Bedienungsanleitung Lowrance X-15A (Seite 3 von 12) (Englisch)

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resolution.

For

example,

if a 50

initial

transmitter

pulse length

selected,

and the

Suppressor

control is rotated to

maximum,

the

transmitter

pulse length

would be

850

ps. Returning

the

Suppressor

control to minimum will restore

the

unit to a 50

transmitter

pulse

length.

The X-15A will

display

the initial

transmitter

pulse length

at the bot-

tom of the

paper

when

you

over-

ride the

micro-computer.

distinguish

the initial transmitter

pulse

from the other information

printed

on the

paper,

the

graph

will

P-100

(if

the

pulse

is set

to 100

micro-seconds.)

A 50

initial

pulse length

would be dis-

played

as P-SO.

To set the initial transmitter

pulse length, simply press

on the

keyboard

the initial

pulse length

desired and then

press

the

PULSE

key.

For

example,

set

the initial transmit

pulse length

150

micro-seconds,

press

PULSE. This will override the

micro-computer's

selection and

set the initial transmitter

pulse

length

to 150 micro-seconds.

P-iSO will be

printed

at the bottom

of the

paper

signify

that the en-

try

has been confirmed.

(Note:

When

an initial transmit

pulse

length

set,

this

length

will be

fixed for all

depth settings

until

changed.)

To return control back to the

micro-computer, press

PULSE

and the

micro-computer

will select

the initial

pulse length.

Example:

Set the initial transmit

pulse length

to 100

micro-seconds.

Press:

PULSE

Result:

---—-bO-—-F-ILU

-•-—--

Figure

Discrimination

Noise

pulses

are

the

largest

complaint

most often received

about sonar

units. Lowrance has

had the

patented

Suppression

system

for

many years

which is

quite

effective at

eliminating

noise

from the

display.

(See

Transmit

Pulse

Width.)

The

only

drawback

to the

Suppression

system

is that

it increases the

transmitter's

pulse

length

which decreases

resolution

and causes

targets

that are close

together

merge

into

one "blob"

instead of

two distinct

images.

Discrimination is a

program

installed in the X-15A's

micro-processor

that

enables

process

the

output

from the re-

ceiver,

determine which

signals

are noise and eliminate

them,

then

print only

the

legitimate

echoes.

Using

this

concept,

the transmit-

ted

pulse

does not have to be

increased,

therefore records with

high

resolution and

high

noise im-

munity

can be achieved.

(The Suppressor

Control

may

be used with the Discrimination to

cancel OUT

heavy

interference or

noise whenever

high

resolution is

not

required.)

There are four levels of Dis-

crimination that can be used. The

lowest value

(1)

is the weakest

SPECIFICATIONS

—

X-15A

Depth Ranges:

Feet, fathoms,

meters.

Operating Frequency:

192 kHz

(192,000 cycles per

second); accuracy

is within 0.6

percent.

Pulse

Length:

(duration

pulse):

200-l000ps

(30-2000gs programable)

Operating Voltage:

Minimum: 10 volts DC

Maximum: 15 volts DC

Operating

Current:

0.7 to 1.8

amps depending

printing density

and

output

power.

Output

Power:

1600 watts

typical peak-to-peak.

(200

watts

RMS)

Weight:

8.5 lb.

(3.9 Kg)

Dimension:

With Gimbal Mount:

Width

12¼"

Height

Depth

6%"

Instrument

Only:

Width

101/4"

Height

8¼"

Depth

6%"

NOTICE

Periodically

wash the Trans-

ducer Face with

soap

and

water

to remove

any

oil

film that

may

collect Oil and dirt on the face

will reduce

sensitivity

may

even

prevent sounding.

GOT A PROBLEM? LET US

HELP!

you

have a

problem

with

your

sonar

unit,

please give

us a

chance to

help

before

sending

it in

for

repair.

Assistance can often be ex-

tended

by telephone

or letter.

Write or call one of our Authorized

Service Centers or the Lowrance

Electronics, Inc.,

Customer Ser-

vice

Department

Tulsa,

OK.

(Toil-free 1-800-331-3889).

Please detail the

problem you

are

experiencing.

Our Service De-

partment may

be able to save

you

the inconvenience of

returning

your

unit.

it is determined that

your

unit

must be

returned,

full

shipping

in-

structions will be

provided.

SCHEMATIC DIAGRAM AND

PARTS LIST

Should

you

desire a Schematic

Diagram

and

Parts list for

your

Lowrance TRUELINE RECORD-

ER,

send

$1.00

to PARTS

LIST,

Lowrance

Electronics, Inc.,

12000

East

Skelly

Drive, Tulsa,

Okla-

homa 74128. Be sure and

give

the Model Number and Serial

Number of

your

SONAR

INSTRUMENT

—

Ia—-—

—•---••-—- —.

2L1---——.-—

———-

29-—-

NOTE: This sonar uses LPG -605 Chart

Paper.

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