HP 212A Service manual

PULSE

GENERATOR

SERIALS PREFIXED

:

419

OPERATING AND SERVICING MANUAL

PRINTED

10

-

59

OPERATING AND SERVICING MANUAL

FOR

MODEL 212A

PULSE GENERATOR

Serials Prefixed:

419-

Copyright

275

PAGE MILL ROAD, PAL0 ALTO, CALIFORNIA, U. S. A.

HEWLETT -PACKARD COMPANY

1954

SPECIFICATIONS

PULSE

PULSE

PULSE

AMPWTUDE

INTERNAL

REPETITION

PULSE

LENGTH:

AMPLITUDE:

POLARITY:

CONTROL:

PULSE

SHAPE:

JITTER:

IMPEDANCE:

RATE:

SYNC

SYNC

OUT:

POSITION:

IN:

At

least

0.07

At

least

50

volts

Positive

(a)

(b)

(a)

(b)

Less

50

(a)

(b)

Positive

(a)

(b)

(c)

(a)

(b)

(c)

or

Negative.

50

db

attenuator,

Cantinuoualy variable

Rise

and

(10% to

Crest

variation

than

0.01

ohms

or

less

Internal

External

or

negative,

25

volt5

Duration,

Rise

time,

Delay,

repetition

Delay.

repetition

Advance,

repetition

to

10

microaeconda,

peak

into

variable

decay

time

approximately

90yoo),

less

than f 5%

microseconds.

on

either

~ynchronization,

8

ynchronization,%Z

poaitive

approximately

approximately

0

to

100

rate

0

to

50

rate

0

to

rate

pulse

5

volts

or

15

microseconds

up

to

2500

micraseconds

up

to

5000

10

microseconds

up

to

5000

50

ohm

in

control

polarity.

50

peak

voIte

negative

1

microsecond

0.25

pps.

pps.

pps.

continuously

load

(50

watts

10

db

steps.

with

range

0.02

of

average

to

5,

000

5,

000

pps.

pps.

to

minimum.

into

microseconds.

after

Bync

after

sync

out

after

sync

variable.

peak

J.

of

at

least

microseconds

peak

amplitude.

2,

000

half

pulse

pulse

out

pulse

ohm

voltage

with

at

out

10

load.

with

with

db.

points.

I

I

POWER

ACCESSORIES

CONNECTORS:

SUPPLY:

(a)

(b)

1151230

DIMENSIONS: Cabinet

Rack

WEIGHT:

Cabinet

Rack

AVAILABLE:

@I

AC-16F

AC-E6K

#17

Rack

Main pulse,

Sync

volts

Mount:

Mount:

Mount:

Mount;

Fittings.

End

Mount).

in,

Type

sync

flO70,

20-314"

19"

58

lbs.

50

lbs,

Cable

Assembly,

Cable

xsaembly,

Frames,

out,

50fb0

wide,

with

N.

Type

cps,

wide,

,

shipping

,

shipping

qype

BNC

handles

BNC.

380

12-314''
10-112"

weight

weight

N

to

for

watts

maximum.

high,

14-31

high,

14-314"

approximately

approximately

Male

to

Type

BNC.

bench

use,

16"

N

(for

deep.

deep.

76

73

Male

21ZAR

lbs.

lba.

TABLE

OF

CONTENTS

Page

No.

Section

Section

Section

I

GENERAL

1-1 General 1-1

1-2

LI

OPERATING

1l1

CIRCUIT

DESCRIPTION

............................

Accessory

Inspection
Controls and Terminals

Automatic

Operation

Waveahape

Po~itive

Operation

Operation

DESCRIPTION

General

Rep.RateMV

Delay

Purse

Pulae

Pulse
Pulse

Clipper

Output

Powersupply

Cablem

INSTRUCTIONS

.......................

...........................

Overload

...........................

of

and

Negative

of

Pulse

of

Pulae

Output

Relay

Pulse

Length
Position

................

.............

MV

and

Poeitlon

Forming

Length

Terminating

Amplifier

Blocking

MV

Circuits

MV

and

Thyratron

and

Thyrntron Vl6

............

....a.rn.....

.............

....................

Protection

..............

...................

Pulsa

Output

and

Control

Oscillator

Blocking

Vb

Blocking

Pulse

Levels

Rate

............

Controla

...............

....

Oacillatos

......

O~cillator

.

........

....

1-1

2-1

2-1

2-2

2-2

2-3

2-4

2-4

2-5

Section

SectionV

IV

MAINTENANCE

4-1

4-2

4-3
4-4

4-5

4-6

TABLEOFREPLACEABLEPARTS

OutputPulseAnalyels

Adjuetmenta

Servicing

Thyratron

Replacement

TroubleShaotingChart

..........................

Negative

Replacement

of

......................

High

Voltage

Supply

(V4.

V1Z.

V14.

etc

.....................

Load

Remistor

R7.1

and

R22

.

. .

....................

..................

. ) ....

4

4-1

4-3

2-5

4-5

4-6

4-7

5-1

SECTION

I

1-1

GENERAL

The

Model

ment

change.

