HP 335E Manual del propietario

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OPERATING

AND

SERVICING

MANUAL

,,.

RECEIVED

MAY

6

1966

MODEL

·

335E

TV

MONITOR

TYPE

2

MOSELE't

ASSOCIATES,

Inc.

FCC

APPROVAL NO.

3-110

Copyright

HEWLETT-PACKARD

COMPANY 1960

1501

PAGE

Mil.L

ROAD,

PALO

ALTO,

CALIFORNIA,

U.S.A.

...

Printed

3/60

www.SteamPoweredRadio.Com

AURAL DEVIATION

METER

Range:

Accuracy:

AURAL MODULATION

METER

Rang

e:

Accuracy:

Polarity:

PEAK

MODULATION INDICATOR

Range:

Polarity

:

AUDIO

OUTPUT

High

Impedance:

Low

Impedance:

Freq

u

ency

Response:

VISUAL

DEVIATION

METER

Range:

Accuracy:

SPECIFICATIONS

±

3 kc

from

assigned

center

frequency.

±

500

cps

for

30

days,

channels

2-13

.

± 500

cps

for

10

days,

channels

14-83

.

Model 335E

0

to

133%

(25-kc

swing

equals

100%).

Also

calibrated

in

db

from

-10

to

+2

(0

db

equals

100%

modulation).

Indicates

modulation

percentage

within

±5%

for

modulation

frequencies

between

SO

and

15,000

cps.

Responds

to

positive

or

negative

peaks

as

selected

by

front

panel

switch.

Flashes

when

any

preset

modulation

level

is

reached

between

50%

and

120%.

Responds

to

positive

or

negative

peaks

as

selected

by

front

panel

switch.

10

volts

into

100,

000

ohms,

unbalanced,

at

100%

modulation

at

low

frequencies.

Distortion

less

than

.25%

at

100%

modulation

.

Noise

at

least

65

db

below

output

level

cor-

responding

to

100%

modulation

at

low

frequencies.

l

milliwatt

(0 VU)

into

600

ohms,

balanced,

at

100%

modu-

lation

at

low

frequencies.

Flat

within ±

.5

db

from

50

to

15,000

cycles,

with

standard

75-m

i

crosecond

de-emphasis

.

±

3

kc

from

assigned

frequency

.

±

500

cps

for

30

days,

channels

2-13.

±

500

cps

for

10

days,

channels

14-83.

ii

~

www.SteamPoweredRadio.Com

Model

335E

SPECIFICATIONS

(CONT'D.)

RECEIVED

INTER-CARRIER

SP

ACING

MAY

6

1966

MOSELE't

ASSOCIATES(

ln

Range:

Accuracy:

GENERAL

RF

Power

Required:

Frequency

Range:

Power

Required:

± 3 kc

from

4,5

me.

±

500

cps

for

6

months.

Less

than

1

watt

from

each

transmitter.

Separate

type-N

connectors

provided

for

aural

and

visual

inputs.

Any

television

broadcast

channel

as

specified

from

2

to

83,

including

offset

channels.

115

volts±

10%,

60

cycles,

280

watts.

Ambient

Operating

Temperature:

Unit

must

be

mounted

where

ambient

temperature

will

not

exceed

45oC

(113°P).

Space

Required:

Weight:

Accessories

Furnished:

Accessories

Available:

Unit

mounts

in

a

standard

19-inch

rack

and

requires

12-1/4

inches

of

vertical

space

and

is

approximately

15-inches

deep.

Approximately

68

lbs.

Shipping

approximately

107

lbs.

2

125-UG21B/U

Type-N

Connectors

for

rf

inputs.

External

Aural

Deviation

Meter

Assembly,

335E-95F.

External

Aural

Modulation

Meter

Assembly,

335E-95G.

External

Visual

Carrier

Deviation

Meter

Assembly,

335E-95H

.

