Handleiding Lowrance X-16 (pagina 4 van 16) (Engels)

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INTRODUCTION

The Lowrance X-16 is a

highly

sophisticated recording depth

sounder Thanks to a micro-com-

puter,

the X-16 can do more than

any

other sonar unit in its

price

range plus many

that cost much

more.

Using

the

waterproof key-

board,

full control of the

system

your fingertips

to meet the

changing

demands of

varying

bot-

tom

conditions,

water

depth,

and

boat

speed.

You can select the

unit's

sensitivity,

discrimination

level, upper

and lower

depth

range, paper speed, GRAYLINE,

and

many

features. The

patented

Lowrance variable

sup-

pression system

combined with

the new Discrimination feature not

only

filters out false

signals

with-

out

distorting

the real

ones,

but is

syncronized

with the GRAYLINE

function to

provide

clear

signals

under all

conditions.

HOW IT WORKS

When the

unit is turned

on,

electronically regulated

motor

drives a

lightweight

belt located at

the

right edge

of the

recording

paper

The

stylus

attached to

this belt. When the

stylus

is at the

top

of the

paper

a small

mark is

made. This is called the zero

mark,

and

represents

the

surface

the water. The

stylus

continues

FIGURE 1

GRAPH

PAPER

to move

down the

edge

of the

paper

while

the sound

pulse

traveling

through

the

water,

and

when an echo

detected,

the

stylus

makes

another mark on the

paper.

The

depth

of the

object

which reflected the

echo can be

read in

feet, fathoms,

or meters

comparing

its location

on the

paper

to the

depth

scale

printed

on the

paper.

The

paper speed

is controlled

a variable

speed

motor

During

one revolution of the

stylus

belt,

very

narrow mark

will be made

the flexible

stylus,

but the

paper

will move a small amount before

the next revolution. Each mark will

blend into the one before so that a

composite picture"

of the

target

will be

made,

one

tiny

mark at a

time.

INSTALLATION

Mounting

—

The

depth

sounder

may

installed

any

convenient

area,

provided

the unit can be tilted for

the best

viewing angle.

Holes

the bracket base allow wood

screw or bolt

mounting.

A wood

stiffener

may

required

on the

back of thin

fiberglass panels

support

the unit.

Make certain there is

enough

room on the back side of the unit

to attach the

power

and trans-

PULLEY

DRIVE

-STYLUS

DRIVE

BELT

•

STYLUS

PULLEY

on the X-16.

Because the

transmitted

power

greater,

stronger signals

are transmitted

into the water. This will

increase

the

depth range

of the unit and

the

signal

to noise

ratio, plus

the

ability

to see small detail is

enhanced. For installation

instructions on the LPB-1

92,

read

the owner's manual included with

the

power

booster.

To turn the

power

booster

on,

press

12- 2nd -5.

To turn

the

power

booster

off,

press

2nd

FREQUENCY

CONVERTER

The Model LXC-16

frequency

converter allows the

X-16 to use

either a 50 kHz or 192 kHz

operating frequency

at the

discretion of the

operator.

It can

switched from 192 to 50 kHz at

any

time

by using

the

keyboard.

For

installation

instructions,

see

the

owner's manual included with

the LXC-16.

To turn

the

frequency

converter

on, press

2nd

To turn

the

frequency

converter

off, press

2nd

GLOSSARY OF

TERMS

CAVITATION Air bubbles

trapped

against

the transducer.

This is

typically

caused

improper

transducer installation. Aluminum

boats in

particular

have

problems

with cavitation. The

problem

most

evident when

travelling

high speed.

Air bubbles are cre-

ated

rivets, strakes, ribs,

other

objects

which then

pass

over

the face of the

transducer. For the

proper operation

of the

transducer,

it must have solid

contact with the

water at all times.

MICRO-SECOND

Unit of mea-

sure. One micro-second is

equal

to 0.001

second. Used in sonar to

measure the amount of time

the

unit is

transmitting.

Abbreviation:

W5.

NOISE

Any

undesired

signal.

Noise can

show

on a

graph

recorder as small

dots or lines

randomly

scattered across the

paper.

It can be

caused

electri-

cal sources such as

alternators,

spark plugs, improper

wiring,

mechanical

sources,

air

bubbles

passing

over the

face of the

transducer,

vibration of the

engine,

a loose transducer

mounting.

OUTPUT POWER The amount

electrical

energy applied

to the

transducer

the transmitter.

Expressed

wafts,

typically

the

higher

the

output power

a sonar

unit

has,

the

deeper

it can

read,

and

smaller detail can be shown.

POWER

BOOSTER A device

which

connects to the transducer

jack

of the sonar

unit and

increases its

output power.

PULSE LENGTH

The

length

time that the sonar unit

transmits

pulse

of sound

into the water

This

period

of time is

very

short

and is

usually

referred to in micro-

seconds. Also called Pulse Width.

RANGE Maximum

depth

that a

sonar

unit is set to

display.

For

example,

range setting

of 0-60

feet on a

graph

means that the

maximum

depth

that can be dis-

played

before

the bottom echo

drops

off the chart

paper

is 60

feet.

RESOLUTION

The

ability

of a

sonar unit to

separate targets.

This

ability

determined

the

pulse length

of the unit. If

the

pulse length

very short,

micro-seconds for

example,

then

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