The

decay

negative

the

and

able

This

counting
filters

generators,

ACCESSORY

AC-16K:

88/U

for

determining

pulse

repetition

output

from

instrument

produced

with a flat

pulses

attenuator

. 07

circuits,

and

band

RG-58

Type

2

12A

rate,

to

CABLES

BNC

GENEML

Pulse

top

are

10

is

pass

/U

male

Generator

the

by

this

and

available

connected

setting.

microseconds.

applicable

television

circuits

50

ohm

connector.

action

instrument

minimum

and

load,

The

to

systems,

and

coaxial

DESCRIPTION

is

a

fundamental

of

circuits

of

overshoot.

the

pulse

sync

pulse

the

testing

pulse

cable

Overall

under

has

a

shape

condition,

length

of

response

modulation

terminated

length

short

is

radar

of

4Bt1.

measuring

conditions

time

Either

is

continuously

video

of

positive

independent

supply

systems,

amplifiers,

of

UHF

each

end

instru-

of

rapid

rise

-and

of

voltages,

vari

nuclear

signal

with

or

-

UG

-

AC-16B:

UG-88/U

on

the

other

AC-

16D:

U

Type

AC-16C:

2

1B

tor

AC-

UG-21B/U

/U

at

other

E6F:

BNG

Type

RG-58

Type

RG-58/U

BNC

end.

male

/U

Overall

connector.

RG-9A/U

N

male

end.

Overall

RG-9A/U

Type N male

50

ohm

coaxial

male

coaxial

50

connector

50

connector

length

cable

ohm

coaxial

length

ohm

coaxial

connectors.

cable

and

45".

terminated

Overall

cable

and

UG

72".

cable

terminated

dual

banana

one

length

terminated

-23B

Overall

/U

terminated

on

one

plug

(3

end

only

with

4411.

one

end

Type N female

on

each

length

72".

end

with

/4"

center)

WG-881

with

connec

end

with

UG-

-

S

EC

TION

11

2-2

Refer

CONTROLS

PULSE

This

front

SYNC
This

This

ather

+r

This

trols

terminal.

SYNC

The

the

to

terminal

panel.

OUT

terminal
terminal

device

-

toggle

the

IN

SYNC

panel.

the

OUT

polarity

generating

Warranty

AND

is

a

It

is

is

a

provides

for

use

switch,

IN

terminal

A

voltage

circuit.

OPERATING

sheet

TERMINALS

Type

the

output

BNG

a

with

on

the

of

the

is4a

can

in

N

jack

connection

terminal

voltage

the

panel

synchronizing

BNC

be

fed

INSTRUCTIONS

this

manual,

located

on

to

Pulse

above the

connector

into

at

for

the

synchronize

Generator.

voltage

this

the

the

lower

SYNC

on

terminal

lower

main

right

an

OUT

fed

the

right

pulse.

side

of

osciLloscope

terminal,

to

the

SYNC

lower

to

left

trigger

corner

the

side

the

of

panel.

or

con-

OUT

of

pulse

the

SYNC

The

pulse

chronization

sync

PULSE

The

PUlSE

poaition

loscope

PULSE

The

panel,

per

SELECTOR

SELECTOR

SYNC

rates,

pulses.

POSITION

PULSE

OUTPUT

the

has

RATE

PULSE

adjusts

second

SELECTOR

and

also

from

either

POSITION

and

the

main

been

RATE

in

switch.

pulse

synchronized

control,

the

repetition

conjunction with

knob

selects

control

selects

positive

SYNC

on

an

located

rates

two

ranges

necessary

or

negative

adjusts

the

OUTPUT

oscilloscope

with

the

SYNC

on

the

of

the

the

X1

and

circuitry

externally

timing

pulse.

screen

OUT

upper

pulse

X10

from

position

of internally

for

external

generated

between

Its

main

when

left

pulse.

hand

50

of

the

to

the

generated

syn-

the

MAIN

use

is

to

oscil-

side

of

the

5000

cycles

SYNC

PULSE

The

and

WIDTH

PULSE

controls

WIDTH

the

AMPLITUDE

The

AMPLITUDE

PUT

pulse.

ATTENUATION

The

ATTENUATION

provides

of

pulse

attenuation

output can

POLARITY

The

POLARITY'control

the

polarity

FUSE

The

fuseholder,

4

ampere

power

replaced

transformer

of

cartridge

by

unscrewing

width

the

on

control

of

control

control,

of

the

be

obtained.

MAIN

the

panel

fuse.

is

connected

is

the

the

MAIN OUTPUT

gives

located

Main

at

the

lower

OUTPUT

next

A

2

ampere

the

fuseholder

large

a

continuous

an

pulse

right

pulse

to

the

for

230V

dial

the

in

10

hand

from

POWER

fuse

should

operation.

cap

and

at

the

center

pulse.

variation af

right

db

hand

steps

side

positive

ON

be

inserting

so

of

switch,

used

The

of

the

side

that

the

panel

to

negative.

fuse

a

new

the

panel

MAIN

of

the panel,

low

levels

switches

contains

when

the

may
fuse.

OUT-

a

be

2-3

AUTOMATIC

An

overload

thyratron

Operation

when

sufficient

sition

then

The

1.

place

Model

Plug

line

when

Allow

2.

if,

the

instrument

warm-up

without

the

and

the

of

the

21ZA

several

SELECTOR

unit

can

3.

allow

Connect

This

about

connection

OVERLOAD

relay

for

the

any

relay

any

external

is

incorporated

reason,

is

is

and

instrument

Pulse

power

turn

swftch

in

be

used

ten

the

equipment

on

Generator

cable

the

is

minutes

the

t

after

minutes

should

RELAY

continuous plate

indicated

first

turned

turning

the

triggering

in

normal

into

a

nominal

toggle

on.

or - position

switch.

