Philips Pm 5775 User manual

PHILIPS

MANUAL

PULSE

GENERATORS

1

Hz

—100MHz

PM

5775

-

PM

5776

9446

057

75..1

9446

057

76..1

9499

460

04711

1/1171

bbe

de

CONTENTS

sENERAL

I,

I.

IV.

Introduction

Technical

data

Accessories

Description

of

the

block

diagram

IIRECTIONS

FOR

USE

V.

VI.

Installation

A.

Setting

up

the

instrument

B.

Adjustment

to

the

local

mains

voltage

C.

Earthing

D.

Switching

on

E.

Fuses

F.

Controls,

input

and

output

connectors

Operation

A.

Familiarizing

with

the

instrument

B.

Brief

directions

for

different

operating

modes

SERVICE

DOCUMENTATION

VII.

Vill.

Circuit

description

A.

Timing

circuit

B.

Output

circuit

and

d.c.

offset

C.

Power

supply

Gaining

access

to

and

replacing

of

parts

A.

Removing

the

cabinet

B.

Removing

the

knobs

C.

Removing

lamp

LA1

in

the

POWER

ON

switch

D.

Removing

circuit

board

3

(output

circuit)

E.

Replacing

reed

relays

RE301

and

RE302

F.

Replacing

transistor

Z330

G.

Replacing

ceramic

chip

capacitors

IX.

Survey

of

adjusting

elements

and

test

instruments

required

19

20

27

34

37

87

43

46

a

47

48

49

50

51

52

X.

Checking

and

adjusting

A.

Power

supply

B.

Timing

circuit

C.

Output

circuit

and

d.c.

offset

XI.

Parts

lists

A.

Mechanical

B.

Electrical

XII.

Information

concerning

coupling

of

two

pulse

generators

PM

5775

and

accessories

required

XIII.

Fault

finding

procedure

54

59

64°

64

76

80

©)

N.V.

PHILIPS’

GLOEILAMPENFABRIEKEN

-

EINDHOVEN

-

THE

NETHERLANDS

-

1971

ST

OF

FIGURES

IV-1

IV-2

V-1

V-2

V-3

V-4

VI-1

VI-2

VI-3

VI4

VI-5

VI-6

VI-7

VIi-1

VH-2

VII-3

VII-4

VII-5

VII-6

VIH-1

VII-2

VIII-3

VIII-4

VIU-S

VIII-6

X-1

X-2

X-3

X-4

X-5

X-6

XI-1

XI-2

XI-3

XI-4

XI-5

XI-6

Waveforms

Block

diagram

Indication

of

controls,

input/output

sockets

at

the

front

of

PM

5776

Indication

of

controls,

input

sockets

at

the

rear

of

PM

5776

Indication

of

controls,

input/output

sockets

at

the

front

of

PM

5775

Indication

of

controls,

input

sockets

at

the

rear

of

PM

5775

PHILIPS

sampling

oscilloscope

PM

3400

Time

settings

at

single-pulse

operation

Set-up

monitoring

the

output

pulse

of

PM

5775

Set-up

monitoring

the

simultaneous

output

pulse

of

PM

5776

Interaction

of

positive-going

and

negative-going

pulses

at

normal

and

inverted

pulse

operation

Time

settings

at

double-pulse

operation

Time

settings

at

gated-pulse

operation

Simplified

diagram

of

the

pulse

delay

trigger

circuit

Simplified

diagram

of

the

pulse

delay

circuit

Simplified

diagram

of

the

pulse

width

trigger

circuit

Simplified

diagram

of

the

driver

and

output

stage

Simplified

diagram

of

the

driver

and

output

stage

with

fine

control

circuit

Simplified

diagram

of

the

current

source

for

the

positive

output

pulse

Tilting

assembly

Removing

the

knobs

Removing

the

transparent

cap

of

the

POWER

ON

switch

Removing

the

output

unit

(printed

wiring

board

PM

5775-3)

