Sharp R-309B Instruções de Operação descarregar pdf (Página 13)

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SECTION 3

OPERATING INSTRUCTIONS

3.1

Iuu-oduction

Section

3

contains

instructions

for

operating

the

CE-7

Multi-Channel

FM

Communications

Monitor,

and

includes

f

functional

description

of

all

controls

and

indicators.

Refer

to

Table

3-1.

The

CE-7

can

be

operated

on

one

of

three

modes,

depending

on

the

position

of

the

black

/red

concentric

control

knob

located

on

the

left

side

of

the

front

panel

directly

below

the

MULTI-CHANNEL

MONITOR.

NOTE

For

the

purpose

of

discussion

the

5-position,

outer

black

knob

will

be

referred

to

as

the

"function

switch"

throughout

this

manual.

In

the

FREQ.

-DEV.

MEASURE

position

of

the

function

switch

the

CE-7

operates

as

a

receiver-monitor.

The

incoming

signal

is

applied

through

the

ANT.

con-

nector

on

the

Broadband

Mixer

or

Preselector,

either

from

an

antenna

or

other

signal

source.

The

received

signal

frequen

cy

is

measured

by

selecting

the

assigned

carrier

fr-equency

of

the

trans-

mitter

by

means

of

the

CARRIER

FRE-

QUENCY

SELECTOR

switch

and

reading

the

frequency

error

on

the

FREQUENCY

meter.

Simultaneous

with

the

freq

uency

error,

modulation

deviation

is

indicated

by

the

FM

DEV

IA

TION

meter

on

the

Model

302

FM

Deviation

Meter

or

on

the

screen

of

the

Model

301

Oscilloscope,

whichever

is

used.

A

built-in

speaker

makes

the

modulation

on

the

incoming

carrier

audible.

In

the

CAL.

/ CW

or

FM

position

of

the

function

switch

the

CE-7

operates

as

a

signal

generator.

The

desired

signal

Vv

, ' I ; ' .

frequency

is

selected

by

means

of

the

CARRIER

FREQUENCY

SELECTOR

switch.

The

generated

signal

(CWor

FM)

is

available

at

the

SIGNAL

GENERA

TOR

OUTPUTconn<?ctor.

The

"

attenuator

pro-

vides

caHbrated

outputs

of

jLto...J, 0 to

10,

or

0 to

100

microvolts

when

the

.2

.Q

.-_d B

fixed

atten

u

ator

-is

used.

When

FM

has

heeii

selected

(instead

of

CW)

the

modulation

can

3-1

5601"0015"1

be

varied

from

zero

to 25 kHz

deviation.

The

FM

DEVIATION

mete

ror

the

oscillo-

.

scopecan

also

be

used

to

read

the

modula-

tion

of

this

generated

signal.

An

internally-

generated,

I-kHz

modulating

frequency

or

an

external

audio

source

can

be

used.

In

the

1.

F.

position

of

the

function

switch

the

CE-7

operates

as

a

generator

of

frequen-

cies

that

are

usually

found

as

IF

frequencies

in

communications

receivers.

The

desired

frequency

is

selected

by

means

of

the

1. F.

GENERA

TOR

SELECTOR

switch.

The

gen-

erated

IF

frequency

is

ava

ilable

at

the

1. F.

GENERA

TOR

OUTPUT

connector

and

its

level

is

varied

by

means

of

the

1. F.

GENERA

TOR

LEVEL

control.

When

setting

the

SELECTOR

switch,

refer

to

the

Channel

Frequency

Chart

located

inside

the

front

cover

of

the

CE-7

for

the

position

associated

with

the

desired

IF

fre-

quency.

See

Paragraph

3.4.5

for

installation

and

remova

1

of

IF

Oscillators.

3;2

Controls

and

Indicators

The

Model

CE-7

controls

and

indicators

are

listed

in

Table

3-1.

For

all

other

equip-

ment

or

accessories,

refer

to

the

applicable

equipment

manuals.

3.3

Starting

Procedure

a.

Plug

the

power

cord

into

an

ac-

power

outlet

(115

volts,

50 to

400

Hz)

and

energize

the

set

by

means

of

the

power

switch

on

the

VOLUME

POWER

OFF

control.

NOTE

The

Crystal

Oven

"As s em bly

is

energized

as

soon

as

the

CE-7

powereord

is

plugged

in.

b.

Ascertain

that

the

channel

pilot

light

is

on,

c.

Allow

the

CE-7

to

warm

up

for

ap-

proximately

30

minutes.

The

OVEN

ON

light

will

begin

to

cycle

on

and

off.

If

the

CE-7

has

been

stored

at

temperatures

below

32

°F

additional

warm-up

time

may

be

required.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 95 96

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