Lowrance electronic X-16 a , to

12.0

24.0

26.0

49.0

60.0 Ft 21 L0IJRAHCE

FIGURE 16

MARKER

An event marker function is

included in the X-1 6 so that events

may be marked when desired. To

use the

marker, simply press the

MARK key and a vertical line will

be displayed across the entire

page. Hold the MARK key down

and a vertical line will be printed

for as long as the

key is held

down.

Example:

Press: MARK

SCALE

The numbers that indicate the

depth or scale may be deleted if

desired. Pressing the SCALE key

once will stop

the printing of the

scale numbers. The scale may

displayed again by pressing the

SCALE key.

Remember, the scale may

displayed at any time by pressing

the 2nd key and then the SCALE

key.

Example:

Press: SCALE

—

FIGURE 18

MEMORY/RESET

The Lowrance X-16 has an

internal battery

that keeps power

supphed to the memory circuits

even when

the

power switch is

turned off. The power cable may

be unplugged from the unit and

the X-16 will still remember the

last settings that were in effect

when the unit was turned off or

removed from the boat. To reset

the X-16's functions to their factory

settings, turn the unit on and

press the 2nd key and then press

the MARK key. The unit will then

be set up as follows:

FUNCTION

RANGE

DISCRIMINATION

PULSE WIDTH

SUPPRESSION

PRINT INTENSITY

PAPER SPEED

5CC

PAPER SAVE

The SCC

control tracks the

lower limit depth range and works

on the upper

60% of the chosen

range, with zero always being the

upper

limit, regardless of the

upper limit displayed on the

paper

The maximum effective depth for

SCC is 255 feet.

The effect on surface clutter

should immediately be seen. Use

only the amount of SCC

required

to reduce the clutter, as fish

signals can be eliminated by using

this method, also.

If you wish to turn the 5CC

function OFF, simply press 0 -

SCC and the SCC function will be

disabled.

12.0 - t2.0—

240 240—

36.0 26.0

49.0

60.0 FT

—

— LOl/RANCE 60.0 st

FIGURE 38 -

SCC: 2

SUPPRESSOR

The Suppressor is a noise

suppression system consisting of

a patented pulse

length

discrimination suppression circuit.

It is the same as the one used on

all Lowrance variable suppression

flashers and graphs. Basically, it

works on the

principle that most

noise

pulses are of relatively short

duration, If the receiver circuit can

be adjusted so that it

will accept

only long pulses, then the short

pulses will be cancelled out, and

only the

desired information (fish,

bottom, structure, etc.) will be

displayed. Of course, the

transmitter's pulse length would

have to be increased at the same

time

so that the return echoes

would be accepted by the receiver.

This is exactly what the

Lowrance suppression system

does. The

transmitter's pulse

length is increased by using the

keyboard, and the receiver 'tracks"

the amount of increased pulse

length, cancelling out any narrow

noise

pulses, and displaying only

the return echoes from fish or the

bottom, etc. (Note: receiver

sensitivity is not diminished at all

by this process.)

Noise, in electronic terms, is

any undesired signal. It can be

caused by an electrical source,

(such as the engine's ignition

system) or by air bubbles in

disturbed water which is called

cavitation. In both cases, the noise

could produce unwanted marks on

the paper. (See Figures 39 & 40.)

Fortunately, noise pulses are

relatively short in time

compared

to real sonar signals. Increasing

the Suppression will cause the

system to reject these unwanted,

short pulses without

reducing the

sensitivity in any way.

This patented design is

exclusive with Lowrance. However,

with high suppression settings, the

Example: Turn lines off:

Press: LINES key

12.0

240

36.0

40.0

60.0FT

12.0

240 -

36.0

40.0

60.OFT 91

FIGURE 17

12.0

24.0

26.0

40.0

L0URAMCE LEVEL

0-60 FEET

0 (automatic)

FIGURE 39

to 19

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