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JRC JFV-700HP Instruction Manual: Operations; Basic Operations; Turning Power On/off ([pwr/brt] Control); Adjusting Brightness ([pwr/brt] Control)

Color fishfinder.
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3. OPERATIONS

3.1 Basic Operations

Turning power on/off ([PWR/BRT] control)

ATTENTION
To turn power on, rotate the [PWR/BRT] (power/brightness) control
clockwise.
To turn power off, return the [PWR/BRT] control to the OFF position.

Adjusting brightness ([PWR/BRT] control)

Use the [PWR/BRT] control to adjust brightness.
Brightness can be adjusted to any level between "0" and "10".
Selecting monitor brightness in day/night modes (
DAY/
Press the
key to change the brightness of the monitor from the day
NIGHT
mode to the night mode, or vice versa. Each time the key is pressed,
brightness alternates between the day and night modes.

Fishfinding video display mode

Water temperature
Lower reflection
level
Color sample
of fish video
Higher reflection
level
Water depth
The ultrasonic signals that have been emitted from the transducer at the bottom of the vessel reflect from the
underwater plankton, schools of fish, and bottom, and are then received by the transducer. The underwater
reflection level of these ultrasonic waves is displayed at a color tone level (from light blue to reddish brown) in the
fishfinding display mode.
Reflections from a small school of fish are weak and displayed in "light blue", and reflections from a large and
densely populated school of fish are strong and displayed in "orange". Reflections from the bottom are the
strongest and they are displayed in "red or reddish brown".
The fishfinding display mode can be changed to either a standard display mode (STD.), a partial expand display
mode (ZOOM), a sea bottom expand display mode (BTM. EXP.), or a mixed display mode (MIXED). The A-scope
for identifying the reflection level of the ultrasonic waves from schools of fish by a color tone and width can be
displayed in each display mode, except for mixed display.
8 3.OPERATIONS
Chart speed
Interference level
Water temperature is displayed
at the central top of the monitor.
key)
DAY/
NIGHT
However, no such display is
made when an optional water
temperature sensor is not
c o n n e c t e d o r w h e n w a t e r
temperature data is absent.
Water depth is constantly
displayed at the lower bottom of
the monitor.
Depth scale
Cursor
(Water depth)
Schools of fish
Bottom
PWR/BRT
4
6
2
8
10
OFF

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