3
1)
The SOT II can automatically set the cents for a Stretch Tuning.
2)
Coarse cent dial can be set up to jump to the nearest five cent increment, for more
accuracy.
GETTING STARTED
When the SOT II is turned on, the SOT II starts in the self-calibrating state for two seconds, two
LEDs will be lit, generally at three and nine o’clock, and then automatically switches over ready to
tune.
The SOT II will be fully charged when received. The Lithium Ion (Li-ion) battery will function for
thirty or more hours before charging is required. This battery is tolerant of deep discharge, and the
SOT II will turn itself off at a safe low-battery voltage, shortly after the Lo Battery LED is lit.
LOW BATTERY INDICATOR
The SOT II indicates the low battery similar to the original SOT, the LED between six and nine
o’clock will remain lit. Shortly after the LO Batt LED is lit, the SOT II will turn itself off to before a
low battery condition can create unstable results.
THE TWO MODES OF OPERATION
The Sight-O-Tuner II has two basic modes of operation:
1)
The TUNE mode.
2)
The Stretch Mode
1)
When the SOT is first turned on, calibration signal will display for two seconds, and then it
enters the TUNE mode.
2)
There is a new button between the COARSE and FINE labels on the face of the SOT. Once you
have measured the stretch number, press the STRETCH button, the partial and cents deviation
for the stretch tuning will automatically be set internally.
THE TUNE MODE
Immediately after exiting from the CALIBRATION mode, whatever the combination of the NOTE,
OCTAVE, FINE and COARSE cents knobs are set to is the pitch that the SOT will be tuning. This is
essentially what you see is what you get, as long as the STRETCH button is NOT LIT.
STRETCH TUNING
The previous Stretch Calculator slide rule is replaced with the ability of the new microprocessor to
set the partial and cents automatically for you. This improvement will make the tuning of a piano
quicker and being able to re-check the tuning almost instantaneous. In this mode, the Sight-O-Tuner
II creates a 41 note tuning that is derived from the measurement of the stretch number from F4 on
the piano being tuned. Every time the note or octave is changed, the computer references the
stretch tuning from the memory and sets the partial and cents deviation correctly for that note.
The new SOT has the stretch tuning curves built in for stretch numbers from 2.0 to 9.0, which
works out to fifteen different stretch curves are built in for automatic setting of the cents knob.