Calibrate Controls (Knobs, Slider, Mod Wheel)

1. Press Edit.
2. Select X1.
3. Select CAL and press Enter.
4. Select CCM and press Enter.
5. Sweep the control (knob/slider) through its full range.
6. Press Enter to store calibration.
7. Press Home to finish.

Source: Xboard 49 — emu-xboard-25-49-61-manual-eng (manual)