HP 460A Bedienungsanleitung

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INSTRUCTION

AND

OPERATING

MANUAL

FOR

MODEL

460A

WIDE

BAND

AMPLIFIER

Serial

1996

and

Above

HEWLETT-PACKARD

COMPANY

275

PAGE

MILL

ROAD,

PALO

ALTO,

CALIFORNIA,

U.S.A.

#460A004

General

Description

The

Model

460A

Wide

Band

Amplifier

designed

faithfully

am-

plify

extremely

short

pulses

without

objectionable

ringing

over-

shoot.

The

high

frequency

response

matches

the

Gaussian

curve.

gain

obtained

with

this

amplifier

five

ampli-

fiers

may

cascaded

for

additional

amplification.

The

Model

460A

useful

general

laboratory

amplifier,

increase

voltmeter

and

oscilloscope

sensitivity,

and

television

work.

Parts

Substitutions

Difficulties

procuring

some

the

parts

used

this

instrument

may

cause

the

electrical

physical

values

deviate

from

those

shown

this

instruction

manual.

These

substitutions

have

been

made

not

impair

the

performance

this

instrument

Whenever

replacement

any

these

parts

necessary,

either

the

substitute

value

the

original

value

may

used.

SPECIFICATIONS

FOR

c§j)

MODEL

460A

WIDE

BAND

AMPLIFIER

FREQUENCY

RESPONSE:

GAIN:

OUTPUT:

INPUT

IMPEDANCE:

NOISE

FACTOR:

DELAY

CHARACT

ERISTICS:

RISE

TIME:

POWER

SUPPLY:

SIZE:

WEIGHT:

High

Frequency

closely

matches

Gaussian

curve

when

operating

into

lOO-ohm

resistive

load.

point

140

mc.

Low

Frequency

when

operating

from

200-ohm

source

and

blocking

condenser.

frequency

response

off

into

open

circuit

succeeding

amplifier.

When

operat-

ing

into

200

-ohm

load,

off

100

kc.

With

c§j)410B

VTVM

when

used

with

c§j)

46A

-95D

Adapter.

response

i:1

db.

ZOO

200

MC.

Approximately

into

ZOO-ohm

load.

Gain

control

has

range

db.

Five

amplIfiers

may

cascaded.

Approx.

8 v

peak

open

circuit.

Output

impedance,

300

ohms.

ZOO

ohms.

Less

than

db.

Approx.

sec.

Approx.

00z6

sec.

(10%

90%

amplitude).

appreciable

over-

shoot.

115/Z30

±10%.

50/1000

CPSD

watts.

19"

relay

rack

panel.

5-1/4"

high;

6-3/4"

deep.

pounds.

SECTION

OPERATING

INSTRUCTIONS

1-1

INSPECTION

This

instrument

has

been

thoroughly

tested

and

inspected

before

being

shipped

and

ready

for

use

when

received.

After

the

instrument

unpacked

should

carefully

inspected

for

damage

received

transit.

any

shipping

damage

found

the

procedure

outlined

the

"Claim

for

Damage

Ship-

ment"

page

the

back

this

instruction

book.

1-2

CONTROLS

AND

TERMINALS

This

toggle

switch

controls

all

the

power

supplied

the

instru-

ment

from

the

powe

line.

s::

-.J:)

0"-

....

!-f

1-3

I.!)

0"-

....

-:t'

-.J:)

-:t'

GAIN

This

variable

resistor

controls

the

gain

the

amplifier.

FUSE

The

fuseholder

contains

a 006

ampere

cartridge

fuseo

The

fuse

may

replaced

unscrewing

the

fuseholder

cap

and

inserting

new

fuseo

Replacement

fuses

for

this

instrument

should

the

llslow

blow"

type

specified

the

Replaceable

Parts

Lista

INPUT.

OUTPUT

JACKS

AND

ACC

ESSORIES

The

input

and

output

jacks.

located

the

control

panel.

fit

special

connectors

and

cables

which

have

been

designed

for

use

with

Model

460A

because

not

possible

obtain

the

best

performance

with

this

type

device

standard

commercially

available

connectors

are

used

The

accessories

listed

below

are

not

supplied

with

the

instrument.

These

accessories

are

designed

solve

special

connection

problems

likely

encountered

the

use

the

Model

460A

The

acces-

sories

may

purchased

from

the

Hewlett-Packard

Companyo

cffp

MODEL

46A-16A

DESCRIPTION

Patch

Cord

Special

200

ohm

cable

two

feet

length.

complete

with

two

No.

46A-

95B

Cable

Plugs.

for

inter-connection

two

amplifiers

cascade.

-1-

MODEL

NO.

46A-16B

DESCRIPT

Patch

Cord

Same

No.

46A-16A

except

six

feet

length.

46A-95A

Panel

Jack

Special

low

capacita.nce

panel

jack

designed

for

ZOO

ohm

cable.

Mates

with

Nos.

46A-16A

and

46A-16B

Patch

Cords

No.

46A-95B

Cable

Plug.

Requires

1-1/8

inch

diameter

mounting

hole.

46A-95B

Cable

Plug

Low

capacitance

plug

de-

signed

for

use

with

ZOO

ohm

cable

Mates

with

No.

