Tektronix 5441 User manual

NOTE

A

nomenclature

change

has

been

introduced

for

the

5000

Series

products.

The

5403/D4

is

now

called

the

544

Storage

Oscilloscope.

This

composite

manual

incorporates

the

5403

and

D4

manuals,

formerly

bound

under

separate

cover.

TEKTRONIX®

5441

STORAGE

OSCILLOSCOPE

INSTRUCTION

MANUAL

Tektronix,

Inc.

P.O.

Box

500

Be verton,

Oregon

97077

Seri l

Number

_________________________

070-2140-00

First

Printing

APR

1976

WARRANTY

All

TEKTRONIX

instruments

re

w rr nted

g inst

defective

m teri ls

nd

workm nship

for

one

ye r.

Any

questions

with

respect

to

the

w rr nty

should

be

t ken

up

with

your

TEKTRONIX

Field

Engineer

or

represent tive.

All

requests

for

rep irs

nd

repl cement

p rts

should

be

directed

to

the

TEKTRONIX

Field

Office

or

represent tive

in

your

re .

This

will

ssure

you

the

f stest

possible

service.

Ple se

include

the

instrument

Type

Number

or

P rt

Number

nd

Seri l

Number

with

ll

requests

for

p rts

or

service.

Specific tions

nd

price

ch nge

privileges

reserved.

Copyright

©

1976

by

Tektronix,

Inc.,

Be verton,

Oregon.

Printed

in

the

United

St tes

of

Americ .

All

rights

reserved.

Contents

of

this

public tion

m y

not

be

reproduced

in

ny

form

without

permission

of

Tektronix,

Inc.

U.S.A,

nd

foreign

Tektronix

products

covered

by

U.S.

nd

foreign

p tents

nd/or

p tents

pending.

TEKTRONIX

is

registered

tr dem rk

of

Tektronix,

Inc.

D41

TABLE

OF

CONTENTS

SECTION

0

SECTION

1

Page

INSTALLATION

PROCEDURE

0-1

OPERATING

INSTRUCTIONS

ASIC

OPERATION

Setup

Information

1-1

Calibration

Check

1-2

Readout

1-2

eam

Finder

1-2

External

Intensity

Input

1-2

Storage

Operation

(Variable

Persistence)

1-2

Storage

Operation

(Without

Variable

Persistence)

1-3

GENERAL

OPERATING

INFORMATION

Graticule

1-3

Intensity

Control

1-3

Display

Focus

1-3

Trace

Alignment

Adjustment

1-3

eam

Finder

1-4

Readout

(Works

Only

With

5400-Series

Plug-In

Units)

1-4

Option

3,

Externally

Programmed

Seventh

and

Eighth

Readout

Words

1-4

Care

of

Storage

Screen

1-4

Storage

Operation

1-5

Intensity

Modulation

1-5

Calibrator

1-5

Display

Photography

1-5

Oscilloscope

Applications

1-5

I

D41

TABLE

OF

CONTENTS

(cont)

SECTION

2

THEORY

OF

OPERATION

Z-AXIS

AMPLIFIER

AND

CRT

CIRCUIT

Page

Z-AXIS

AMPLIFIER

AND

CRT

CIRCUIT

Z-Axis

Amplifier

2-1

High-Voltage

Regulator

2-1

High-Voltage

Outputs

2-1

CRT

Control

Circuits

2-2

HORIZONTAL

AMPLIFIER

Input

Amplifier

Output

Amplifier

2-2

VERTICAL

AMPLIFIER

Delay

Line

2-2

Amplifier

2-3

STORAGE

CIRCUIT

Flood-Gun

Filaments

2-3

Flood-Gun

Cathode

2-3

Flood-Gun

Anode

2-3

Collimation

Electrodes

(CE)

2-4

Collector

Mesh

2-4

Storage

Mesh

2-4

Erase

Generator

2-4

Variable

Persistence

and

Save

2-4

II

D41

TABLE

OF

CONTENTS

(cont)

SECTION

3

SERVICE

INFORMATION

Page

SPECIFICATIONS

Table

3-1

—

5403-D41

Vertical

Amplifier

Table

3-2

—

5403-D41

Horizontal

Amplifier

Table

3-3

—

D41

Z-Axis

Amplifier

Table

3-4

—

D41

Cathode-Ray

Tube

Table

3-5

—

5403-D41

Power

Supply

and

Calibrator

Table

3-6

—

5403-D41

Readout

Table

3-7

—

D41

Miscellaneous

Table

3-8

—

5403-D41

Environmental

Table

3-9

-5403-D41

Physical

Electrical

Parts

List

Controls

and

Connectors,

and

Symbols

Adjustment

Operational

Checks

( ack

Side

of

Foldout)

lock

Diagram

Vert

Parts

Location

Grid

and

Adjustments

( ack

Side

of

Foldout)

Vertical

Amplifier

Horiz

Parts

Location

Grid

and

Adjustments

( ack

Side

of

Foldout)

Horizontal

Amplifiers

High-Voltage

Parts

Location

Grid

and

Adjustments

( ack

Side

of

Foldout)

Z-Axis

Amplifier

&

CRT

Circuit

Storage

Parts

Location

Grid

and

Adjustments

( ack

Side

of

Foldout)

Storage

Circuit

Interconnect

and

Voltage

Distribution

Diagram

3-1

3-2

3-3

3-4

3-5

<

>

<2>

<3>

<

4

>

<

5

>

Mechanical

Parts

List

Fig.