Removing

reed-relay

coils

L320,

L321

Applying

of

the

silicone

compound

Set-up

for

checking

the

gate

circuit

Set-up

for

checking

the

astable

multivibrator

Pulse

diagram

for

5

ns

delay

adjustment

Pulse

diagram

Pulse

diagram

Pulse

diagram

Location

of

components

(front)

Location

of

components

(rear)

Tilting

assembly

Location

of

components

(interieur)

Cropping

transistor

leads

Winding

data

for

L304

and

L317

XIL-1

XII-2

XII-3

XII-4

XII-5

XI-1

XIV-1

XIV-2

XIV-3

XIV-4

XIV-5

XIV-6

XIV-7

XIV-8.

XIV-9

XIV-10

Coupling

kit

Cover

kit

Tilting

assembly

Rack

mounting,

exploded

view

Coupling

of

two

modular

units,

exploded

view

Block

diagram

with

the

fault

finding

procedure

Circuit

board

power

supply,

component

side

Circuit

diagram

power

supply

Circuit

board

timing

circuit,

soldering

side

Circuit

board

timing

circuit,

component

side

Circuit

diagram

timing

circuit

Circuit

board

output

circuit,

soldering

side

Circuit

board

output

circuit,

component

side

Circuit

diagram

output

circuit

(version

—/01)

Circuit

diagram

output

circuit

(version

—/02)

Circuit

board

for

NORM.

INV.

switch

$8

(S10)

GENERAL

I.

INTRODUCTION

..

The

single

output

pulse

generator

PM

5775

and

the

dual

output

pulse

generator

PM

5776

provide

output

pulses

with

a

fixed

risetime

of

less

than

1

nanosecond

and

a

repetition

rate

of

1

Hz

...

100

MHz.

The

fast

risetime

and

the

extended

frequency

range

combined

with

other

features

like

double

pulse

generation,

gated

output

pulses

etc.

make

the

instruments

particularly

appropriate

as

a

test

signal

source

for

a

wide

variety

of

objects,

such

as

fast

logic

and

switching

circuits,

memory

circuits,

delay

lines

and

networks.

TECHNICAL

DATA

erties,

expressed

in

numerical

values

with

statement

of

tolerances

are

guaranteed

by

the

factory.

1erical

values

without

tolerances

are

intended

for

information

purposes

only

and

indicate

the

erties

of

an

average

instrument.

numerical

values

hold

good

for

nominal

mains

voltage.

{CTRICAL

Internal

triggering

Repetition

rate

Jitter

Temperature

coefficient

External

triggering

Triggering:

input

voltage

input

impedance

frequency

range

Gating:

input

voltage

Triggering

delay

Single-shot

operation

Pulse

width

Range

Duty

cycle

Jitter

Temperature

coefficient

Pulse

delay

Range

Jitter

Temperature

coefficient

1Hz...

100

MHz

Variable

in

9

ranges

with

continuous

control

within

the

ranges

Less

than

0.1

%

or

50

ps

whichever

is

greater

Less

than

0.1

%

per

°C

+

1.2

V

required

to

gate

the

generator

approx.

1

kQ

DC

...

50

MHz

+1.2V

From

TRIGG

IN

to

SYNC

OUT

approx.

12

ns

Single-shot

facility

by

means

of

push-.

button

5

ns...

100

ms

Variable

in

8

ranges

with

continuous

control

within

the

ranges

Approaching

100%

using

inverted-pulse

output

(limited

only

by

minimum

width)

greater

than

50%

in

normal

operation

Less

than

0.1°%o

or

50

ps

whichever

is

greater

0.1%

per

°C

5

ns...