)

for

the instrument

2

or

3

warm

to

be

be

made,

PROTECTION

in

the

instrument

by a buzzing

on,

it

may

SYNC

operating

is

operated

SELECTOR

for

two

115V,

(The

and

with

minutes

up

driven

of

warm

time

if

if

to

the

possible,

current

sound,

indicate

or

three

condition.

as

follows:

50

to

pilot

possible.

to

warm

no

lamp

sync

up,

PULSE

through

to

protect

conduction

If

this

that

there

to

the

+

minutes

60

cycles
should light

up

with

in,

Although the

it

is

desirable

OUT

terminal.

a

nominal

the

@

occurs.

occurs

is

in-

or

-

po-

should

power

the

SYNC

45~

to

50

ohm

The

proximately

50

If

the

of

20

ated

from

true

set

OUTPUT

ing

The

SYNC

minals

be

switched to

should

dial

then

control

on

by

to

be

set

be

the

oscilloscope

means

give

cable.

output circuit

50

ohms

for

in

on

to

set

is

the

is

not

overall

to

30

megacycles,

in

a

non-inductive

the

load

when

the

full

output.

source

an

imperfect

OUT

an

set

the

then

of

terminal

oscilloscope

select

to

either

desired

to

select

adjusted

the

AMPLITUDE

desired

of

the

Model

ohms

absolutely

system

which

se

termination

necessary

is

sensitive

the

50

ohm

may

cause

ATTENUATION

Under

impedence

output

may

the

best

the

repetition

the

pulse

until

screen.

these

cable

be

and

the

performance.

XI

or

width

the

The

CONTROL

output

level.

212A

is

of

fox

to

frequencies

output

is

connected

cable

load

to

ringing.

and

OUTPUT

conditions

less

than

termination

polarity

the

X10

position,

rate,

The

desired

pulse

amplitude

appears

arrd

terminated

the

output

many

should

prevent

This

controls

the

50

ohms

at

to

the

synchronizing

of

the

SY

The

SYNC

PULSE

and

the

at

of

the

the

OUTPUT

with

ap-

cable

measurements.

on

be

reflections

is

especially

Model

thus

the

NC

with

the

order

termin--

are

Z12A

result-

source

OUT

SELECTOR

and

the

PULSE

WIDTH

PULSE

the

desired

pulse

dial

POSITION

can

be

ATTENUATOR

end,

ter

signal

may

position

adjusted

-

may

RATE

2-5

Do

than

5000

seconds

2500

must

creased

position

WAVESHAPE

The

output

and,

in

operating

erator

the

generator

the

internal

condition

attenuation

pulse

general,

conditions

is

operated

impedance

may

is

not

set

the

50

micreseconds

cps

is

used.

may

be

cps,

be

OF

and

be

increased,

Above

decreased

so

as

circuit.

OUTPUT

from

the

the

waveshape

of

the

at

zero

an

unterminated

of

corrected

CAUTION

PULSE

Maximum

used

2500

as

not

to

overload

PULSE

Model

Pulse

attenuation,

the

generator

by

properly

the

internal

POSITION

when

for

cps

the

2

is

Generator.

a

repetition

the

repetition

1

ZA

has

quite

with

load,

impedance

delay

repetition

delay

maximum

the

tubes

extremely

independent

of

1015

rates

rate

to

greater

rate

micro-

up

delay

is

in

the

of

However,

a

length

reflections

being

terminating the

less

of

may

than

approaches

I

of

to

in-

pulse

good

wave

the

when

cable between

occur

50

ohms.

cable,

load

50

shape

and

the

due

As

ohms,

the

gen-

to

This

the

The

waveshape

bout

50

control,

is

desired,

and

operate

as

possible.

The

AMPLITUDE

the

circuit,

put

terminals

of

the

AMPLITUDE

put.

to

imum

Unless

operate

position.

volts

the

is

of

waveshape

it

is

the

there

into

this

the

unit

little deterioration

best

output.

preferable

with the

As

the amplitude

deteriorates

to reduce the

AMPLITUDE

control

will

a

50

control

additional

with

In

some

with

is

be

at

ohm

will

output

the

AMPLITUDE

cases

the

AMPLITUDE

AMPLITUDE

slightly

control

not

calibrated, but,

least

load.

give

the

as

50

volts

On

appreciably

is

absolutely

pulse

control

is

reduced

and,

output

close to the

peak

most

units,

control

output

control

set

to

provide

with

the

AMPLITUDE

if

the

best

waveshape

level

available

necessary, it

with

the

50

volts

with

no

attenuation

from

the

maximum

more

than

SO

slightly below

attenuator

position

the

position

volts out-

is

desirable

the

waveshape will show

at

full

maximum.

a-

in

out-

max-

a

2-6

2-7

POSITIVE

The

positive

equal

panel.

same

plitude

OPERATION

The

pulse

10

microseconds.

is

convenient

tures

adjustable

between

output

With

a

can

this excellent flexibility

little

be

pulse

tained

it

is

desirable

the

pulse

tion

in

AND

and

and

either

These

value

and

between

OF

length

for

of

this

instrument.

pulses involves

two

larger

pulse duration,

sacrifice

expected

lengths

from

where

time

length to

the

pulse

drogen thyratron

the

equipment,

there

age

behind

may

over

the

be

a

period

main

some

NEGATIVE

negative

can

be

outputs,

it

is

normal

the

positive

PULSE

is

adjustable

This

a

great

time

in

absolute

to

be

correct

considerably

to

time.

to

use

some

the

length

tubes

some

change

change

of

time.

pulse

PUUE

pulse

selected

however,

that

and

LENGTH

from

continuously

many

applications

The

generation

a

differential operation whereby

periods

in

accuracy.

within

Where

sort

correct

is

used

the

in

in

in

value.

variation

the equipment,

pulse

the

Controls

dial

so

that

OUTPUT

outputs

by

cannot

there

negative

AND

are

means

be

will

PULSE

less

adjustable

is

used

to

the control

In

f

10

percent

more

accurate

of

pulse

the

variation

an

auxiliary

One

in

length

length calibration

are

pulse

LEVELS

adjusted

of

the switch

expected

be

output

than

.

and

of

these very

control

of

general

a

position.