....------------------

CAUTION

--------------

----,

CIRCUIT DAMAGE MAY

RESULT

FROM

EXCESSIVE

RF

INPUT

TO

THIS INSTRUMENT. FOLLOW

THE

INSTRUC-

TIONS

IN

PARAGRAPH

2-1

TO

ADJUST

RF

INPUT

LEVEL.

iii

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SECTION I

SECTION II

SECTION

III

SECTION IV

SECTION V

CONTENTS

DESCRIPTION AND INSTALLATION

l

-l

Description.

.

l -

2

Installation

1

-

3 Input

Connectors

.

1 -4

Output

Connectors

.

OPERATING

INSTRUCTIONS

2 - 1

2 - 2

2 - 3

2 - 4

2 - 5

Initial

Operation

and

Tran

s

mi

tter

Coupling

Adjustment

Periodic

Calibration

....

. .

Master

Oscillator

Adjustment.

. .

Daily

Operating

Procedure

....

Aural

Amplitude

Modulation

Check

THEORY

OF

OPERA

Tl

ON

3 - 1

3 - 2

3 3

3 4

3 5

3 6

3 7

3 8

3 9

General

Operation

. •

Master

Oscillator

Multipliers

Aural

Mixer

. . . .

Aural

Amplifier,

Discriminator,

and

Deviation

Meter

Audio

Circuits

and

Modulation

Indicators

. . . . . . .

Visual

Mixer

and

4.3535-MC

Oscillator/Mixer

....

Visual

Amplifiers,

Discriminators,

and

Deviation

Meter

.

Power

Supply.

. . . . . . . . . . . . . . . . . . . . • . .

MAINTENANCE

4 - 1

4 - 2

4 - 3

4 - 4

4 - 5

4 -

6

4 - 7

4 - 8

4 -

9

4 -

10

4 -

11

4 -

12

4 - 13

4 - 14

4 -

15

Introduction

. . . . . . . . • .

Meter

Lamp

Replacement

. . .

Removing

Instrument

from

Rack

Troubleshooting

.

Tube

Replacement

.

Oven

Maintenance

. .

Power

Supply

Check

.

Audio

Amplifier

Check

Aural

Calibration

. .

Peak

Modulation

Indicator

.

Visual

and

lntercarrier

Calibration

.

Master

Oscillator

Adjustment

• . .

Multiplier

/Mixer

Tuning . . . . .

4.3535-MC

Oscillat9r

Adjustment.

150-KC

Oscillator

Check

.

....

TABLE

OF

REPLACEABLE

PARTS

5 - 1

Table

of

Replaceable

Parts

iv

Model

335E

PAGE

I - 1

I - 2

I -

3

II

- 1

II

- 1

II - 4

II

- 5

Ill

- 1

III

- 1

Ill

- 1

Ill

- 1

III

- 2

III - 2

III

- 3

III

- 3

III

- 3

IV

- 1

IV - 1

IV

-1

IV -1

IV

-

6

IV

-

6

IV -

8

IV

-

8

IV -9

IV

-

10

IV -

10

IV

-

10

IV

-

10

IV

-

11

IV

-

11

V - 1

www.SteamPoweredRadio.Com

Model

335E

Sect.

1

Page

l

SECTION

I

DESCRIPTION

AND

INSTALLATION

1-1

DESCRIPTION

The

t$jJ

Model

335E

Television

Monitor

is

a

com-

plete

transmitter

frequency

and

aural

modulation

percentage

monitor

tor

any

commercial

TV

channel

from

2

through

83.

Type

approval

number

3-110

has

been

issued

by

the

Federal

Communications

Commission

for

all

l$p

Model 335E

Type

2

TV

Monitors.

Continuous

indication

of

any

deviation

from

as-

signed

frequency

is

indicated

by

panel

meters.

In

addition,

any

deviation

from

the

standard

4.5

me

intercarrier

separation

may

be

read

directly.