100

ms

Variable

in

8

ranges

with

continuous

control

within

the

ranges

Less

than

0.1%o

or

50

ps

whichever

is

greater

0.1%

per

°C

Double

pulse

Sync.

output

Output

pulse

Source

impedance

Voltage

output

Attenuator

Rise

and

fall

time

Waveform

aberration

Polarity

Protection

Base

line

d.c.-offset

Output

connectors

Temperature

range

Mains

supply

Mains

voltage

Mains

frequency

Power

consumption

MECHANICAL

1

2.

Maximum

dimensions

(mm)

Weight

Double

pulse

mode

provides

twin’

pulses

at

set

delay

with

simultaneously

controlled

pulse

width

Square

wave,

amplitude

+

1.5

V

into

50Q

(+

5

V

open

circuit)

Pulse

occurs

approx.

30

ns

before

the

main

pulse

Both

outputs

of

the

PM

5776

are

identical

and

have

the

same

specification

as

the

PM

5775

output

502

300

mV

—

3

V

into

external

502

3Vand1V

Continuous

control

provides

overlap

between

land3

V

0.9

ns

+

0.2

ns

measured

at

+

or

—3

V

in

position

NORMAL

and

d.c.-offset

0

V

<

+

5%

of

max.

amplitude

at

d.c.-offset

0

V

Positive

or

negative

Normal

or

inverted

Against

short

and

open

circuit

£1.5

V

into

50Q

Continuously

variable

BNC

0...

40

°C

100

...

130

V

and

200...

260

V

switchable

50

-

400

Hz

PM

5775:

approx.

90

VA

PM

5776:

approx.

110

VA

PM

5775.

—-

PM

5776

Depth

301

Width

231.6 301.6

Height

192

PM

5775:

approx.

7

kg

I.

ACCESSORIES

andard

accessories

(supplied

with

the

instrument)

1

manual

1

mains

flex

ptional

accessories

(to

be

ordered

separately)

Termination

50

22,

1W

PM

9585

Mixing

piece

50

22

PM

9584

Subnano

second

mixing

piece

PM

9583

Coaxial

cables,

SO

2,

type

RG58A-U

with

BNC

connectors

*

Service

code

nr.

Length(mm)

Delay

(ns)

5322

320

10009

200

1

5322

320

10011

400

2

5322

320

10012

600

3

5322

320

10013

1980

10

The

commercial

department

delivers

under

number

PM

9588

a

plastic

pouch

containing

the

following

cables:

5

coaxial

cables,

delay

1

ns

4

coaxial

cables,

delay

2

ns

3

coaxial

cables,

delay

3

ns

3

coaxial

cables,

delay

10

ns

11

IV.

DESCRIPTION

OF

THE

BLOCK

DIAGRAM

(Figs.

IV-1

and

IV-2)

Trigger

circuit

The

pulse

generator

can

be

triggered

either

externally

or

internally.

The

trigger

circuit

(1)

consists

of

a

Schmitt-trigger

controlled

by

external

trigger

or

gate

pulses

which

are

applied

to

socket

TRIGG/GATE

IN,

P1.

When

switch

REPETITION

TIME,

S1,

is

in

position

TRIGG.

OR

SINGLE

SHOT,

a

single

pulse

is

obtained

by

depressing

push-button

SINGLE

SHOT,

SS.

Astable

multivibrator

Gate

This

multivibrator

(II)

supplies

square-wave

pulses

from

which

all

internal

pulses

are

derived.

Controls

REPETITION

TIME,

S1

and

RV1,

enable

adjustment

of

the

repetition

time

between

10ns

and

1

s,

both

in

steps

and

continuously.

The

multivibrator

is

inoperative

when

switch

REPETITION

TIME,

S1,

is

in

position

TRIGG.

or

SINGLE

SHOT.

Both

the

external

and

internal

trigger

pulses

are

fed

to

gate

III.

With

switch

CONT.

GATED,

S6,

in

position

CONT.

the

internal

trigger

pulses

will

pass

the

gate

directly.

If,

however,

switch

CONT.