RATE

07

the

to

to

little

of

a

feature

is

one

the

pulse

the

except

in

the

be

have

difference

CONTROLS

microsecond

of

short,

actual

output,

pulse

for

length

pulse lengths

calibrating

of

the

main

causes

the characteristics

As

tubes

will

be

obtained,

provided

length

on

the chassis

calibration

approximately

on

the

front

exactly

in

in

the

Model

the

useful

continuously

the

diff

time

there

length

very

short

may

are

necessary,

means

of

varia-

of

the

are

changed

and

as

the

tubes

just

can

the

am-

to

2

fea-

esence

of

the

control

be

to

set

hy;

in

also

be

reset

1

is

ob-

ZA

from

the

The

except

sate

The

the

in

it

The

5

it

use

ing

time

adjustment

length

is

internal

range

general,

is

preferable

Model

volt

amplitude

is

desired

a

wave

voltage.

Square

for

a

sine

It

is

important

of

5000

by

the

duty

petition

have

a

to

of

that

the

changed

repetition

from

hold

2L2A

to

shaper

Wave

wave

cycles

cycle

rate

at

time-of

time

of

the

pulse

if

necessary.

these

main

pulse

length

especially

50 to 5000

within

to

use

an

can

be

and a rise

synchronize

of

some

The

unit

synchronizes

Generator.

input

that

/sec.

the

-rise

is

the

Performance

of

the

low

in

the

See

controls.

is

essentially

will

tend

above

rate

cycles

f

2

570,

external

repetition

generator

/set.

but

when

oscillator

synchronized

time

in

the

from a sine

sort

to

increase

very

Another

show

Model

in

Figure

212A

typical

not

at

thyratrons,

frequency

order

end

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a

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Schematic

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Diagram

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SECTION

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212A

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the

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DESCRIPTION

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Figure

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the

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the

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pulse.

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amplifier 107a,

condition

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and

14

appears

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The

of

is

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appear

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trouble

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leading

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increase

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tube

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pulse

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characteristic,

item

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trig-

the

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with

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rates.

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thyratrons

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to

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V105.

duty

cycle

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minimum

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Microphonic s usually

ultivibrator tubes

When

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tubes

the

required

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for

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than

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the

.

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pulse

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for

or

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visual indication

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Zn

was

tained

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the

2

ADJUSTMENTS

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e

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very

at

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instrument

line

Length Calibration

to

the

position

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mately

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Following

The

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calibration

sary,

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the

Through

when

to

the

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the leading

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filter

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filter

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instruments

sensitivity oscilloscope.

of

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known

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may

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Power

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to

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the

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the

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the

manual

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length

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multivibrator

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the

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the

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primary

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power

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the

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microseconds.

pulse

PULSE

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C128

to

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to

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calibrated

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pulse length

oscilloscope, set

of

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5.

6.

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the

curacy.

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the

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position

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to

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petition

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the

R124

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high

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the

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maxirriurn

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rate

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Tighten

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set

points

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the

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the

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UTE

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dial

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position

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5000

rate

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2

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the

dial

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on

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the

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and

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max.

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delay

on

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105.

on

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adjusted

eter.

made

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as

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varying

service

the

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grid

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The

bias

the

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of

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output

the

amplifier

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voltage

tube

three

of

the

regulator

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checks

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4-3

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1.

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3.

4.

5.

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circuit

pulse

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tuate

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SERVICING

voltage

voltage

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adjust

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maximum

output

60

volt

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milliarnmeter

rate

dial

current

50

ma

R28

through

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relay

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cathode

R33

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the

center

instrument

terminal.

pulse

pulse

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at

max.

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and

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tension

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VOLTAGE

terminal

not

amplitude.

required

RZ8.

relay

sync

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reset

pulse

(pin

6)

300

volts.

pulsing,

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calibration.

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of

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and

of

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life

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of

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to

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relay

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to

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Following

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voltage

voltage

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105

of

125

THYRATRON

V6

and

V16

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tron suspected
observed

ample,

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on

on

the

trouble

However,

tube

change,

symptoms

if

jitter

the

leading

leading

is

clearly

if

of

parts

the

voltage

of

105

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to

obtain

volts

volts.

and

not

not

REPLACEMENT

tube positions.

of

edge

the

the

being

39

observed

edge,

a

jitter

trouble

faulty

change

exchange

and

not

result

remains

is

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regulator

125

volts.

less

more

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as

the tubes

on

the

on

the

of

the

on

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than

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than

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trailing

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trailing

in

negative

tube

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high

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milli-amperes

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edge

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16

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the

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spite

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voltage

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value

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see

For

before,

position,

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measured

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line

if

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but

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type
Model

ment,

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will

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WP45B.

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aging

will

that

successfully

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and

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percentage

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selection

the replacement tube

manufactured

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in

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thyratron

following

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instrument,

should

is

used

paragraphs).

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not

be

required.

should

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for

be

use

in

replace-

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replacements

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type

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the

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Release

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tighten

tube.

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switch

when

to

turned

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Turn

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ten

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lay

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6.

trol

obtained without
hour

instrument

minutes.

the

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or

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proceed

screen

tube

clamp

cover

to

the

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clamp.

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or

on.

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chatter

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to

replace

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cover

Set

on

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and

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instrument.

+.

position

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to

rate

chatter.

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allow

tubes.

a

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the

back

suspected

tube,

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change

Set

ea

the

instrument

control

10

microseconds.

to

switch

one

minute

decrease

and

minimum

heat

to

This

to

the

in

the

of

the

instrument.

thyratron.

place

plate

the

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minimum

for

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position.

and

stop.