A

meter

is

provided

to

monitor

aural

transmitter

modulation;

a

peak

modulation

indicator

lamp

flashes

a

warning

when

instantaneous

aural

modu-

lation

exceeds

any

preset

value

between

50%

and

120%. An

audio

output

is

also

provided

for

moni-

toring

and

measurement

purposes.

This

output

is

equipped

with

the

standard

75-microsecond

de-

emphasis

circuit.

The

Model

335E

can

also

be

used

for

performing

other

tests

required

for

proper

operation

of

a

television

station

such

as

the

measurement

of

in-

cidental

AM

of

the

FM

aural

carrier,

frequency

response

and

distortion

checks

on the

aural

trans-

mitter,

residual

noise

on

th

e

aural

carrier,

and

carrier

shift

with

modulation.

The

335E

utilizes

pivoted-drawer

mounting

within

the

rack

so

that

it

can

be

pulled

out

and

tilted

up

for

convenient

insp

ec

tion.

The

cabinet

for

the

335E

contains

the

drawer

mechanism

which

mounts

on

the

rack

frame.

The

instrument

chassis

is

easily

remov

ed

from

the

drawer

mounting

if

desired.

In

addition

to

this

manual,

the

following

items

are

included

with

your

instrument:

1)

Two

type

-N

connectors

(UG-21B/U).

2)

One

set

of

rack-mounting

hardware.

1-2

INSTALLATION

The

instrument

is

supplied

with

all

ne

cessary

hard-

ware

for

mounting

in

a

standard

19-inch

rack

that

has

been

drilled

and

tapped

for

12-24

mounting

screws.

The

vertical

height

requir

ed

is

approxi-

mately

12-1/4

inches.

The

rack

should

be

fastened

to

the

floor

for

stability.

For

easy

access

to

the

unit

when

it

is

out

of

the

rack,

it

is

suggested

that

the

instrument

be

mounted

so

the

bottom

of

the

panel

is

approximately

50

inches

off

the

floor.

The

unit

should

be

installed

in

a

well-ventilated

location

where

the

ambient

temperature

does

not

exceed

45oc

(113°F).

It

is

also

important

to

allow

sufficient

clearance

behind

the

unit

for

free

passage

of

air

out

of

the

dust

cover.

To

mount

the

335E

in

a

relay

rack

proceed

as

follows:

(D

Disconn

ec

t fan

power

cord

at

rear

of

the

instrum

e

nt.

Slide

instrument

from

cabinet

after

pushing

catches

on

chassis

rails.

www.SteamPoweredRadio.Com

Sect.

I

Page

2

Q)

Mount two

angle-brackets

in

rack

using

four

12-24

screws

supplied.

Make

sure

brackets

are

parallel

and

far

enough

apart

to

clear

cabinet.

0

Extend

chassis

slides

from

dust

cover

until

they

lock

in

position.

Engage

in-

strument

in

chassis

slides.

Depress

catches

to

lock

it

in

place.

1-3

INPUT

CONNECTORS

,

All

connections

are

made

at

the

back

of

the

335E

along

the

lower

edge

(see

Figure

1-1).

Allow

enough

slack

in

all

wires

and

cables

so

that

the

335E

will

slide

from

the

rack

without

disconnecting

cables.

A. POWER

LINE

The

three-conductor

power

cable

supplied

with

this

instrument

is

terminated

in

a

polarized

three-

prong

male

connector

recommended

by

the

National

Model

335E

(D

Fasten

cabinet

to

angle

brackets

with

six

8-32

screws

and

lockwashers

pro-

vided.

Adjust

angle

brackets

for

snug

fit.

(D

Connect

fan

cord

at

rear

of

in

str

ument.

Slide

335E

into

rack.

The

12-24

screws

should

come

through

holes

in

panel.

Attach

four

cap

nuts

provided.

Electrical

Manufacturers'

Association.

The

third

contact

is

an

offset

,

round

added

to

a

standard

two-blade

connector

which

grounds

the

335E

chassis

when

used

with

the

appropriate

receptacle.