GATED,

S6,

is

set

to

position

GATED

the

internal

trigger

pulses

will

pass

the

gate

only

when

a

gate

signal

is

applied

to

socket

TRIGG/GATE

IN,

P1.

This

means

that

a

pulse

train

can

be

obtained

which

is

synchronised

with

the

applied

gate

pulse.

Differential

amplifier

and

delay

circuit

The

square-wave

pulses,

either

from

the

multivibrator

or

from

the

trigger

circuit,

are

applied

via

the

sync.

output

pulse

amplifier

IV

to

differential

amplifier

(V).

From

socket

SYNC.

OUT,

P2,

square-wave

pulses

can

be

taken

with

an

amplitude

of

1.2

V.

In

the

differential

amplifier

V

the

square-wave

pulses

are

converted

into

needle

pulses

of

4

ns

width

which

control

the

delay-time

circuit

(VI).

In

the

latter

square-wave

pulses

are

formed

whose

width

can

be

adjusted

from

5

ns.

..0.1

s

by

means

of

the

DELAY

controls,

S2

and

RV2.

After

amplification

in

the

differential

amplifier

(VII)

positive

as

well

as

negative

square-wave

pulses

are

obtained

which

are

differentiated

directly.

The

needle

pulses

which

originate

from

the

trailing

edges

can

be

delayed

with

respect

to

the

needle

pulses

that

originate

from

the

leading

edges.

The

following

differential

amplifier

(VIII)

delivers

a

trigger

pulse

when

a

negative

and

a

positive

needle

pulse

are

applied

simultaneously.

When

switch

SINGLE

DOUBLE,

$7,

is

set

to

position

SINGLE

the

amplifier

is

controlled

by

the

delayed

needle

pulses,

whereas

in

position

DOUBLE

the

amplifier

is

controlled

both

by

the

delayed

and

the

initial

needle

pulses.

In

this

way

single

or

double

needle

pulses

are

obtained

at

the

output

of

the

amplifier.

ifferential

amplifier

and

pulse

width

circuit

The

pulse

width

circuit

(IX)

is

triggered

by

the

needle

pulses

coming

from

the

amplifier

circuit

(VIII).

In

this

circuit

square-wave

pulses

are

formed,

whose

pulse

width

is

adjustable

from

5

ns

. .

.

0.1

s

with

controls

WIDTH,

S3

and

RV3.

When

switch

SINGLE

DOUBLE,

$7,

is

in

position

SINGLE

only

a

single

pulse

is

obtained.

By

switching

to

position

DOUBLE

the

pulse

width

circuit

is

also

triggered

by

the

needle

pulse

which

originates

from

the

leading

edge

of

the

"delay

pulse”’.

Consequently

double

pulses

are

obtained.

The

second

pulse

can

be

delayed

with

respect

to

the

first

one

but

both

pulses

have

the

same

pulse

width.

umplifiers

The

signal

from

the

pulse-width

circuit

is

applied

to

an

amplifier

(X)

with

two

outputs.

One

output

supplies

positive-going

pulses

and

the

other

one

negative-

going

pulses.

The

signals

are

supplied

to

a

chain

of

differential

amplifiers

(XI)

through

the

NORM.

INV.

switch,

$8,

and

one

section

of

the

AMPLITUDE

IN

50

Q

switch,

54.

The

differential

amplifiers

feed

the

driver

stage

(XIII)

with

positive-going

or

negative-going

pulses

depending

on

the

settings

of

switches

NORM.INV.,

S8,

and

AMPLITUDE

IN 50

Q,

S4.

The

pulse

diagram

illustrates

the

interaction

of

the

switches.

iriver

and

output

stage

The

driver

is

an

amplifier

which

controls

the

current

through

the

output

stage

(XIV).

This

current

is

also

continuously

adjustable

with

front

panel

vernier

AMPLITUDE

IN

50

2,

RVS.

urrent

source,

positive

pulse

out

When

leaving

the

output

stage,

the

pulses

are

negative

and

either

positive-going

or

negative-going.