PULSE

pulse

process

Model

tube

shield

212A

in

to

SELECTOR

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and

the

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length

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take

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socket

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pulse

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re-

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are

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Allow

7.

length

pulse,

slow

four

hours.

hours

and

the

try

another

5

REPLACEMENT

The

resistors

ent

types.

must

it
film

ation

schematic

be

types.

rating.and

instrument

for

approximately

If

pulse

rise

or

Again

of

operation,

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used

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replacement

is

decay

OF

LOAD

for

to

is

non-inductive

The

resistor

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diagram.

run

at

maximum

twenty

unsatisfactory

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observe

the

known

allow

pulse.

output

to be

thyratron.

pulse

RESISTOR

R21

and

R22

resistor

such

be

as

must

within

the

have

5%

rate

and

-four

to

may

need

hours.

due

to

excessive

run

an

additional

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after

is

still

the cause

R21

AND

be

any

not

be

unsatisfactory

of

R22

of

identical,

deposited-carbon

not

less

than

of

the

value

shown

minimum

Observe

jitter

twenty-

seventy-two

the

trouble,

several

however,

or

metalized-

a

5

watt

on

the

output

or

differ-

dissap-

Parallel

successfully,

as

short

combinations

as

however,

possible.

of

lower

lead

wattage

and

component

resistors

length

may

should

be

used

be

kept

4-6

When

placement

lel

Replacement

to

R21

the

is

replaced

should

side

of

resistoYs
Hewlett-Packard
be

accompanied

TROUBLE

The

following

toms.

expected

note

giving

replacement

the

component

cautions,

a

tube

for

checking

same

socket,

SHOOTING

The

solutions

probability.

cautions

of

Dial

change

and

trouble

may

within a multivibrator

by

a

be

mounted

the instrument.

for

Company.

by

serial

number

CHART

shooting

for

each

Each

and

checks

a

component.

be

replaced

calibrations

is

not

found

single,

so

its

RZI

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When

suggested

possible,

of

chart

symptom

that

When

without

will

usually

faulty,

cylindrical

axis

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horizontal

R22

may

be

parts

instrument

is a list

are

listed

remedy

should

no

be

caution

other

be

inaccurate

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resistor,

procured

order

to

be

of

observed

in

is

followed

made

or

than

If

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following

check

normal

a

tube

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the

and

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should

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symp-

order

of

by

is

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pre

following

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removed

to

re-

a

-

the

TROUBLE

SHOOTING

CHART

FOR

MODEL

2

IZA

PULSE

GENERATOR

-

1,

RELAY

2.

JITTER

EDGE

SYMPTOM

ONLY

PUT

PWLSE

CHATTER

ON

LEADING

OF

OUT-

DEFECTIVE

COMPONENT

V6

V

104

V105

V

106

SHORTED

IN

PULSE

V6

V104

CR104)

)

CAPACITOR

LINE

SUGGESTIONS

Replace

PULSE

Replace

ti

on.

Replace

Replace

Replace

pulse length.

Replace

LENGTH

Not

Vb

LENGTH

V104.

V105.

VlOb.

defective

V6.

likely

calibration.

to

-

CAUTIONS

or

interchange

calibration

Check

Check

capacitor.

Check

occur.

rise

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and

PULSE

maximum

time

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CHECKS

and

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pulse

RATE

pulse

Check

and

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shape.

calibra-

delay.

maximum

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r=

3,

SLOW

#

4.

NO

PULSE

(SYNC

AVAILABLE)

RISE

OUT

TIME

PULSE

Vb

V6

Replace

LENGTH

Replace

Check

pulse

V6.

V.6

Check

calibration.

or

exchange

shape

rise

and

time

V6

and

length.

and

V16

PULSE

for

trial.

I

V1

Replace

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C135,

V

1

v2

V6

RELAY

C138

Replace

'ZeroJ

Replace

V3

may

of

leading

V9

may

hump

C31

may

various

Replace

Replace

Check

Clean

VL05,

position

def

ec

effect

edge.

effect

on

tap

be

forms

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V2.

V6.

contacts

Check

of

control.

Live

capacito~

the

very

the

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following

as

high

of

overshoot.

on

relay

maximum

small

to

1

leading

as

30

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delay

in

delay

spike

microsecond

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pCLf

to

reduce

line.

on

and

top

22

L3

V

104

Replace
Replace

Check

running

L2.

L3.

pulse

at

)

)

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likely

calibration,

high

rate.

to

occur

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be

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TROUBLE

r

SYMPTOM

7.

UNCLSPPED

HIGH

PEAKS

PULSE,

AMPLITUDE

DEFECTIVE

COMPONENT

R30

V7

V9

SHOOTING CHART

SUGGESTIONS

R30

ing
defective

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burns

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an

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open

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or

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if

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or

output

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and

V9

pulse.

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shorts,

resnlt-

Replace

-

ETC,

i

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8.

HUMPED

PULSE

OUTPUT

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u

9.

ENLARGED

OF

TOP

rL

TOP

RATED

TRACE

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OF

V7

V17

V15

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,

Replace

Replace

instruction

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have

Replace

per

Replace

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cause

this

V

instruction

VP1,

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Check

book.

of

high ripple

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15.

book.

flatness

regulated

from

regulated

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can

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11.

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Replace

line.

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value

level

varies

for

defective

of

R30

both

low

between

capacitor

to

give

and

50

and

in

optimum

high

rates.

100

ohms.

pulse

pulse

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delay

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V

17

V15

R5

1

12.

VARZATlON

AMPLITUDE

CHANGE

LENGTH

-

IN

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OF

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RATE

OR

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ReplaceV11)

Replace

Replace

pulse

Replace

pulse

Adjust

amplitude

I

C5

)

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17.

amplitude.

