Lowrance electronic X-55A iw

DISPLAY CONTRAST

The unit's display contrast is

adjustable to suit different

light-

ing

conditions. To

adjust it, first

press

the menu key. The first

page appears.

Now

press

the key next to the "ADJUST

DISPLAY CONTRAST" label.

A screen similar to the at right

appears. Now press the key

adjacent to the left arrow to

decrease the contrast. Press

the

key adjacenttothe rightarrowto

increase it. The

percentage

of contrast

in use

changes

as the arrow keys

are

pressed. The bar chart also

gives

graphical indication of the contrast level. You can see the

change on the

screen asyou pressthe keys. Afteryou've

made the

adjustment, press

the

CLEAR

key

to erase the menu.

MENU - PAGE 2

ADJUSTBACKLIGHT LEVEL

The X-55A has internal lights

for the display

and keyboard.

To adjust the intensity of the

lighting,

press

the MENU key

twice,

then press

the

key adja-

cent to the "ADJUST BACK

LIGHT LEVEL" label. The

screen shown below appears.

Now

press the left arrow key

decrease the light level. Press

the right arrow key to increase

ADJUST BACK

MEW

LIGHT LEUEL

TURN DIGITAL BOX OFF

CONSTRUCT DIGITAL BOX

F

EXIT' AtE

changes as the arrow keys are pressed. The bar chart also gives a

graphical indication of

the

level. After

you've

made the

adjustment, press

the

CLEAR

key

erase the menu.

BACK LIGHT ONIOFF

To turn the back

lighting on, press

the menu key twice, then

press the

key

adjacentto

the "BACK LIGHT' label. This moves the black boxfrom "OFF"

to the "ON"

position. To turn the backlights off, repeat

the same steps.

SELECT UNITS OF MEASURE

The X-55A can display the wa-

ter depth in feet, fathoms, or

meters, surface watertempera-

ture in degrees Fahrenheit or

Celsius, speed in statute miles

perhour,

kilometers

perhour,

knots,

and distance

(log)

miles,

kilometers, or nautical miles.

!PTH:FMM

LJH

change the units of

measure,

press the key adjacent to the

"SELECT UNITS OF MEASURE" label. The screen shown at right ap-

pears.

The black

box on each line shows the unit of measure currently in

use. In the screen shown below, the units of measure are in feet for the

depth, temperature in degrees Fahrenheit, and both speed and log

are in

statute miles per

hour. Press the key adjacent to the

unit that

you

wish to

change. For

example, press

the

key

next to the DEPTH label two times to

switch from feet to meters. This moves the black box two times from the

"Fl"' to the "M".

When you

have

the units

of measure set as

desired, press

the

key next to the "EXIT" label.

CLEAR DISTANCE LOG

The X-55A starts counting distance as soon as the X-55A is turned on. To

reset the distance log to zero, press the MENU key until the "CLEAR

DISTANCE LOG" label

appears,

then press

the

key adjacent

to that label.

MENU-PAGE 5

ADJUST CHART

SURFACE CLARITY

The markings extending downward from the zero line on the chart are

called "surface clutter." These

markings are caused by

wave

action,

boat

wakes, temperature inversion,

and other natural causes.

The Surface Clarity Control

(5CC) reduces or eliminates

surface clutter

signals

from

the

display. SCC varies the

sensi-

tivity of the

receiver, decreas-

ing it near the surface and

gradually increasing it as the

depth increases. The maximum

depth that SCC will affect is

JUSTHART

SURFACE CLARITY

tEDHIGL

rUST

LEUEL

OF CHART ASP

IEJJrnu HIGH

PIGES MORE

it. The percentage of back light in use

24 29

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