To

obtain

a

positive

pulse

in

positions

+1

V

and

+3

V

of

switch

AMPLITUDE

IN

50

Q,

S4,

a

positive

current

is

added

to

the

output

pulse.

ttenuator

and

d.c.

offset

Switch

AMPLITUDE

IN

50

&,

$4,

also

controls

the

attenuator

(XVI),

consisting

of

two

reed-relays

which

switch

in

a

resistive

network

in

the

+1

V

and

—1

V

positions.

Base-line

shift

both

in

positive

and

negative

direction

is

possible

by

adding

a

direct

current

to

the

output

pulse.

The

current

is

supplied

by

the

d.c.

offset

circuit

and

is

continuously

adjustable

with

control

DC

OFFSET

IN

50

Q,

RV4.

M

5776

The

signals

at

the

outputs

of

amplifier

(X)

are

tapped

off

to

a

second

output

channel,

identical

to

that

of

PM

$775.

The

normal

inverted

mode,

the

positive

or

negative

mode,

the

amplitude

and

d.c.

offset

can

be

individually

chosen.

cIRCUIT

IX

$7:

SINGLE

$8:

INV.

Shi

+

OUTPUT

arte

DIFF.

AMPL.

Rea

om

opocc

econ

aon

opreceee

:

pad

taba

$7:

DOUBLE

xm

rut

ri

SB:

INV.

Ledtea

L-dk.

BES

ik

S5

Ne

Stee

eo

:

SINGLE

7

$7:

SINGLE

'

SB:

INV.

She

x

OUTPUT

7

SHOT

DIFF

AMPL.

2

r

rae

wears

i

ae

i

W

H

$7;

DOUBLE

xm

!

poo

oe

ob

S8:

INV.

:

a

ee

|

ee

a

Ww

bo-----

I

Shins

1

|

$7:

SINGLE

$8:

INV.

oc

orrser

S*"

*

i

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o

OUTPUT

Pat

Aes

Sees

7

a

Cer

ss

P3

tae

oat

$7:

DOUBLE

’

y

bedtes

Leae.s

S8:

INV.

Joc

oreser

S4:

+

i

oh------

fe

OC

OFFSET

$7:SINGLE

S8:

INV.

|

| |

Sh:

+

OUTPUT

P3

Ohb—-—--

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2

Joc

OFFSET

eat

ey

pase

$7:

DOUBLE

pata

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$8:

INV.

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toto

S4:

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WW

Li-------

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NOR,

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S6

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REPTIME

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DELAY

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82

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SINGLE/

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WIDTH

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ASTABLE

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MULTIVIBRATOR

aay

2205...

2208

221,

2216

Z259

2222...2226

2235...2237

2238...2241

2256...2258

Z243...2247

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2213

2215,

|

Z220

2227...2234

Z248...2255

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|

OUT

|

Fig.

IV-2.

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diagram

sto

sg

(aera

ee

:

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‘

AMPLITUDE

})

\

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ate

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7)

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atten,

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DIFE

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:

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MULTIBRATOR

AMPLIFIER

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|

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2204

2205...

2208

2212,

2213

2215,

|

2220

2222...2226

2221

2235...2237

72238...2241

=

2256,..2258

7301...2324

1326,2327,

2227...2234

2243...2247

2268

...2255

|

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\

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22%

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P2

:

iagram

2329,2330,

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;

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eee

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OFFSET

|

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OUTPUT

STAGE

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2336,

-and

-

Z3bb..2347

ATTENUA

~

us

o)

ee

MA6426

DIRECTIONS

FOR

USE

V.

INSTALLATION

A.

SETTING

UP

Always

place

the

instrument

so

that

the

air

circulation

through

the

airvents

in

the

bottom

plate

and

the

top

cover

is

not

impeded.

Otherwise

the

instrument

will

not

be

properly

cooled.

