Sharp R-309B Instruções de Operação descarregar pdf (Página 15)

Table 3-1. Conlrols and

Indicators

(Continued)

NAME

REF

DESIG.

FUNCTION

DEV.

ADJ.

R4

Black/red

concentric

controls

used

when

the

FM

CAL.

R5

function

switch

is

in

the

FM

position.

The

outer

black

control

knob,

DEV

.ADJ.,

permits

adjustment

of

the

arri'ounr

of

deviation

of

the

FM

signal

generator

output

and

the

level

of

the

in-

ternally

gen

erated

I-kHz

output.

The

inner

r

ed

control

kn09J

FM

CAL.,

permits

adjustment

of

the

generated-

Fl\'1

center

frequency.

The

FREQUENCY

meter

is

automatically

in

the

±5.0

kHz

range

when

the

function

switch

is

in

FM.

FM

MOD.

INT.-EXT.

1

kHz

OUT

S6,

J2

With

the

function

switch

in

the

FM

position,

the

FM

MOD.

switch

permits

selection

of

the

modu-

lation

source.

In

EXT.,

an

external

modulation

signal

can

be

applied

through

the

BNC

connector

just

below

the

switch.

In

INT.

I

an

external

I-kHz

source

is

turned

on.

This

same

I-kHz

signal

is

available

at

the

BNC

connector

for

external

use.

CRYSTAL

OUT

AUX.

IN

J4

A

ENC-type

female

connector

which

provides

the

capability

to

monitor

the

crystal

frequency

of

the

selected

channel.

(The

output

level

should

be

greater

than

600 mv

unterminated.)

It

also

provides

a

connection

point

for

23

additional

crystal-controlled

frequencies

from

the

l\Iodel

MCO-6

Multi-Channel

Oscillator.

FREQUENCY

BELOW

40 MHz - ABOV E 40 MHz

S3

Permits

reversing

the

polarity

of

the

FRE-

QUENCY

meter

so

any

carrier-frequency

error

measured

will

always

be

indicated

in

the

correct

direction.

This

is

also

applicable

to

the

Model

301

Oscilloscope.

(When

operating

BELOW

40

l\'1Hz

the

CE-7

local-oscillator

fre-

quency

is

higher

than

the

frequency

to be

monitored.

)

HARM.

AMP.

TUNING

SIGNAL

GENERA

TOR

C5

Permits

tuning

of

the

harmonic

amplifiers

for

the

selected

RF

channel.

Tuning

is

indicated

on

the

FREQUENCY

meter.

Refer

to

the

Channel

Frequency

Chart

for

approximate

settings

associated

with

each

channel

listed.

LEVEL

SET

R7

When

set

to

the

number

listed

with

the

desired

carrier

frequency

on

the

Channel

Frequency

MICROVOLTS

(Attenuator

Vernier)

R8, R9

Chart,

the

signal-generator

output

level

will

be

as

indicated

by

the

MICROV

OLTS

(0. 1 to

1.

0

microvolts)

and

Xl,

XlO,

XIOO

(Multiplier)

Xl,

XlO,

XIOO

(Multiplier)

S7

settings.

The

20-dB

fixed

attenuator

must

be

used.

OUTPUT

J3

A

ENC-type

female

connector

which

provides

signal

generation

output

for

the

frequency

selected.

3-3

5601··0015··1

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 95 96

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