JLCooper MCS3 9 Pin - Manual (Page 7)

7
Jog Mode
The center wheel is for Jog mode. In Jog mode, playback
speed and direction is proportional to the speed and direction
that the wheel is rotated.
Rotate the wheel clockwise for forward playback.
Rotate the wheel counter clockwise for reverse playback.
In Jog mode, continuously rotating the wheel results in 1X play
speed, either forward or backward.
To stop the tape, simply stop turning the wheel.
Shuttle Mode
The outer ring is for Shuttle mode. In Shuttle mode, playback
speed is related to the extent of rotation away from the starting
position of the wheel.
Rotate the ring clockwise for forward shuttle.
Rotate the ring counter clockwise for reverse shuttle.
The program continues to shuttle until the ring is returned to
its center position. Alternately, simply press Stop.
Shuttle LEDs
Normally, on power up, the shuttle ring LEDs will not light
until the shuttle ring is centered.
After that, the shuttle ring LEDs will light depending upon the
direction of rotation from center. Both LEDs are on when the
ring is centered.