Bedienungsanleitung Lowrance X-20 (Seite 13 von 16) (Englisch)

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-IL,

TRANSDUCERS AND CONE

ANGLES

The sound waves from the transducer

spread

out into the

water in a

cone

shaped

beam. This looks much

like the beam from a

flashlight.

The

angle

between the outside

edges

of the cone is the cone

angle.

Lowrance offers a choice of transducers

with either an 8 or 20

degree

cone

angle. Typically,

wide cone

angle

transducers

(20 degrees)

are

ideal for

operating

in shallow

to medium water

depths.

The

degree

cone

angle

allows

you

to see

more of the underwater world. In 15

feet

of water the 20

degree

cone covers an area

about six feet across. The

degree

transducer covers

only

about a two foot circle.

The 20

degree

transducer is almost

always

the best to use

in fresh

water,

the 8

degree mostly

salt

water. In a

deep

water environment,

(300

feet

fresh

water,

100 feet

salt

water)

the narrow cone

angle

more desirable. Since the sound

energy

is concentrated

smaller

area,

ft can

penetrate

to much

deeper

depths.

ZOOM

Manual Mode

Zoom

operates

differently

when the unit is in the

manual mode. The

range

doesn't

change

when the zoom

key

pressed.

Instead, press

the down arrow

key

to shift the

range

down in one

footincrements. The

arrow

key

shifts the

range up

in one foot increments.

For

example,

the unit is on the 0-60 toot

range,

and the manual

mode is

on, pressing

the zoom

key,

then the

down arrow

key

once will move

the 0-60'

range

to 1 '-61'. The best

way

to use

this feature is to

change

the

range

to a

smaller one,

then

press

the

zoom

key,

shift the

range

until the

area is

displayed

that

you

want zoomed.

For

example,

if the bottom

depth

is 50

feet,

and

you

wish to

enlarge

the area

immediately

above

it,

first

change

the

range

to 0-15 feet. Now

press

the zoom

key. Finally, press

the

down arrow

key

until the bottom

appears.

Now

you

have a fifteen

toot

zoom window around the bottom

signal.

iLl

AUTO

F1 D

DLI

DIGITAL

Built inside the X-20

is a

complete

digital

sonar. It

works

automatically

to discriminate between the valid

bottom echoes and false echoes

from

fish,

thermoclines,

or other

signals.

The

digital display

will

show

only

the bottom

depth.

power on,

the

digital

will

flash

"0" until it has "locked on" to

the

bottom

signal.

Once it has

acquired

the bottom

depth,

it will

display

the lower left side of the

display.

MODE 5-All

chart,

High Speed

Scroll. In this mode the chart

scrolls at

high speed.

The chart

speed

can be

adjusted

with the

CHART SPEED

key

if desired.

Chart

uses full screen.

digital depth

indicator.

No FASTFRAK.

No automatic

operation

al-

lowed.

Fish l.D. feature or Fish

Alarm

Chart alarm is

allowed.

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