Manual Lowrance X-16 (page 9 of 16) (English)

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selected,

the transmit

pulse length

would be: 525 + 200

725

micro-seconds. We added the ini-

tial transmit

pulse

of 525 micro-

seconds which is listed

in the

initial transmit

pulse

chart,

to 200

micro-seconds,

which

Sup-

pressor

level

according

to the

Discrimination

Suppressor

chart.

So the total

initial transmit

pulse

length

is 725 micro-seconds.

Now,

if we

want,

we can increase the

PAPER SPEED CONTROL

This

key adjusts

the

speed

the chart

paper.

Its

range

is 0 to 7.

When

the X-16 is first turned

on,

the

paper speed

is set to level 5.

This

setting

good

for detailed

graphs,

in shallow to medium

depths

when

trolling.

will show

proper

fish arches at

low

speeds

and

keeps high speed

information from

being

com-

pressed.

The

paper speed

should

be turned down when

using

the

unit in

deep

water. This will

pre-

vent

gaps

from

appearing

in the

record.

fact,

the

microcomputer

will

automatically

slow the max-

imum

speed

of the chart

paper

when

operating

deep

water.

change

the

speed

of the

chart

paper, simply press

the new

level

desired,

from 0 to

then

press

the

PAPER

SPEED

key.

The

paper speed

should

change

immediately.

Remember,

gaps

in the record

appear,

turn the

paper

speed

down

until a solid record is

achieved. The

paper speed may

also be

slowed

when not

looking

for fish or to

simply

conserve

paper.

heavy printing,

or "over-

strike"

occurs,

turn the

paper

speed

up.

Overstrike

happens

when the

paper

moves too slow

past

the

stylus,

which causes the

stylus

over a

large portion

of the

mark. This makes

heavy,

black marks on the chart

paper. Usually,

the easiest

way

solve this

problem

is to turn the

paper speed up.

However,

Alter-

nate Transmit and Print or the

Paper

Save function listed in the

Advanced

Operation

section in this

manual,

may help

also.

GRAYLINE CONTROL

The GRAYLINE function can be

SUPPRESSOR LEVEL INITIAL TRANSMIT PULSE INCREASE

(micro-seconds)

0 AUTOMATIC

1 0

2 100

3 200

4 330

5 450

6 600

7 800

the

digital

shows

on the

X-16

•

(random

short lines

running

ver-

tically

across the

paper),

then

increase

the

Discrimination level

until

they

are

gone.

To use the Discrimination func-

tion, simply press

the level of

noise

rejection

desired,

from 0 to

then the

Disc

(Discrimination)

key.

There should be an

immedi-

ate

change

in the amount of noise

present

on the

paper.

The

Discrim-

ination

setting

printed

at the

bottom of the

paper

each time the

level is entered and at intervals

thereafter. When

the X-16 is

shipped

from the

factory,

the Dis-

crimination level is set to 1.

The Discrimination function can

be disabled at

any

time

by press-

ingO-DISC.

Example:

Enter a Discrimination

level of

IF INITIAL TRANSMIT PULSE

LENGTH IS LESS THAN 500 MICRO-

SECONDS:

DISCRIMINATION LEVEL

SUPPRESSOR LEVEL

2 2

4 4

IF INITIAL TRANSMIT PULSE LENGTH

IS GREATER THAN 500

MICRO- SECONDS:

DISCRIMINATION LEVEL SUPPRESSOR LEVEL

2 3

4 5

FIGURE 7

----0.0--—

automatically

increased when

the Discrimination level is

increased. This is done for better

noise

rejection.

The

following

chart

shows the

relationship

between

Suppression

and Discrimination.

Remember,

Suppressor

value 1

adds

nothing

to the initial transmit

pulse length.

In other

words,

if the

lower limit

selected was 525 feet and a

Discrimination level of

2 was

PRESS:

DISC FIGURE 8

—nfl ———-— — — — ——__________

12.0

•

12.0

24.0

fl'

•

' •

-•

48,0

22 7

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Lowrance X-16 Manual

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