The

ambient

temperature

may

not

exceed

+40

°C.

B.

ADJUSTMENT

TO

THE

LOCAL

MAINS

VOLTAGE

The

mains

voltage

selector

S12

at

the

rear

of

the

instrument

can

be

set

to

two

ranges:

Position

Voltage

range

115

V

100...130

V~

230

V

200...

260

V~

Frequency

50...

400

Hz

The

selector

can

be

operated

with

a

screwdriver

through

a

hole

in

the

rear

panel.

When

changing

from

230

V

to

115

V,

insert

the

screwdriver

in

the

groove

and

push

upwards.

On

delivery

the

instrument

is

adjusted

to

a

mains

voltage

of

200...

260

V.

C.

EARTHING

The

instrument

should

be

earthed

according

to

the

local

safety

regulations.

This

may

be

effected

as

follows:

—

via

the

3-core

mains

flex

—

via

the

earthing

terminal

P5

at

the

rear

of

the

instrument.

DOUBLE

EARTH

CONNECTIONS

SHOULD

BE

AVOIDED

BECAUSE

THEY

MAY

CAUSE

HUM!

D.

SWITCHING

ON

The

instrument

is

switched

on

by

depressing

push-button

POWER

ON,

S11.

The

indicator

lamp,

LA1,

in

the

push-button

will

then

light

up.

E.

FUSES

The

instrument

is

provided

with

three

fuses:

—

one

thermal

fuse

mounted

on

the

primary

of

the

mains

transformer.

—

two

delayed-action

fuses

on

the

secondary

side

of

the

mains

transformer,

located

on

printed

wiring

board

1.

‘.

CONTROLS,

INPUT

AND

OUTPUT

CONNECTORS

‘his

survey

refers

to

both

PM

5775

and

PM

5776.

‘ontrol

or

connector

number

within

brackets

applies

to

PM

5776

only.

‘onttol

or

Designation

Purpose

onnector

1

REPETITION

TIME

Control

of

repetition

time

in

8

steps

TRIGG.

or

SINGLE

SHOT

_

Selection

of

single

shot

operation

or

external

triggering.

Vi

FINE

Fine

control

of

repetition

time.

Provides.

overlap

between

ranges.

2

DELAY

Control

of

delay

time

in

8

steps

V2

FINE

Fine

control

of

delay

time.

Provides

overlap

between

ranges

3

WIDTH

Control

of

pulse

width

in

8

steps

V3

FINE

Fine

control

of

pulse

width.

Provides

overlap

between

ranges

V4

(RV6)

DC

OFFSET

IN

50Q

Continuous

base-line

shift

control

of

t15V

4

(S9)

AMPLITUDE

IN

50Q

Step

control

of

output

pulse

attenuation.

Selection

of

positive-going

or

negative-

going

output

pulses

V5

(RV7)

Fine

control

of

attenuation

)

SINGLE

SHOT

When

S1

is

set

to

position

TRIGG.

OR

SINGLE

SHOT,

one

single

pulse

is

produced

when

S5

is

pressed.

)

CONT.

GATED

Selection

of

continuous

or

gated

pulse

mode

j

SINGLE

DOUBLE

Selection-of

single

or

double

pulse

3

(S10)

NORM.

INV.

Selection

of

normal

or

inverted

output

POWER

ON

pulses

Mains

switch

21

Purpose

EIN

Indicator

lamp

in

POWER

ON

switch

Input

connector

for

triggering

or

gating

pulses

Output

connector

for

square-wave

signal.

Sync.output

pulse

appears

30

ns

before

main

output

pulse.

Output

connector

for

main

pulse.

Input

connector

for

mains

supply

Earthing

connector

Mains

voltage

selector

$9

sl

ave

$5

$10

sil

LAI

|

S$

Pl

OST)

2B

P6

MA6439

Fig.

V-1.

