Philips PM 3342 User manual

PHILIPS

WiIUDi

334

OUAI

T0.ACE

AMPI

3342

DUAL

TRACE

UNIT

9499

440

04911

869

IMPORTANT

correspondence

concerning

this

apparatus,

please

quote

the

type

number

and

the

serial

number

given

the

type

plate

the

rear

the

apparatus.

Contents

GENERAL

INFORMATION

XI.

Checking

and

adjusting

Introduction

II.

Technical

data

General

information

III.

Description

the

block

diagram

balance

Levels

channels

and

DIRECTIONS

FOR

USE

Sensitivity

channels

and

-DC

switch;

CHECK

ZERO

IV.

Installation

Square

-wave

response

Controls

and

their

functions

Frequency

response

curve

VI.

Applications

Defection

and

shift

Amplitude

measurements

Differential

measurements

Input

attenuators

Phase

measurements

Blocking

channels

and

Single

time

-base

Rejection

factor

Triggering

SERVICE

NOTES

Cho

pp~

VII.

Block

diagram

Alternate

VIII.

Vertical

amplifier

XII.

Parts

lists

IX.

Switching

control

-circuits

Mechanical

Trigger

amplifier

Electrical

List

figures

Fig.

Page

Block

diagram

Front

view

with

indication

controls

and

connections

Block

diagram

(detailed)

Typical

waveforms

Display

Right-hand

view

TU-5

pulser

Left-hand

view

Measuring

probe,

directly

earthed

Input

standardiser

Amplifier,

channel

Amplifier,

channel

Dual

-trace

unit

Output

amplifier

Trigger

amplifier

Drift

compensator

Attenuator,

channel

Attenuator,

channel

Trigger

-amplifier

circuit

Dual

-trace

circuit

-amplifier

circuit

GENERAL

INFORMATION

Introduction

The

3342

dual

-trace

plug-in

unit

for

the

channel

the

3330.

The

unit

contains

two

identical

amplifiers

with

electronic

switch,

means

which

two

signals

can

compared

amplitude

and

phase.

Technical

data

Note:

Properties,

expressed

numerical

values

with

statement

tolerances

are

guaranteed

the

factory.

Numerical

values

without

tolerances

are

intended

for

information

purposes

only

and

indicate

the

properties

average

apparatus.

Input

circuit

input

impedance

input

maximum

permissible

d.c.

voltage

the

a.c.

position

Measuring

probe

type

input

attenuation

permissible

voltage

Amplifier

deflection

coefficient

Moreover,

the

sum

and

the

difference

two

input

signals

can

displayed.

Trigger

the

time

base

occurs

choice

one

the

two

input

signals

the

combined

signal.

The

amplifier

data

apply

channel

well

channel

adjustable

DC;

push-button

for

checking

the

zero

level

MS2//15pF

BNC

400

9331

A/10

MS2//8

10,

tol.:

1,OOOVpeak

adjustable

calibrated

values:

10,20,

mV/cm

etc.,

V/cm;

tolerance:

continuous

attenuator

(non

-calibrated)

bandwith

D.C.:

0-50

Mc/s

A.C.:

1.6

c/s

—

Mc/s

rise

-time

rise

time

unit

itself:

overshoot

rejection

factor

100

for

frequencies

Mc/s

position

D.C.

provided

that

the

amplifiers

are

adjusted

identical

deflection

-coefficients

maximum

common

mode

input

signal

corresponding

trace

height

magnification

times

useful

screen

height,

symmetrical

round

the

centre

the

screen

for

frequencies

Mc/s.

The

top

signal,

which

magnified

maximum,

can

displayed

with

the

shift

control.

polarity

phase

difference

between

both

channels

Switching

possibilities

externally

chopped

voltage

required

repetition

frequency

rise

time

input

capacitance

Trigger

mode

trace

height

required

positions

DC,

and

position

AUT.

positions

LINE

and

FRAME

Mechanical

data

reversible

not

measurable

the

screen

channel

channels

and

chopped;

frequency

500

kc/s

(internal

selection

facility)

channels

and

alternately

channels

and

added

channels

and

externally

chopped

symmetrical

square

-wave

voltage:

minimum,

_p,

maximum,

100

kc/s

1-100

(in

position

"ADDED"

only)

for

frequencies

Mc/s

for

frequencies

Mc/s

for

frequencies

Mc/s

dimension

width

height

17.5

length

(knobs

and

plug

included)

weight

Accessories

Manual

Optional:

Measuring

probes

PM9331A/10

Description

the

block

diagram

Channels

and

each

consist

input

circuit

which

the

"AC

-DC"

switch

and

the

step

attenuator

are

included.,

and

amplifier

which

containsthe

V/cm

continuous

attenuator,

the

SHIFT

control

and

the

polarity

switch,

see

Fig.