V

15.

amplitude.

value

variation

occurswith

old

components

Check

Check

of

R51

maximum

maximum

to

with

give

changes

positive

positive

minimum

in

rate.

SYMPTOM

13,

JITTER

EDGEONLYOUTPUT

PULSES

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COMPONENT

Vlb

V

108

SUGGESTIONS

Replace

pulse

Replace

calibration.

V16,

and

V

PULSE

108.

-

CAUTIONS

Check

leading

LENGTH

Check

calibration.

PULSE

-

CHECKS

edge

of

LENGTH

-

output

ETC.

14.

15.

SLOW

A-1

JITTER

EDGES

PULSE

DECAY

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-------

ON

BOTH

OF

OUTPUT

TIME

V8

CR105

CR106

I

V16

V8

V

101

V105

Replace

pulse.

Replace

Only

may

as

last

require

LENGTH

Replace

pulse

Replace

pulse

Replace

pulse

Replace-

pulse

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and

advance

delay

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dial.

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and

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and

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1.

and

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trailing

change

check

LENGTH

check

LENGTH

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micr

Check

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this

of

another

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trailing

zero

ophonic

zero

edge

of

output

crystal

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ledge

calibration.

edge

calibration.

and

s

and

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of

maximum

.

maximum

as

it

output

output

..I

-

.Io4

V

C

106

103

Replace

calibration.

Replace

Coupling

nected

position

V

V106.

in

may

104.

capacitor

two

Check

different

be

used.

PULSE

C

I39

(C

positions.

(See

RATE

103)

may

schematic

be

Either

diagramsl

con-

The

best

the

one

coupling

50

wp,£d.

C

PO3

must

position

which

is

used,

If

plate

be

for

gives

C

to

30

pCLfd.

a

particular

least

103

must

cathode

jitter.

be

coupling

instrument

If

plate

approximately

is

used,

to

is

plate

16.

NO

LENGTH

PULSE

10.5

TO

e

17,

DRIFT

LENGTH

CHANGE

RATE

CONTROL,

ROLLS

11

OF

FOLLOWING

IN

OFF

hsecs.

PULSE

PULSE

AT

CR

102

CR103

Vlb

V8

V

108

V

109

V

107

V6

Vlb

Vl08

Replace

Replace
Replace

pulse

Replace

pulse.

Replace

calrbr

Replace

Replace

Replace

LENGTH

Replace
pulse

Replace

calibration.

CR102.

CR103.

V16.

and

PULSE

V8.

V108,

ation.

V109.

V

107.

V6.

calibration.

V16.

and

PULSE LENGTH

V108.

Check

Check

LENGTH

Check

Check

Check

Check

Check

maximum

trailing

trailing

PULSE

rise

time

trailing

PULSE

pulse

edge

calibration.

edge

edge

calibration.

of

of

output

LENGTH

and

PULSE

of

LENGTH

delay.

output

output

V

109

V8

V107

CRlO6

GR105

Replace

Replace

pulse.

Replace

calibration,

Only

may

LENGTH

Replace

V109.
V8.

V107.

as

last

require

CR105,

Check

resort

calibration

dial.

trailing

Check

replace

PULSE

this

of

a

edge

of

LENGTH

crystal

new

PULSE

output

as

it

SYMPTOM

DEFECTIVE

(

COMPONENT

SUGGESTIONS

-

CAUTIONS

-

CHECKS

-

ETC.

18.

NO

PULSE

TRIGGER

VISIBLE

PULSE

THAT

PULSE

HIGHER

OF

VISIBLE

PULSE

THAN

POSITIVE

-

V11

or

power

R22

In

instruments

two

parallel

resistors

value

of

source

resistance

for

for

100

R22,

VE

having

ohm

check

1

Replace

Replace

Check

supply

I

Replace

Replace

Replace

Replace

Replace

advance

Replace

Check

replacement,

maximum

V

11.

defective

voltage

R2

1.

R22.

defective

V102.

V101.

and

microphonics.

CR101.

winding

Check

output

Check

continuity

check

maximum

component

pulse

per

resistor.

Check

SYNC

in

amplitude

instruction

zero

and

SYNC

of

T

10

OUT

pulse

power

and

maximum

OUT

pulse.

Following

1.

pulse

amplitude.

supply.

regulated

manual.

shape.

2

1.

INSUFFICIENT

ADVANCE

PULSE

SlOl

cuitry,

cables,

switch

cir-

shielded

etc.

Check

points

Replace

obtainable,

POSITION

continuity

in

sync

V

10 1.

control

and

output

Check

position

resistance

circuit,

maximum

of

0

advance

and

rnicrophonics.

to

ground

advance

on

PULSE

at

22.

INSUFFICIENT

DELAY

23.

LNSUFFLCIENT

AMPLITUDE

24.

HUMP

FOLLOWING

TACHED

PULSE

E

25.

HUMP
FOLLOWING

TACHED

PULSE

ON

BASELINE

TO

ON

BASELINE

FROM

PULSE

PULSE

AND

OUTPUT

AND

AT-

DE-

OUTPUT

V105

R

3

5

V11

V6

Replace

position

control

With

adjust

Replace

I

Replace

pulse

V105.

of

and

Check

'0'

delay

micsophenics.

AMPLITUDE

R35

ta

give

VlT.

Vb.

and

Check

PULSE

maximum

on

PULSE

control

60

volt

leading

LENGTH

POSITION

set

to

output

calibration.

pulse.

edge

pulse

maximum,

of

delay,

output

s

26,

INACCURATE

CALIBRATION

27.