Indication

of

controls,

input/output

sockets

at

the

front

of

PM

5776

P4

PS

$i2

Fig.

V-2.

Indication

of

controls,

input

sockets

at

the

rear

of

PM

5776

SI

su

LA]

Fig.

V-3.

Indication

of

controls,

input/output

sockets

at’

-

—

P5—SI2

h

Fig.

V-4.

Indication

of

controls,

input

sockets

at

the

ri

21

JWER

ON

switch

triggering

or

1

SQuare-

Wave

oulse

appears

utput

pulse.

wr

main

pulse.

mains

supply

9

S|

RV7

S5

$10

su

LAI

i

|

:

|

$6

PI

$7

P2

SB

P3

P6

MA6439

Fig.

V-1.

Indication

of

controls,

input/output

sockets

at

the

front

of

PM

5776

PS

$12

Fig.

V-2.

Indication

of

controls,

input

sockets

at

the

rear

of

PM

5776

SA

SI

wes

ay

—S8

sn

LAI

MA6040

Fig.

V-3.

Indication

of

controls,

input/output

sockets

at

the

front

of

PM

5775

a

e

P4

P5

si2

MA6438

fig.

V-4.

Indication

of

controls,

input

sockets

at

the

rear

of

PM

5775

23

VI.

OPERATION

27

Note:

External

d.c.

voltages

of

up

to

+

3

V

can

be

applied

to

the

PULSE

OUT

connector(s)

of

PM

5775

(PM

5776).

Higher

voltages

may

damage

the

instrument.

A.

FAMILIARIZING

WITH

THE

INSTRUMENT

A.1.

General

To

become

familiar

with

the

PM

5775

or

PM

5776

it

is

recommended

to

exercise

the

procedure

in

paragraphs

A.2

...

A.11,

in

which

the

function

of

controls

and

input/output

connectors

is

explained.

In

the

set-up

a

PHILIPS

sampling

oscilloscope

PM

3400

is

used.

Its

bandwidth

of

1.7

GHz

permits

reproduction

of

the

PM

5775

(PM

5776)

output

risetime

of

less

than

1

nano-second

with

a

negligible

error.

A.2.

Preliminary

control

settings

(see

Figs.

V-1

...

V-4)

SI

RVI

S2

RV2

83

RV3

S4

RVS

RV4

S6

S7

88

RV6

S9

RV7

S10

REPETITION

TIME

FINE

DELAY

FINE

WIDTH

FINE

AMPLITUDE

IN

50

Q

vernier

DC

OFFSET

IN 50

Q

CONT./GATED

SINGLE

DOUBLE

NORM.

INV.

DC

OFFSET

IN

50

2

AMPLITUDE

IN

50

2

vernier

NORM.

INV.

PM

5775

lus

black

dot

5S

ns

black

dot

100

ns

black

dot

+1V

MAX.

OV

CONT.

SINGLE

NORMAL

PM

5776

1

us

black

dot

5

ns

black

dot

100

ns

black

dot

+1V

MAX.

OV

CONT.

SINGLE

NORMAL

OV

+1V

MAX.

NORMAL

ttings

of

the

PM

3400

controls

SENSITIVITY

TRIGG.

TIME

SCALE

MAGN.

TIME/cm

TIME

POSITION

Horizontal

mode

SAMPLES/cm

Vertical

mode

NORMAL/SMOOTHED

POSITION

A

POSITION

B

mV/cm,

A

mV/cm,

B

Pulse

generator

used

PM

5775

PM

5776

SYNC

EXT.—

1,

CAL

1,

CAL

0.2

us

0.2

us

fully

clockwise

fully

clockwise

NORMAL

~

NORMAL

2

o’clock

2

o’clock

A

and

B

NORMAL

Midrange

—

Midrange

20,

CAL.

20,

CAL.

-

20,

CAL.

Fig.

VI-1.

PHILIPS

sampling

oscilloscope

PM

3400

Philips PM 5775 User manual

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