The

switching

these

channels

occurs

the

output

these

amplifiers,

after

which

the

combined

signal

applied

output

amplifier.

The

switching

circuit

consists

blocking

oscillator

CHECK

V/cm

ZEORO

~DC

kHz

r -

I...i

500

kHz

~T'

MODE

• t

•

CHOPPED

•

ALTERNATE

•

ADDED

•

EXT.-CHOPPED

O AC~

DCBAL

MOD

3330

BLOCKING

OSCILLATOR

CATH

FOLL.

AMPLIFIER

and

bi-stable

multivibrator,

which

supplies

the

switching

voltage.

The

trigger

voltage

for

the

basic

oscilloscope

taken

from

one

the

channels

via

selector

switch.

trigger

amplifier

amplifies

this

voltage,

that

the

trigger

signal

and

the

-input

signal

have

identical

amplitudes.

position

"ADDED"

the

"MODE"

selector,

the

trigger

signal

directly

taken

from

the

output

ampli-

er.

NORMAL

INVERT

V'cm

CONT

SHIFT

GAIN

TRIGG

TRIGGER

AMPLIFIER

MULTIVIBRATOR

ELECTR.

TCH

DCBAL

L_-

CHECK

ZERO

/CSR

Fig.

Block

diagram

CATH

FOLL.

GAIN

V/cm

CONT

SHIFT

AMPLIFIER

NORMAL

INVERT

PEM

2633

FINAL

—~

Y-AMPL.

—

POS.

ADDED]

TRIGGER

PRE-AMPL.

STAGE

DIRECTIONS

FOR

USE

Installation

The

3342

shculd

plugged

into

the

left

plug-in

compartment

-UNIT)

basic

oscilloscope

3330.

Switching

-on

is effected

with

the

mains

switch

the

basic

oscilloscope.

Approximately

minutes

after

switching

-on,

the

unit

has

reached

its

operating

temperature

and

meets

the

technical

data.

When

using

the

3342,

the

switch

the

rear

side

the

basic

oscilloscope

should

set

position

"MULTI

-TRACE

CHOPPER".

DN~tIDS

334

DUAL

iRA~

SK8

,.-=..

ate,,..

SK6

---~

Fig.

Front

view

with

indication

controls

and

connections

Controls

and

their

functions

(Fig.

MODE

selector

SKS

~ ~ i i i i

~~`

Trigger

mode

selector

SK6

Input

circuit

The

working

mode

the

unit

can

selected

with

the

six

-position

mode

selector.

channel

switched

in,

channel

out

action

channel

switched

in,

channel

out

action

CHOPPED

both

channels

are

switched

in.

The

volt-

ages

applied

sockets

and

are

elec-

tronically

switched.

The

frequency

which

the

channels

are

switched,

can

adjusted

kc/s

500

kc/s

with

switch

11,

located

aprinted-wiring

board

the

right-hand

side

the

unit.

"ALTER-

channels

and

are

alternately

dis-

NATE"

played.

Switching

occurs

during

the

yback

the

time

-base

voltage.

"ADDED"

the

voltages

the

output

both

ampli-

fiers

Aand

Bare

added.

Dependent

the

position

the

polarity

switches,

the

sum

the

difference

the

input

signals

applied

the

-amplifier

the

basic

oscilloscope.

"EXT.

The

channels

are

switched

with

voltage,

CHOPPED

the

frequency

which

equal

that

BU3"

the

voltage

applied

socket

"EXT.

CHOPPED".

TRIGG

The

trigger

signal

equal

the

voltage

applied

socket

The

trigger

signal

equal

the

voltage

applied

socket

When

the

MODE

selector

position

"ADDED",

the

"TRIGG."

switch

out

action.

that

case

the

trigger

signal

taken

from

the

output

amplifier.

-DC

Via

this

switch,

the

input

socket

con

switch

nected

the

V/cm

switch.

the

DC-

(SK3;

SK9)

position,

the

entire

input

signal

fed

the

V/cm

switch;

the

-position,

the

-component

blocked.

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