Gibson Electric guitar Owner's Manual page 47

Function MCK Position
Global Enter Setup Mode
Calibration turn to LED C and
Offset press display once
On / Off
Display LEDs Action
LED C shining blue, Turn MCK left
Peg LED shines white (Counterclockwise)
to switch off
Global Calibration
red B LED
indicates OFF
Turn MCK left
(clockwise) to
switch on Global
Calibration green
LED indicates ON
Press Enter to
store
45
Remarks
When a Calibration
Mode is in effect,
your selected
fundamental
frequency will now
apply to all your
presets