These radios are constantly evolving. If your menu looks different from the manual, you might be on an older firmware. You can find the latest update tools and drivers at Harduino's Download Center to add features like HF-FAX or improved Morse decoding.
Adjustable filters ranging from 0.5 to 4.0kHz for SSB and up to 6kHz for AM. ats-25 radio manual pdf
The multi-function rotary encoder on the front panel adjusts frequencies and navigates menus. Pressing the knob inward acts as a "Select" button or changes the tuning step size. These radios are constantly evolving