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

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resolution.

For

example,

if a 50

Its

initial

transmitter

pulse length

selected,

and the

Suppressor

control is rotated

maximum,

the

transmitter

pulse length

would be

850 is.

Returning

the

Suppressor

control to

minimum will restore the

unit to a 50

' transmitter

pulse

length.

The X-15B

will

display

the initial

transmitter

pulse length

at the bot-

tom of the

paper

when

you

ovei-

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

Its

initial

pulse

length

would

be dis-

played

P-SD.

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

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

thelnitial

pulse

lenth.

Example:

Set the

initial transmit

pulse length

to 100

mipro-secqnds..

Press; 1 -0- 0

PULSE

Result:

2—

2'i

———

•——..-..

—-———2b

Nfl

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

increases the transmitter's

pulse

length

which decreases resolution

and causes

targets

that are close

together

merge

into

one "blob"

instead of two distinct

image

Discrimination is a

program

installed in the X-lSBs

micro-processor

that

enables it to

process

the

output

from

the e-

ceiver,

determine which

signals

are noise and

eliminate

them,

then

only

the

legitimate

echoes.

Using

this

concept,

the transmit-

ted

pulse

does not have to be

increased,

thsrefpre records with

high

resolution and

high

noise

irri-

munity

can be

achieved.

(The Suppressor

Control

may

used

wth

the Discrimination to

cancel OUT

heavy

interference

noiSe

whenever

high

resolution is

not

requfred.)

There are four leyets of

Dis-

crimination that can be

used. The

lowest value

(1)

is the weakest

SPECIFICATIONS

—

X-15 B

Depth Ranges:

Feet, fathoms,

meters.

Operating Frequency:

192 kHz

(192,000 cycles per

second); accuracy

is within 0.6

percent.

Pulse

Length:

(duration

pplse):

200-i

000p.s

(30-2000jis 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

121/4"

Height

8%"

Depth

51/4"

Instrument

Only:

Width

91/2"

Height

71/2"

Depth

5¼"

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

mey

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.

Call

(918)

234-1452.

Please detail

the

problem you

are

experiencing.

Our Service De-

partment may

be able to save

you

the inconvenience of

returning

yoUr

unit.

If it is determined that

your

unit

must be

returned,

full

shipping

in-

structions will be

provided.

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