Bedienungsanleitung Lowrance X-20A (Seite 5 von 16) (Englisch)

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Weak bottom

echo, digital readings

erratic,

or no fish

signals (cont4:

INTRODUCTION

2. Electrical

noisefromthe boat's motorcan interfere wlththe sonar. This

causes

the sonar to

automatically

increase its Discrimination

or noise

rejection

feature.

This can cause the unit to eliminate

weakersignals

such

fish

oreven structure

from the

display.

3. The water

may

deeper

than the sonar's

ability

find the bottom. if the

sonar can't find the bottom

signal

while it's in the

automatic

mode,

the

digital

will

flash

continuously.

may change

the

range

to limits far

greaterthan

the water

you

are in. If this

happens, place

the unit in the manual mode,

then

change

the

range

to a realistic

one,

(for example,

0-100

feet)

and increase the

sensitivity.

you

move Into shallower

water,

a bottom

signal

should

appear.

Check

the

battery voltage.

if the

voltage drops,

the unit's transmitter

power

also

drops, reducing

its

ability

to find the bottom or

targets.

Bottom

echo

disappears

high speeds

or erratic

dIgital

reading

or weak

bottom echo while boat Is

moving

1. The transducer

may

be in turbulent water. It must be mounted

in a smooth

flow of water in order forthe sonar to work at all boat

speeds.

Air bubbles in the

water

disrupt

the sonar

signals, interfering

with its

ability

to find the bottom or

other

targets.

The technical term for this is 'Cavitation'.

2. Electrical noise fromthe boat's motorcan Interfere with the

sonar. Thiscauses

the sonar to

automatically

increase its Discrimination or noise

rejection

feature.

This can cause the unit to eliminate

weakersignals

such as fish oreven structure

from the

display. Try using resistorspark plugs

routing

the

sonar unit's

power

and transducer cables

away

from other electrical

wiring

on the boat.

No fish

arches when the Fish ID feature Is off:

1. Make certain

transducer is

pointing straight

down. This is the

most common

problem

if a

partial

arch is

displayed.

See the Fish Arch section in this manual

for more information.

2. The

sensitivity may

not be

high enough.

in orderforthe unit to

display

a fish

arch,

it has to be able to receive the fish's echo from the time

it enters the cone

until

it leaves. if the

sensitivity

is not

high enough,

the unit

displays

the fish

only

when it is in the center of the cone.

3. Use the Zoom feature,

It is much easierto

display

fish arches when zoomed

in on a small

range

of waterthan a

large

one. For

example, you

will have much

better luck

seeing

fish arches with

a 30 to 60 foot

range

than a 0 to 60 foot

range.

This

enlarges

the

targets,

allowing

the

display

to show

much more detail.

Welcome to the world of

sportfishing

sonar. Your Lowrance

X-20A is

high quality

sonar

designed

for both

professional

and novice users.

This unit has an automatic feature

that finds and

displays

the

bottom

depth, fish,

and structure. As

you

become

familiar with

your

X-20A, you

can "fine tune" the unit to the

surrounding

conditions to

get

the most

from

your

sonar.

Although

the X-20A

has

many

features and

functions,

the

simple key-

board and

operation

modes makes it

easy

use and understand.

Read this manual

and take it with

you

when

you

use

this unit. it makes

great

reference should

you

need it. The more

you

know when

you get

the

water,

the more

your

X-20A can do for

you!

INSTALLATION

Mounting

install the unit in

any

convenient

location,

provided

there is clearance

when tilted

for the best

viewing angie.

Holes

in the bracket base allow

wood screw

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

a one inch hole

in the

mounting

surface.

First

pass

the transducer

connector and cable

up through

the hole. Then

push

the

power

cable

wire down

through

it.

After

routing

the

cables,

fill the hole with silicone rubber

adhesive

(RTV).

Offset

the bracket to cover the hole. Route the

cables

through

the slot in the rear of the

bracket. There are two notches

in the bracket

that can be

punched

out for

cables,

necessary.

NOTCIII

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