Bedienungsanleitung Lowrance X-20 (Seite 3 von 16) (Englisch)

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SENSITIVITY

The

ability

of a sonar unit's

receiver to

display targets.

Increasing

the

sensitivity

allows weaker

targets

to be

displayed.

Also

called

"gain".

SCROLL

SPEED

See CHART SPEED.

SHOOT-THROUGH-HULL

A transducer installation

which allows the

sonar

signals

pass through

fiberglass

hull without

cutting

a hole in

the hull.

SUPPRESSION

A method

used in some sonar units to

help

eliminate

interference or noise.

SURFACE CLARITY CONTROL

Reduces or eliminates

undesirable

signals displayed

near the water's surface. Also called

"SCC".

THERMOCLINE

layer

of water caused

the

meeting

of warm and

cool

layers

of water.

The thermocline

provides

the

temperature

most

fish

prefer.

TRANSDUCER

The

element of a sonar

system

that

converts the

electrical

energy

from the transmitter

into ultrasonic sound

waves.

When a return echo strikes

the

transducer,

it converts the

sound waves

into electrical

energy

which is received

and

displayed by

the sonar

unit.

TRANSOM MOUNT

A method of

mounting

transducers

or other

sensors on the transom of the

boat.

UPPER/LOWER LIMIT

These

are the

range

limits

displayed

on the

sonar screen or

paper.

The

upper

limit is shown

at the

top

of the

display,

while

the

lower limit is at the bottom. For

example,

a 20 to 30

foot

range

has 20

feet as the

upper

limit and 30 feet

as the lower limit.

VIDEO GRAPH

A sonar unit that uses a CAT

or television

type

display.

WINDOW

A vertical

segment

of the

depth range.

For

example,

upper

limit of 20 feet and a lower limit

of 50 feet creates a 30

foot

window.

ZOOM

A feature that

enlarges

targets

on the

display

and

shows

greater

detail.

INTRODUCTION

Welcome to the

world of

sportfishing

sonar, Your Lowrance

X-20 is a

high quality

sonar

designed

for both

professional

and novice

users.

These units have

an automatic feature that

finds and

displays

the

bottom

depth,

fish,

and structure. As

you

become familiar with

your

X-

20, you

can "fine tune"

the unit to the

surrounding

conditions to

get

the

most from

your

sonar.

You can

program

the

X-20 to sound an alarm when

a fish or other sus-

pended object

enters an alarm

zone. You can

zoom in and

separate

fish from structure and other

targets.

get

started with

your

X-20,

first read the installation section.

This is

where it all

begins,

and

improper

installation can cause

problems

down

the road.

After

you've

read these

instructions and installed

your

X-20,

read the rest of this manual

in detail. The more

you

know

when

you get

the

water,

the more

your

sonar

unit will do for

you.

Take this manual

for reference

when

you

head

for the water.

INSTALLATION

Mounting

Install the X-20 in

any

convenient

location,

provided

there is clearance

when tilted for the best

viewing

angle.

Holes in the bracket

base allow

wood screw or

through

bolt

mounting.

Place a

piece

plywood

on the

back of thin

panels

to secure

the

mounting

hardware.

Make certain

there is

enough

room behind

the unit to attach the

power

and

transducer cables.

You can route the

power

and transducer

cables

through

the

one inch

hole in the base of the

gimbal

bracket.

Then

pass

them

through

a hole

in the

mounting

surface. First

pass

the transducer connector and

cable

up through

the hole and

gimbal

bracket.

Then

push

the

power

cable

wire down

through

the bracket and dash.

After

routing

the

cables,

fill

the hole

with silicone rubber adhesive

(RTV).

Offset the bracket to

cover the

majority

of the

hole.

Power Connections

The X-20

operates

from a 12 volt

battery system.

Attach the

power

cable to an

accessory

power

buss. If

you

have

problems

with

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