Gibson Electric guitar Owner's Manual page 35

Function Display LEDs
Reference Tuning I LED shining red
(Tune to selected
reference pitch)
MCK Position
Pull MCK out and
turn to I LED
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Action
Pull out (disengage) the
peg of the Powerhead
you choose to tune to a
reference pitch. Now
tune this string to
match your chosen ref-
erence. Push peg back
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into engaged position.
Begin tuning your guitar
by pressing the display.
The letter "I" will shine
green and ALL string
LEDs will shine red.
Remarks
Strum the SAME string you have just tuned to your
reference pitch. When this string's LED shines solid
green its frequency has been measured and stored.
Now strum all strings, and the Powertune system will
tune your guitar to 'normal tuning' based on your
chosen reference string. (LEDs will behave the same
as during normal tuning.) When the reference tuning
is achieved, the "I" will flash on and off in blue.
Should you wish to store your new 'Reference Tuning,'
simply turn the MCK to one of the factory preset
positions (E, A, D, G, B, or e) and press the display
once. The display LEDs will flash blue 3 times to
indicate your new Reference Tuning has been stored
at that position, and can be recalled in the same
manner as any other preset by choosing that position.
(Remember that you don't have to "store" your new
Reference Tuning. Simply push the MCK back into
normal position and you are ready to go!)
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