Touse

this

connector

in

a

standard

two-contact

receptacle,

an

adapter

should be

used

to

connect

the

NEMA

con-

nector

to

the

two-contact

system.

When

th

e

adapter

is

used

th

e

ground

connection

becom

es

a

short

l

ea

d

which

should

be

connected

to

a

secure

ground.

Th

e

instrum

e

nt

should

be

connect

ed

to

a

115-volt

power

source

that

is

never

de-energized.

This

is

~

www.SteamPoweredRadio.Com

I

Model

335E

to

allow

the

crystal

oven

heater

circuit

to

operate

continuously

for

maximum

oscillator

stability.

Th

e

POWER

switch

on

the

panel

controls

all

the

power

applied

to

the

instrument

except

th

e

crystal

oven

heater

circuits.

B.

RF

INPUTS

Conn

ec

t

the

VISUAL

and

AURAL

RF

INPUT

conectors,

located

on

the

rear

of

the

instrument

with

the

appropriate

monitoring

outputs

provided

on

the

tran

smitte

r.

Table

1-1

lists

types

of

cable

and

connectors

which

can

be

u

sed

at

the

monitor.

Assembly

instructions

for

coaxial

connectors

are

given

in

Figure

1-2

and

1-3.

REMOTE

METER

JACKS

THERMAL

CUTOUT

RESET

0

I

~ I

<,

•·

•

4,

.,.,

u ,

w,

,nt

Q

0

~ -

CONNECT

TO

TRANSMITTERS

FAN

CONNECTOR

7-8

TO

REMOTE

PEAK

MOD

INDICATOR

4

-5

PROVIDE

HI-Z

AUDIO OUTPUT

SHORT

3-4

FOR

soon

OUTPUT

1-2 PROVIDE

600

.

fi

AUDIO OUTPUT

MP.S-5708

Fi~ure

1-1.

Rear

View Showing

Connectors

The

amount

of

rf

pow

er

required

from

the

trans-

mitters

for

prop

er

operation

of

the

335E

Monitor

is

very

small,

and

should

be

maintained

within

reasonably

close

limits

.

The

input

voltage

to

the

monitor

should

fall

in

the

range

of

0.05

volt

to

l.S

vo

lt

s.

The

value

incr

ea

ses

with

frequency

of

operation.

Adjustment

of

tran

smi

tter

coupling

is

de

scribed

in

paragraph

2-1.

Sect.

I

Page

3

TABLE

1-1.

INPUT

CABLE

AND

CONNECTOR

Cable

Connectors

RG-8

/U

UG-218/U

(furnished)

RG-

9/U

or

RG-9A/U

RG

-1

0/U

UG-21O/U

RG-55/U

UG-536/U

RG/58/U

Since

the

voltage

required

is

small,

care

must

be

taken

to

insure

that

excessive

rf

pow

er

is

not

coupled

into

the

monitor

which

can

result

in

severe

damage

to

the

input

circuits.

The

diodes

CR7

and

CR8

will

burn

out

if

overloaded.

If

the

monitor

seems

to

require

excessive

rf

input

for

proper

monitoring

l

eve

l,

check

th

ese

diodes

.

1-4

OUTPUT

CONNECTORS

All

connec

tions

ar

e

made

at

the

rear

of

the

335E

chassis.

Allow enough s

lack

in

all

wires

and

cables

to

permit

the

instrument

to

be

slid

from

the

ra

ck without

disconnecting

cables.

A. AUDIO

OUTPUT

Two

audio

output

voltages

are

available

on

the

terminal

strip

at

the

rearoftheinstrument:

A

bal-

anced

low-impedan

ce

output

for

monitoring

pur-

po

ses,

and

an

unbalanced

high-imp

e

dance

output

for

nois

e

and

distortion

measurement

purposes

.

Both

of

these

outputs

contain

the

standard

75-micro-

second

de-emphasis

circuit.

Only

one

of

these

out-

put

circuits

should

be

u

sed

at

a

time.

