Manual Lowrance X-55 (page 13 of 20) (English)

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____________________________

To turn the

menus

off,

press

the

key

adjacent

to the CLEAR

key

at the

ADJUST CHART SURFACE

CLARITY

The

markings

extending

down-

ward

from the zero line on the

chart are called "surface clut-

ter." These

markings

are

caused

wave

action,

boat

wakes,

temperature

inversion,

and other natural causes.

The Surface

Clarity

Control

(5CC)

reduces

or eliminates surface clutter

signals

from the

display.

3CC varies the

sensitivity

of the

receiver,

decreasing

it near the surface and

gradually increasing

it as the

depth

increases. The maximum

depth

that 5CC will affect is 75% of the selected

depth

range.

For

example,

on a 0-60 foot

range

with maximum

8CC,

surface

clutter will be reduced down to 45 feet.

There are

three levels of 8CC available on the X-55:

low, medium,

and

high.

When it's turned

on forthe first

time,

the 8CC level is low. To

change

it,

press

the

key

five

times,

then

press

the

key adjacent

to the

"ADJUST CHARTSURFACE CLARITY"

label until the black box is on the

desired 3CC level.

Press the

key

next to the "EXIT" label when

you're

finished.

ASP

(Advanced Signal Processing)

The ASP feature is a noise

rejection system

built into

the X-55 that

constantly

evaluates the effects of boat

speed,

water

conditions,

and

interference. This automatic feature

gives you

the best

display possible

under most conditions.

The ASP feature is an effective tool in

combating

noise. In

sonar

terms,

noise is

any

undesired

signal.

It is caused

electrical

and mechanical

sources

such as

bilge pumps, engine ignition systems

and

wiring,

air

bubbles

passing

over the face of the

transducer,

even vibration from

the

engine.

In all

cases,

noise

can

produce

unwanted marks

on the

display.

The ASP feature hastwo

levels

Normal and

High.

you

have

high

noise

levels,try using

the

"Nigh"

ASP

setting.

However,

you

are

having

trouble

with

noise,

suggest

that

you

take

steps

to find the interference

source

and fix

it,

rather than

continually using

the unit with the

high

ASP

setting.

bottom left side of the unit

or wait a few seconds and the menus will

disappear.

RANGE

Automatic

When turned

onforthefirsttime, theX-S5automatically placesthe

bottom

signal

in the lower half of the screen. This

is called Auto

Ranging

and is

part

of the automatic function. The

range

cannot be

changed manually

while the unit is in automatic.

RANGE

Manual

The X-55

gives you

control overthe

range

when it's in the manual

mode.

change

the

range,

first make

_____________________

certaintheX-55

isinthe manual

mode.

Next,

pressthe

RANGE

key.

The

range adjustment

appearsinthe

lower

right

cornerof the

display.

Pressthe

or down

arrow

keys

to de-

crease or increase the

range.

_____

The available

range.s

are

0-5,

___________

10, 20, 30, 40, 60, 100, 150,

200, 300, 500, 800,

and 1000

________________

feet. After the desired

range

displayed, press

the CLEAR

key

to erase the

range

menu.

NOTE: The

depth capability

of the X-55

depends

on the transducer

installation,

water and bottom

conditions,

and other

factors.

RANGE

Upper

and Lower Limits

The

X-55 lets

you change

the

upper

and lower

range

limits when it's

in the

manual

mode. This lets

you

'zoom' in on

segments

of the

water as small

as5feet.

otherwords,

you

can setthe

upper

limitto 3ofeetandthe lower

limit to 35

feet, regardless

of the bottom

depth.

This in

essence,

gives you

aS foot zoom.

You can choose

any segment

of the

water,

long

as the

distance between the

upper

limit and lower limit is 5 feet

meters,

fathom)

or more.

Using

the zoom feature

(described

in the next

section)

lets

you

view

segment

of the water on the screen's

right

side

(for

example,

from 20

to 30

feet),

and a zoom of that

segment

on the left.

change

the

upper

or lower

limit,

first make certain the unit is in

the

manual mode.

9&3FTks

<CHANGE

UPPER LIMIT

<CHANGE

LOWER LIMIT

(HELPI

40 FT

III8

100 FT

_________________ DEEP

SHAL

60 FT

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Lowrance X-55 Manual

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