Lowrance electronic X-40 I IGRAYLINEI i.e

of the X-40

including

8CC, Discrimination, and Upper

Limit. When other If a partial arch occurs most of the time on your unit (the

mark

functions are described in this

manual, the CLEAR

key's operation will be

explained in detail.

AUTO ____

Turning

the X-40 on

enables the automatic mode. To switch to the

manual

mode,

pressthe

AUTO

key

located above the ON

key. Pressing

the

AUTO

key

erasestheword AUTO atthe

topof

the

display. This cancels auto

sensitivity and ranging, giving you complete manual control of the unit.

Return

the X-40 to automatic at

any

time

by pressing the AUTO key again.

curves up, but not back

down,

vice-versa)

it

could be the transducer is

not

pointing straight down. Adjust

a

transom mounted transducer until the

fish show the distinctive

arch. This

maytake

some trial and error until you

achieve the correct

mounting.

Remember,

there must be

some movement between the boat and

thefishto

developthe

arch. Usually,

this

meanstrolling atveryslowspeeds

with

the main engine in

gear

at a minimum throttle

selling.

Thedepth

of thewaterwill affectthe size and

shape of the fish arch

duetothe

coneanglediameter. Forexample, if

thecone

passes overafish

in shallow

water, the

signal displayed

on the X-40

may

not arch at all. This

is due to the narrow cone diameter and the

resolution limitations of the

display.

SENSITIVITY

—1 I1 ii kq

I — IGRAYLINEI i.e_i

SET

When first turned on,

the X-40

in

the AUTO SEARCH mode. The

micro-computer automatically adjusts

the

sensitivity

and range

to find and

lock onto

the bottom. You can leave the

sensitivity in

the automatic mode

or

manually adjust

it to suit conditions.

A horizontal bar at the

top of the

screen displays

the

sensitMty

level. When the sensitivity is at its minimum level, the bar is

very

short.

Increasing

the sensitivity

causes the bar to travel to the right, increasing in

length correspondingly. Selling

the

sensitivity to maximum will cause the

barto extend

across the

top

of the

display. (There

are 32

steps

sensitivity

available.)

place

the X-40 in manual mode, pressthe

AUTO key

once. This

turns auto sensitivity off. The word AUTO at the top

of the display

will

disappear, signifying that the X-40 is in

the manual mode. To Increase the

sensitivity, press and hold the

right

arrow

key until the

sensitivity is at the

desired level. The left arrow decreases sensitivity in the same manner.

Notice how

the

sensitivity bar

moves as

you change settings. When you

pressthe

rightarrow key,

the bar moves tothe

right, indicating

increase

in

sensitivity. Pressing

the left

arrow

key

moves the bar to the

left,

showing

the

sensitivity has

decreased accordingly. You'll also seethe

change on

the

display.

The

photo

on the next

page

shows a

graph with too little

sensitivity.

On the right, the graph

has a

proper sensitivity setting. A fish

along

with

higher

surface clutter are now

visible, and the bottom

signal has widened.

Compared to a

paper graph, a X-40 cannot show as fine of detail.

The

reason for this is the pixels (dots

on the

screen) are much

larger

than

paper

graph's markings. Therefore,

the X-.40 cannot

show fish arches as

well asa

graph. Plus,

it

requiresa bit

morework

initiallyto

read and

interpret

the screen than a paper

graph.

Very

small fish probablywill not arch at all. Medium sized fish will

show a

partial arch, or a

shape similar to an arch if

they're

in

deep

water.

Largefishwill arch, butturnthesensitivity upin deeperwaterto

seethearch.

Because of

water

conditions, such as

heavy surface clutter, thermoclines,

etc.,

the

sensitivity sometimes cannot be increased enough to get fish

arches.

One of the best

ways

to

get

fish arches is to

expand or "zoom" a

segmentofthewater.

For

example,

40 to

60 feet. The smaller the

segment,

the better

the screen resolution will be. Then,

turn

up

the

sensitivity

high

as possible without

getting

too much noise on

the screen. In medium to

deep

water, this method should work to

display

fish arches.

WATER

TEMPERATURE AND THERMOCLINES

Water

temperature has an important-If not controlling-influence

upon the

activities of all fish. Fish are cold blooded and their bodies are

aiwaysthe temperature

of the

surroundingwater. During thewinter,

colder

water slows down

their metabolism. At this

time, they

need about a fourth

as much

food as

they

consume in the summer.

8 29

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