The

unba

l-

anc

ed

output

should

be

us

ed

for

distort

ion m

eas

ure-

ment

s

to

e

liminate

the

small

amount

of

distortion

introduc

ed

by the

output

tra

ns

form

er

in

the

bal-

anced

output.

A

balanced

low-impedance

output

(600

ohms)

is

availab

le

at

terminals

l

and

2

at

the

back

of

th

e

inst

r

ument

(see

Figure

1-1).

The

output

level

of

this

circuit

is

approximately

1

milliwatt

(0

VU)

into

a

600-ohm

circuit,

with 100%

modulation

at

low

frequencies

. A

connection

must

be

made

be-

tween

terminals

3

and

4

as

indicat

ed

on

the

sche-

matic

diagram,

before

the

low-impedanc

e

output

will

operat

e.

Double-conductor

shielded

cable

s

hould

be

used

for

this

circuit.

www.SteamPoweredRadio.Com

Sect.

l

Page

4

An

unbalanced

high-impedance

audio

output

is

available

between

terminals

4

and

5

at

the

rear

of

the

instrument.

When

the

unbalanced

output

is

in

use

there

should

be no

connection

between

ter-

minals

3

and

4.

The

output

level

of

this

circuit

is

approximately

10

volts

into

a

100,000-ohm

load

with

100%

modulation

at

low

frequencies.

Shielded

cable

should

be

used

for

this

circuit.

B.

REMOTE

INDICATORS

External

meters

may

be

used

with

the

instru-

ment

to

duplicate

all

three

panel

meters

at

some

remote

location.

Meters

for

remote

indication

may

be

ordered

from

the

Hewlett-Packard

Com-

pany.

Refer

to

Section

V,

Table

of

Replaceable

Parts,

for

procurement

instructions

and

stock

numbers.

Meters

should

be

mounted

in

a

non-magnetic

(e.g.

a

luminum)

panel

for

maximum

accuracy.

The

meters

may

be

illuminated

from

an

external

6.3-

volt

power

source.

Model

335E

1)

Aural

DeviatiQg:

The

remote

aural

deviation

meter

is

connected

to

J6

with

double

conductor

shielded

cable

and

a

three-circuit

phone plug.

The

positive

meter

terminal

should

be

connnected

to

the

tip

of

the

plug

and

the

remote

meter

mul-

tiplier

to

the

ring.

The

plug

sleeve

should

be

connected

to

the

cable

shield

at

the

instrument.

2)

Modulation

Aural

Carrier:

The

remote

mod-

ulation

meter

is

connected

to

J7

with

single

con-

ductor

shielded

cable

and

a

standard

two

conduc-

tor

phone plug.

The

positive

meter

terminal

should

be

connected

to

the

shield

(grou

n

d).

3)

Visual

Carrier

Deviation:

The

remote

visual

carrier

deviation

meter

is

connected

to

J4

with

single

conductor

shielded

cab

le

and

a

standard

two

conductor

phone

plug.

The

positive

meter

terminal

should

be

connected

to

the

s

hi

eld

(ground).

4)

Peak

Modulation

Indicator:

A

remote

peak

modulation

indicator

may

be

connected

to

termi-

nals

7

and

8

at

the

rear

of

the

instrument

.

This

indicator

should

be

a 3

or

6

watt,

type

S6, 120

volt,

incandescent

lamp,

mounted

in

a

suitable

socket.

www.SteamPoweredRadio.Com

Model

335E

Sect

. I

Page

5

ASSEMBLY

OF

UG-21B/U

CONNECTOR

AND

RG-9

/U

CABLE

Cut

the

RG-9/Ucabletothedesiredlength

.

Remove

3/4

inch

of

the

outer

protective

covering

from

the

end

of

the

cable.

Do

not

injure

the

shield

braid

when

cutting

the

outer

coveri

ng

.

Slide

the

shield

braid

back

and

remove

1/4

inch

of

the

die-

lectric

material.