RINGING

FOLLOWING

MENT

T103

RATE

ON

BASELINE,

REPLACE-

OF

TRANSFORMER

R125

T

103

Tolerances

are

wide.

determine

Install

with

I

I

220

grid

of

high

The

potentiometer

calibration

ohm,

of

V

1/2

16.

resistance

accuracy.

watt

potentiometers

selected

resister

in

will

series

WAVEFORM

The

thxoughout

provide

tiation

pected,

scope

instruments

not

identical

formers.

the

a

very

to

pulse

particularly

sweep

The

triggering

V105

to

with

comes

and

trailing

the

devices,

V108

edge)

trigger

the

trigger

DATA

following

circuits.

nearly

completion.

speed

following

with,

the

leading

are

is

pulse

pulse

waveforms

The

complete

with

used.

degree

The

serial

waveshapes

or

trailing

not

the

bodies.

'one

shot'

the

time

from

lapse

the

for

points

picture

Small

newer

1439

edges

types

preceding

the

fallowing

may

be

observed

selected

of

variations

of

overshoot,

type

develop

produced

of

the

Pulse

whose

desired.

circuit.

are

signal

in

and

pulse

waves

tsansformexs

hapes

by

the

observed

timing

pulse

length

A

leading

circuit.

at

various

those

process

pulse

most

from

shape

depending

similar

earlier

pulses

multivibrator

(time

edge

The

trailing

points

useful

pulse

may

be

on

oscillo-

used

to,

pulse

are

trans-

the

s,

V

from

is

simultaneous

edge

and

ini-

ex-

in

but

actual

10

1,

leading

be-

3.

POINT

OF

MEASUREMENT

Pin

6

of

VlOlb

APPROX.

VOLTAGE

CL

SEC.

LENGTH

WAVEFORM

5.

Pin

7

of

VlOZb

POINT

MEASUREMENT

6.

Pin

6

7.

SYNC

8.

C118,

9.

Pin

1

of

VlOZb

OUT

output

of

V105a

OF

(positive)

side

APPROX.

VOLTAGE

16ZV-

58V+

121V-

p

SEC.

LENGTH

WAVEFORM

10.

12.

13.

14.

Pin

6

of

Pin 7 of

Pin

6

of

Pin

2

of

V105b

VLO6b

VlO6b

V107b

POINT

MEASUREMENT

OF

APPROX,

VOLTAGE

CL

SEC.

LENGTH

WAVEFORM

15.

16.

17.

19.

Delay

Delay

Platecapof

Bin

line,

line,

7 of

VlOa

input

output

V6

420V+

480Vt

-900

-1500

280Vt

1

volts

oov

to

-

total

.

10

0

--i

20.

21.

22.

23.

Pin

Pin

Pin

2

Pin

7

6

6

of

V107a

of

V107a

of

V108a

of

V108b

POlNT

MEASUREMENT

OF

APPROX.

VOLTAGE

u

SEC.

LENGTH

WAVEFORM

24.

25.

26.

27.

28.

Pin

Fin

Pin

Plate

Pins

and

2

1

7

1,

6

of

VlO9a

of

V109a

of

V109a

cap

2,

of

V8

of

66Vt

VZ6

5

29.

30.

Pin

Pins

V

1

1

aulse

LofV11

3

and

6

lpositive

output)

of

CIO

C26

Fig.

4-1

Pulse Generator, Typical Top View, Cover Removed

Fig.

4-2

Pulse

Generator, Typical Bottom View,

Pulse

Timing Section

Fig.

4-3

Pulse Generator, Typical Front View of Power Supply

and Pulse Generating Sections (Removed)

Fig. 4-4 Pulse Generator, Typical Rear View

and Pulse Generating Sections (Removed)

of

Power Supply

R

71.16

61

R

53

96.25

INPUT

FROM

C13

Fig-

4-5

-1

OUTPUT

VIEWED

\-+TO

1,

-

ATTENUATOR

FROM

ATTENUATION

REAR

OF

-

000.

DETAl

SWITCH

L

WLSE

OUT

TERMINAL

POWER

THE

ON

l

NTEHNAL

POWER

INSTRUMENTS

CINE

LINE

ELECTROSTATIC

FILTER

FILTER

WHERE

1S

NOT

TI

AND

SHIELDS.

DETAIL

REQUIRED

T2

CONTAIN

I

'

GROUND

4K

-3QOY

SOOK

500K

+300V

SOOK

Fig.

4-7

Typical

Resistor

Board

Details

RB4

1

Fig,

4-8

Typical

Resistor

Board

Details

TO

PLATE

OF

V6

Pulse

Forming

RB5

Line

Fig.

4-9

Typical

Delay

Line

RB

6

Resistor

4-28

Board

Details

ALL

ms

WES:

COWDITIONS OF DC VOLTAGE MEASUREMENT

APPCY

I.

I15 l230

VOCIJ

t.

YIWREMENT

A VU.TMETER OF 122 MEWMS INPUT RESISTANCE

3.

SET

THE CONTRU AS FOLLOWS:

SYNC. SELECTOR

-1

FiJLSE

WSlTlON AT MAXIMUM UOCKWSE POSTION

1-1

(-1

-1

[-1

NO

CONNEmOWt TO INW

I

m

FRONT a REAR

.

50-50 CYCLE POWER SUPPLY.

TAKEN

(LETWEEN

AT

XI0

AT 1000

PPS

AT I0

jl

SEC

AT 0

AT

MAXIMUM mcKmsE PoslnoN

AT

+

AT

+

MI

THE

OUTPUT TERMINUS

MU(

INDIUTEO

DIAGRAMS

FONTS

AND

CHASSIS

wlm

I

C 127

27

DELAY LINE

-

-

-u

@Model

212A

Front Deck

Q~odel212A

Rear

Deck

TABLE OF REPLACEABLE PARTS

NOTE

Readily available standard-components have been used

in this instrument, whenever possible. However, special

SECTION

V

components may be obtained from your local
Packard representative or from the factory.

