Bedienungsanleitung Lowrance X-15A (Seite 2 von 12) (Englisch)

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INDEX

Lower Limit .

level whereas

the

highest

value

(4)

the

strongest

level and

should

be used

only

when

severe

noise

present.

To use the Discrimination

func-

tion, simply press

the level of

noise

rejection

desired,

from 1 to

then

press

the

DISC

(Discrimi-

nation) Key.

There should

be an

immediate

change

in the amount

of noise

present

on the

paper.

The

Discrimination

setting

printed

the bottom of

the

paper

each time

the level is entered

and at inter-

vals thereafter.

The Discrimination

-function can

be disabled at

any

time

by press-

ing

DISC.

Example:

Enter a Discrimination

level of 2.

Press:

DISC

Figure

Transmit and

Print Alternate

When

using

the X-15A in

deep

water,

or if

you

wish to

simply

con-

serve

paper,

may

be desirable

slow

the

paper speed

even more

than

the automatic

system

allows.

However,

when

doing so, you may

get

"over

print'

very

dark,

heavy printing

over

an area that is

difficult to read.

Much detail can

also be lost

due to this.

A feature that

is available on

the X-15A

is the Transmit and

Print Alternate

function

which,

when

activated,

causes

the

stylus

print every

other

revolution in-

stead of

every

revolution.

This

accomplishes

four

things:

1. Since the

stylus only prints

every

other

revolution,

the

recorded

information doesn't

have

the "over

printt'

problem,

therefore

good

records

are

attainable

at slower

paper

speeds.

Also,

the scale

num-

bers

are

spread

out

more,

mak-

ing

them more

legible.

2. Reduces the

possibility

"wrap-around".

This

is the un-

desirable occurrence

of the

second or

third bottom echo

printed

on the

paper

at the

top

or middle

of the

page. Many

times this can

interfere

with fish

or other

targets

that

you

wish

to see.

3. Reduces the reverberation

ef-

fect. This

happens

mainly

lower

frequency

units,

but it

can

happen

higher

fre-

quency

models. Reverberation

heavy,

scattered

noise marks

caused

the transmitted

sig-

nal

becoming trapped

between

the surface

and the

bottom,

usually

scattered

heavy

plankton layers

or baitfish

schools. This

causes a

great

many

lines

to be

printed

on the

page.

By enabling

the Transmit

and

function,

the transmit-

ter

triggered only

half as

many

times as

normal,

putting

less

energy

into the water

(same

amount of

power, just

not

often)

which reduces

the

amount of noise seen.

4. Slows

the

paper speed.

sig-

nificant amount of

paper

can

be saved

by using

the Alter-

nate Transmit and Print

feature.

Specifications

Service

Information

Introduction

How

It Works

Installation

Transducer Selection

Basic

Operation

Suppressor

Paper Speed

GRAYLINE®

Range

..14

.15

.16

Result:

2-——

--• -

2'I-

-••--— ______

Upper

Limit

Lines

Marker

Scale

End Of

Paper

Zero

Adjust

How

To Read

Graphs

Paper Loading

Stylus

Replacement

Stylus

Belt

Replacement

Do's and Dont's

Troubleshooting

Advanced

Operation

Surface

Clarity

Control

(SCC)

Feet, Fathoms,

Meters

Transmitter

Pulse Width

Discrimination

Transmit

and Print Alternate

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