46A-95A

Panel

Jack

and

with

No.

46A-95E

Connector

Sleeve.

8lZ-5Z

Cable

Special

ZOO

ohm

cable

available

lengths

meet

customer

req"Girements.

The

input

circuit

the

Model

460A

terminated

transmission

line

with

characteristic

impedance

ZOO

ohms.

The

output

circuit

has

impedance

Z80

ohms

(resistive)o

The

load

impedance

determines

the

gain

the

amplifiero

Therefore,

not

necessary

match

the

load

the

output

the

amplifier

unless

the

gain

adversely

affected.

Shown

below

are

two

dia-

grams

for

connecting

matched

unmatched

load

the

Model

460A

using

ZOO

ohm

cable.

I-'

-.D

11l

Adapter

for

connection

5XP

CRTo

Ohm

Adaptor

Provides

cyp~

con-

nection

for

coupling

ohm

transmission

line

the

input

Model

460A

amp_i£ier~

Includes

terminating

resistor.

Connector

Sleeve

Provides

for

joining

two

46A-95B

C3.ble

Plugs

order

interconnect

two

lengths

ZOO

ohm

cable

Adaptor

for

Model

410A/B

Voltmeter

Probe

Consists

bayonet

type

sleeve

with

which

Model

410A/B

Probe

may

directly

connected

the

output

Model

460A

Amplifier

Includes

the

proper

compensating

components.

46A-95F

46A-95E

46A-95C

46A-95D

OPERATION

1-4

-Z

200

ohms

load

-(<e-T-(-~'~--

...

Model

460A

OUTPUT

Model

460A

OUTPUT

Connect

across

output

Jack

inside

ins

rument

--<~--f(-"+-\

--+~

620

any

ohms

load

#812-52

200

ohm

cable

The

GAIN

control

will

vary

the

gain

the

amplifier

over

ange

approximately

db.

This

control

provided

that

the

gain

the

amplifier

can

set

known

value

necessary.

There

feedback

the

amplifier

the

gain

directly

propor-

tional

the

tubes.

The

gain

also

determined

output

load

and

will

vary

with

output

load

accordance

with

relation

280

The

Wide

Band

Amplifier

can

used

with

the

0jJ

Model

410B*

Vacuum

Tube

Voltme

provide

additional

sensitivity

meas-

uring

high

frequencies.

special

adaptor

ailable

connect

the

probe

the

Model

410B*

the

output

terminal

the

amplifi

The

overall

frequency

response

the

Model

460A.

combination

with

the

Model

410B.

within

out

190

mc.

This

combI-

nation

will

give

full

scale

meter

reading

the

Model

410B

with

1/ 10

volt

applied

the

input

the

Model

460A.

Several

amplifiers

can

cascaded

when

than

gain

desired.

The

maximum

gain

which

can

used

will

limited

the

effective

noise

generated

the

input

circuit

the

amplifier.

The

noise

factor

approximately

db.

The

time

rise

single

unit

approximately

millimicro-

seconds.

units

are

cascaded

the

time

rise

goes

the

square

root

the

sum

the

squares

times

rise

individual

stages.

Therefore.

for

two

stages

cascadeD

the

time

Also

Model

4l0A

-3

rise

will

approximately

millimicroseconds

and

for

three

stages,

the

time

rise

will

approximately

4.4

millimicro-

seconds.

1-5

CIRCUIT

DESCRIPTION

The

Model

460A

new

type

amplifier

which

has

very

wide

transmission

band.

has

two

stages

with

five

tubes

the

first

stage

and

seven

tubes

the

second

stage.

The

grids

these

tubes

are

connected

along

one

transmission

line

for

the

input

cir-

cuit

and

the

plates

the

tube

are

connected

along

second

transmission

line

for

the

output

circuit.

wave

traveling

down

the

input

line

excites

the

grids

succession

and

half

the

cor-

responding

wave

generated

the

plate

circuit

travels

down

the

plate

line

toward

the

output

and

reinforced

each

successive

plate.

The

part

the

wave

plate

line

which

travels

the

reverse

direction

absorbed

termination

the

other

end

that

line.

the

time

the

wave

the

plate

line

reaches

the

out-

put,

has

been

amplified

about

db.

The

second

stage

adds

another

make

total

gain

for

the

unit.

The

Model

460A

will

amplify

pulses

with

extremely

short

rise

time

and

with

tually

overshoot.

The

time

rise

the

amplifier

itself

approximately

2.6

millimicroseconds.

The

amplifier

has

amplitude

response

closely

matching

the

Gaussian

Curve,

which

the

ideal

transmis

sion

for

pulse

amplifications

when

ringing

overshoot

cannot

tole=ated.

-4-

1000

100MC

10NC

fllEQUENCY

INC

",.

..........

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......:

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Amplifier

with

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Voltmeter

Adapter

B •

Amplifier

working

into

200.1\-

Resistance

Load

Gaussian

Curve

Optimum

for

Pulse

100

.........

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RESPONSE

CURVES

MODEL

460A

WIDE

BAND

AMPLIFIER

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SCHEMATIC

DIAGRAM

MODEL

460A

TRANSFORMER DETAIL

11''''

}>OY

II!V

WIDE BAND

AMPLIFIER

SER I

19968

ABOVE

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