When ordering parts always include:

1.

@

Stock Number.

2.

Complete description of part including cir-

cuit reference.

3.

Model number and serial number of in­strument.

4.

If part
tion, function, and location of part.

If there are any corrections for the Table of Replaceable
Parts they will be listed on an Instruction Manual Change
sheet at the front of this manual.

is

not listed give complete descrip-

Hewlett-

TABLE

OF

REPLACEABLE PARTS

#

Total

quantity

used

in

the

instrument.

5-2

TABLE OF REPLACEABLE PARTS

CIRCUlT

REF.

C3 1

C32

C33 thru

C36
C37

C38, 39
C40 thru

ClOO
C 10 1

C 102

C103

DESCRIPTION, MFR.

Capacitor: fixed, mica,

pp.f, flO70, 500 vdcw V*

10

Electrical value adjusted at factory
Capacitor: fixed, paper dielectric,

.

047

p.f,

+lo%,

Capacitor: fixed, mica,

Capacitor: fixed, mica,

Same as C33

These circuit references not assigned

Capacitor: fixed, electrolytic,

Capacitor: fixed, mica,

This circuit reference not assigned

p.p.f,

500

750

~f,

10

680

+50/0, 2500 vdcw

p.p.f, 25% 2500 vdcw

+50%, 450 vdcw

~p.f, f lo%, 500 vdcw

*

&

MFR. DESIGNATION

600 vdcw CC*

Z*

Z*

X*

Z

*

@

STOCK
NO.

14-10

16-15

14-36

14-37

18-10

14-21

i

#

1

2

6

1

1

3

C104
C105

C 106
C 107
C108
C109

CllO
Clll
C112
C113
C114

C115

Cll6

Same as C21
Capacitor: fixed, mica,

220

pwf,

flO70,

This circuit reference not assigned
Same as C3
Same as C32

Capacitor: fixed, paper dielectric,

0.1

*f,

f 10% 600 vdcw CC*

Same as

Same as C3
Same as
Same as C9
Same as C7
Capacitor: fixed, silver mica,

Electrical value adjusted at factory
Capacitor: fixed, paper dielectric,

C102

C102

220

y

pf, f570, 500 vdcw

.022

bf,

+100/o, 600 vdcw CC*

500 vdcw V*

Z

*

14-66

16-1

15-32

16-12

3

1

1

1

C117

*

See

I'

List

#

Total quantity

Capacitor: fixed, mica,

82

p1j.f.

+lo%,

500 vdcw

V*

14-19

of Manufacturers Code Letters For Replaceable Parts

in

used

the instrument.

5-3

1

.

Tablew.

TABLE

OF

REPLACEABLE PARTS

#

Total

quantity

used

in

the

instrument.

5

-4

TABLE

OF

REPLACEABLE PARTS

TABLE

OF

REPLACEABLE PARTS

TABLE

OF

REPLACEABLE PARTS

#

Total

quantity

used

in

the

instrument.

5-7

TABLE

OF

REPLACEABLE PARTS

TABLE

OF

REPLACEABLE PARTS

#

Total

quantity

used

in

the

instrument.

5

-9

TABLE

OF

REPLACEABLE PARTS

TABLE OF REPLACEABLE PARTS

DESCRIPTION, MFR.

Same as R151 Electrical value adjusted at factory

Same as R40

Same as R87

*

&

MFR. DESIGNATION

($3

STOCK
NO.

REL 1

S 1
S 2
S

3

I

S4-5100

1

SlOl

Resistor: fixed, composition,

2700 ohms,

Electrical value adjusted at factory
Resistor: fixed, composition,

39,000 ohms,

This circuit reference not assigned

Resistor: fixed, composition

15,000 ohms,

Electrical value adjusted at
Relay: DPDT, 24v dc HF

Switch,

This circuit reference not assigned

Switch, rotary: Polarity

I

These circuit references not assigned

Switch, toggle: DPDT

toggle: SPST

+10qo, 1

+lo'%,

+lO$,

I

Sync Selector Switch Assembly: complete

Sync Selector Switch: less components

Transformer, power
Transformer, filament HP* I 910-75

I

T2

I

T3-TI00

I

TlOl

These circuit references not assigned

I

Transformer, pulse: 4 leads HP* 913-3

I

I

T102, 103 I Transformer, pulse: 6 leads

Tube, electron:
Tube, electron: 6L6GB
Tube, electron: 6W4GT
Tube, electron: OB2
This circuit reference not assigned

6x4

W

112 W

112

factory

W

'

-

hp-

B

*

B*

D*

W*

D*

HP*
HP*
HP)

HP*

I

I

I

I

1

310-54
212A- 19A

310-81
910-74

I

I

I

913-2

i

V 6
V7,8,9

V

1 OAB
v11
v12

I

*

#

List of Manufacturers Code Letters For Replaceable Parts Tablew

See
Total quantity used in the instrument.

Tube,
Tube, electron:
Tube, electron:
Tube, electron:
Tube, electron:

Tube, electron:

Same as V4

Tube, electron:

I

electron: HP45

6J6

12AX7
6AS7G
OD3

5U4GB
6AU6

I

.

TABLE

OF

REPLACEABLE PARTS

#

Total

quantity used in the instrument.

5-12

@

MANUAL CHANGES

ERRATA

R165:

:

Change

+100h,

-

MODEL

PULSE

to

resistor, fixed, composition, 15,000 ohms

)fi

W;

-hp-

Stock No.

212A

GENERATOR

23-15K,

Mfr.,

B