

Toggles the audible button feedback or changes the display brightness settings. Step-by-Step Operating Guide 1. Powering On and Basic Tuning