Eagle Mach 1 Specifications download pdf (Page 9)

1.

INTRODUCTION

Small boat sonar

systems

are

routinely

used to measure water

depth,

examine

bottom

contours,

and locate fish. The

Eagle

MACH 1 recorder

goes

far be-

yond

the

ordinary

in

displaying

these

objects, plus many

more

such as schools of

baitfish,

algae

and

plankton,

thermoclines,

indi-

vidual fish closer than six inches

apart,

and much more. These

features combine to make the

MACH 1 a

superior graph

re-

corder for

today's sportfishing

industry.

2. HOW IT WORKS

When the unit is turned

on,

an

electronically regulated

motor

drives a

lightweight

belt located

at the

right edge

of the

rqcording

paper.

The

marking stylus

is at-

tached to the belt. When the

sty-

lus is at the

top

of the

paper

a

small mark is made. This is called

the zero

mark,

and

represents

the

surface of the water. The

stylus

continues to move down the

edge

of the

paper

while the sound

pulse

is

traveling through

the wa-

ter,

and when an echo is de-

tected,

the

stylus

makes another

mark on the

paper.

The

depth

of

the

object

which reflected the

echo can be read

in feet

by

com-

paring

its location on

the

paper

to

the

depth

scale

printed

on the

paper.

A

constant

speed

motor drives

the

paper graph. (The paper

is

treated so that the

stylus

will burn

it to leave a

permanent

black

mark.)

During

one revolution of

the

stylus

belt,

a

very

narrow

mark will be made

by

the flexible

stylus,

but the

paper

will move a

small amount before the next rev-

olution. Each mark will blend into

the one

before,

so that a

compos-

ite

'picture"

of the

target

will be

made,

one

tiny

mark at a time.

Due to the

many

features that

this unit

has,

we have

split

the

operation

section of this manual

into two sections. The first

part,

Section

III,

is entitled "Basic

Op-

eration" and covers

everything

that is

absolutely necessary

to

use

your

EAGLE in a wide

variety

of situations. It will tell

you

how to

use the basic controls

—

Sen-

sitivity, Suppressor, Paper Speed,

GRAYLINE,

Range,

Marker,

plus

a

few

special

functions. This sec-

tion will be

adequate

for most

situations.

However,

once

you

have mastered the basic

opera-

tion of the EAGLE MACH

1,

as

described in Section

Ill,

you may

wish to

try

some of the features

tA

1,

Figure

41

-

a

1:::

Figure

40

RANGE:

60 FEET

ZOOM: OFF

SENSITIVITY:

314

Mi

2

p

2H

A3

r

-.

-'

HO

SUPPRESSOR: MINIMUM

LINES: ON

PAPER SPEED: 3/4

GRAYLINE: MINIMUM.

SUPPRESSOR: MINIMUM

LINES: OFF

PAPER SPEED: MAXIMUM

GRAYLINE: MINIMUM

RANGE: 60 FEET

ZOOM: OFF

SENSITIVITY: 3/4

PULLEY

DRIVE

STYLUS

DRIVE

BELT

STYLUS

Figure

Figure

42 RANGE:

80

FEET

SENSITIVITY: MAXIMUM

SUPPRESSOR: MINIMUM

PULLEY

2

19

ZOOM: OFF

PAPER SPEED:

MAXIMUM

LINES: OFF

GRAYLINE:

MINIMUM

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