Lowrance electronic X-40 r

Discrimination desired, (0 through 10). Then press the DISC

key. There

should be an

immediate change in the noise

displayed

on the screen.

Turn Discrimination off

by pressing 0,DISC or

CLEAR,DISC.

To view the Discrimination setting without

changing it, press

the

[2'1 I Sec I

SURFACE CLARITY CONTROL

The

markings --or noise—at the

top of the display

can at times extend

many

feet below the surface. This can

interf ere with fish

signals

orothertargets.

These

markings are Surface Clutter and

are caused by

wave

action, boat

wakes,

bait fish, temperature Inversions, and

other reasons.

SCC has ten leveis of

adjustment. Turning

the X-40 on automati-

caily

sets SCC to level 1. To

change to a different ievel, simply

enter a

numberfrom 0 to

10, then press

2nd, SOC or

simply press

2nd, SCC. The

SCC menu appears

with the level of SCC currently

use. Use the arrow

keys in the

keyboard's zone alarm section to increase or decrease the SOC

levei. Pressthe CLEAR

keyto

erasethe menu orwait severai

seconds after

1e'L1.W .t&'

SHALWW Al

SET t I

ZONE ALARM T DISPLAY __________________

To set the Zone

Alarm,

press

the ____________

SHALLOW

SET

key

in the ZONE

ALARM

section

of the

keyboard. The letters

"ZN'

display in the iower ieft corner of the

screen. A vertical bar also displays on

the left side of the screenfor

six seconds.

This is the Zone Alarm's "window."

Any

echo that

appears on

the

right

side of the

screen between the top

and bottom of

this barwill soundtheaiarm. Adjust

both

the shallow and deep ends of

this bar to

make a smaller or larger alarm "win-

dow."

To adjust the shallow (top)

alarm, press the SHALLOW SET key.

The letters "ZN'

display

on the screen. A

vertical

bar also displays on the far left

side of the screen. This is the zone

alarm's

"window". Any

echothat

appears between

the top

and bottom of

this barwill sound

thealarm. To

adjustthetop

of the bar

press the

arrow

keyto

movethetop

of the

alarmwindowup, orthe

downarrow

keyto

move

the top of

the bar

deeper. The

longer you

hold the arrow

key,

thefaster the

end of the zone alarm bar will travel. Release the key

and in six seconds

the zone

alarm barwill

disappear. However,

the zone alarm is still activated

you

can see

the letters "ZA" in the lower

portion

of the screen.

The

bottom of the zone alarm bar is

adjusted in the same manner.

Just

press

the

DEEP SET

key

first,

then the arrow

keys

to set

the bottom of

b the bar to the desired depth.

you wish to view the zone

alarm bar

continuously, press 2nd,

DISPLAY. To turn it

off,

press 2nd, DISPLAY

again. This won't affect the

zone alarm settings. It doesn't turn

the alarm off,

just

the alarm bar.

When the zone alarm is

triggered by an

echo, the alarm

will

sound

and the words ZONE ALM will appear on

the

display.

If the range is changed, the zone

alarm settings may

need to be

changed

also,

since

they

don't track the range settings.

DISC

key.

________________ ii)

sr:.Ns 1.' t/lT' -!:,._ —

L TO CHANGE

PRESS

TUFt

I ECL I HI

r.

r ZONE ALII ;• )'[

H

Use Surface Clarity Control

(SCC) to reduce or eliminate surface

clutter. SOC varies the gain

of the

re-

ceiver between each transmit pulse,

while the receiver is "listening" for the

return echoes. The

gain

is the lowest for

echoes near

the surface. It gradually

increases as the

depth increases. The

maximum depth that SOC will affect is

one-half of the selected

depth range. For

example, with maximum SCC,

on a 0 to

60 foot range,

SCC

would have an effect

from the surface to 30 feet.

-4 THERE FWE

10 LE"EL3

OF 'ECC

0 IURh.E'

OFF 9CC TO CHANGE

4 3CC PRESS

0-10 ZND

FOR NO

C HHt4CE

PRESS CLEAR F

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