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NOISE REJECT ADJUSTMENT
NOTE: When the NOISE REJECT knob is turned clockwise, the amount of the reflected signal
may be slightly reduced. Therefore, turn this knob clockwise only as far as needed to reduce
interference. If there is no interference, this knob can be left in the full counterclockwise position.
NOTE: The Humminbird In-Dash Sixty is the only model with a NOISE REJECT system built in.
Start the boat motor and look for a flashing, moving pattern that covers the circumference of the
dial (see indication D). If these flashes cannot be sufficiently reduced by turning the NOISE
REJECT knob clockwise, reposition the transducer and cable away from the motor to obtain a
minimum number of interference flashes. Then turn the NOISE REJECT knob as far clockwise as
is necessary to reduce the interference. If the interference still cannot be sufficiently reduced,
contact the motor manufacturer for information on reducing ignition interference.
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