Furuno CSH-7 - Manual (Page 10)

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Adjusting Screen Brilliance, Control Panel Backlighting
The BRILL control adjusts screen brilliance, and the DIMMER
control adjusts control panel backlighting.
Lowering the Transducer
Press the d switch. The lamp above the switch blinks, and lights
when the transducer is fully lowered.
CAUTION
Do not exceed speed noted in the speci-
fications when operating the equipment
or lowering or raising the transducer.
The transducer may become damaged.
Do not press the c switch during
lowering of the transducer, and do not
press the
d switch during raising of the
transducer.
The equipment may become damaged.
Selecting a Display Range
Operate the RANGE control to select a display range. The range
selected appears at the top center of the screen.
Setting the Tilt Angle
The tilt angle shows the direction to which the sound wave is
emitted. When the sound wave is emitted horizontally, the tilt
angle is said to be zero degrees and when emitted vertically, 90
degrees.
To set a tilt angle, operate the TILT lever. Watch the tilt angle
indication at the top right corner on the screen. The tilt angle can
be set in one-degree steps from 0 to 55 degrees.
Finding a proper tilt angle is important when searching for fish.
Below are tips for selecting tilt angle.