Do

not

nick

the

center

conductor

wh

en

cutting

the

dielectric

.

Slide

shield

braid

back

over

the

end

of

the

center

conductor

and

taper

to

allow

connector

parts

to

slide

over

cable.

Assemble

the

parts

of

the

connector

on

the

cable

as

shown.

Slide

end

fitting

D down

until

it

fits

tightly

over

the

outer

plastic

covering

of

the

RG-9/U.

Unbraid

and

fan

the

shield

braid

over

the

tapered

end

fitting.

Trim

the

shield

braid

around

the

edge

of

the

end

fitting

as

indicated.

Cut

the

dielec

tric

1/8

inch

from

t

he

shield

braid.

Do

not

nick

the

center

conductor

when

cutting

the

dielectric.

Cut

off

the

center

conductor

1/4

inch

from

the

dielectric.

Slide

tip

E

over

the

center

conductor

and

solder

in

place.

Do

not

apply

excessive

heat

when

soldering

the

tip

in

place

as

it

will

melt

the

dielectric

.

If

the

dielectric

is

slightly

bulged

after

soldering

the

tip

in

place,

it

will

be

necessary

to

trim

it

to

conform

to

the

large

diameter

of

the

tip

so

that

it

will

fit

properly

into

the

outer

shell

.

Pl

ace

outer

shell

F

over

the

cable

end.

Tip

E

should

slide

into

shell

F

until

it

is

flush

with

the

end

of

the

shell.

Now

tighten

the

assembly

by

turning

nutA

while

holding

the

outer

shell.

Figure

1-2

~

-"

.!."

4

www.SteamPoweredRadio.Com

Sect.

I

Page

6

ASSEMBLY

OF

UG-536/U

CONNECTOR

AND

RG-55/U

CABLE

Cut

RG-55/U

cable

to

the

desired

length.

Remove

3/4

inch

of

the

outer

protective

covering

from

the

end

of

the

cable.

Do

not

injure

the

shield

braid

when

cutting

the

outer

covering.

Slide

back

the

shield

braid

and

remove

1/4

inch

of

the

die-

lectric

material.

Do

not

nick

the

center

conduct

or

when

cutting

th

e

dielectric.

Slide

shi

e

ld

braid

back

over

the

end

of

the

center

conductor

and

taper

to

allow

connector

parts

to

slide

over

cable.

Ass

e

mbl

e

the

parts

of

the

connector

on

the

cable.

Slide

end

fitting

D down

until

it

fits

tightly

over

the

outer

plastic

covering

of

the

RG-55/U

cable.

Unbraid

and

fan

the

shield

braid

over

the

tapered

end

fitting.

Cut

the

dielectric

1/8

inch

from

the

shield

braid.

Do

not

nick

the

center

conductor

when

cutting

the

dielectric.

Cut

off

the

center

conductor

1/4

inch

from

the

dielectric.

Tin

the

exposed

inner

conductor.

Do

not

apply

e

xcessive

heat

to

the

center

conductor

as

this

will

melt

the

dielectric.

Slide

tip

E

over

th

e

center

conductor

and

solder

in

place.

Do

not

apply

excessive

heat

when

soldering

the

tip

in

place

as

it

will me

lt

the

dielectric.

If

the

dielectric

is

slightly

bulged

after

soldering

the

tip

in

place,

it

will

be

necessary

to

trim

it

to

conform

to

the

large

diameter

of

the

tip

so

that

it

will

fit

properly

into

the

outer

shell.

Place

the

outer

shell

F

over

the

cable

end.

Tip

E

should

slide

into

shell

F

until

it

is

flush

with

th

e e

nd

of

the

shell.

Now

tighten

the

assembly

by

turning

nut

A

while

holding

the

out

er

sh

e

ll.

Figure

1-3

r:::,

....

Model

335E

HP 335E Manual del propietario

Manuales populares de Monitor de otras marcas