1

Exploded

View

Accessories

REV.

B,

MAR.

1977

iii

D41

INSTALLATION

PROCEDURE

Before

you

st rt

1.

Check

the

power

supply/amplifier

module

rear

panel

markings.

If

the

factory

settings

are

compatible

with

the

available

line

voltage

and

frequency,

insert

the

desired

plug-ins.

Use

the

bail

to

raise

the

front

of

the

instrument.

...go

to

Oper ting

Instructions...

2.

If

a

change

is

needed,

follow

these

steps:

In-service

line-selector

block

■

In-service

line-selector block

Brown

120

V

The

instr ment

can be

damaged

by

sing the

120

V

Line

Selector

block

with

a

220

V

nominal

line

voltage.

Fig.

0-1.

Illustr tion

showing

portion

of

power

supply/ mplifier

module's

L.V.

power

supply

circuit

bo rd.

0-1

D41

.

Line

Selector

Block(s)

Remove

the

Scope-Mobile

retainer

blocks

and

their

screws,

then

remove

the

bottom

dust

cover

from

the

power

supply/amplifier

module

by

turning

the

four

slotted

fasteners

a

quarter

turn

counterclockwise.

This

gives

easy

access

to

the

Line

Selector

blocks

located

on

the

LV

power

supply

circuit

board.

Regulating

Ranges

for

Power

Transformer

Line

Selector

lock

Position

Regulating

Ranges

120

Volts

Nominal

220

Volts

Nominal

L

90

VAC

to

110

VAC

180

VAC

to

220

VAC

M

99

VAC

to

121

VAC

198

VAC

to

242

VAC

H

108

VAC

to

132

VAC

216

VAC

to

264

VAC

Line

Fuse

Data

1.25

A

slow-blow

0.7

A

slow-blow

b.

Line

R nge

T ps

c.

Re r

P nel

Fig.

0-2.

Prim ry

t ps

re

of

power

supply/ mplifier

module's

L.V.

power

supply

circuit

bo rd.

3.

Replace

the

bottom

dust

cover

and

the

two

Scope-Mobile

retainer

blocks

on

the

power

supply/amplifier

module.

4.

If

necessary,

change

the

line

cord

power

plug

to

match

the

power

source

receptacle

or

use

an

adapter.

Fig.

0-3.

View

showing

re r-p nel

of

power

supply/ mplifier

module.

5.

Plug

the

cord

into

the

power

source.

6.

Insert

the

desired

plug-ins.

7.

Use

the

bail

to

raise

the

front

of

the

instrument.

...go

to

Oper ting

Instructions...

0-2

D41

Section

1

—

D41

OPERATING

INSTRUCTIONS

The

D41

Single

eam

storage

display

module

operates

with

a

Tektronix

5400-series

power

supply/amplifier

module

to

form

an

oscilloscope

mainframe.

This

section

gives

a

familiarization

procedure,

and

general

operating

information.

The

Installation

section

of

the

5403

instruction

manual

should

be

referred

to

for

initial

preparation.

It

contains

information

for

installation

of

plug-ins,

correct

operating

voltage

and

temperature,

and

general

oscilloscope

usage.

A

brief

description

of

the

function

of

the

front

and

rear

panel

controls

and

connectors

is

given

on

the

controls

and

connectors

foldout

page.

More

detailed

information

is

given

under

General

Operating

Information.

BASIC

OPERATION

Setup

Information

The

following

steps

demonstrate

the

use

of

the

controls

and

connectors

of

the

D41

.

Amplifier

Plug-In

1.

Make

sure

the

oscilloscope

system

is

complete.

The

D41

must

be

properly

connected

to

the

power

supply/

amplifier

module.

A

5A-series

amplifier

plug-in

should

be

in

one

of

the

vertical

(left

or

center)

plug-in

compartments

and

a

5 -series

time-base

plug-in

should

be

in

the

horizontal

(right)

compartment.

Display

Position

Ch

1

Volts/Div

CH

1

Variable

Volts/Div

CH

1

Input

Coupling

Trigger

Mode

On

Centered

.1

Cal

(fully

clockwise)

DC

CH

1

CH

1

Time-B se

Plug-In

2.

Set

the

POWER

switch

to

off

(pushed

in)

and

connect

the

D41

to

a

power

source

that

meets

the

voltage

and

frequency

requirements

of

this

instrument.

See

Installa



tion

section

in

this

manual,

or

in

the

5403

manual.

3.

Turn

the

INTENSITY

and

READOUT

INTENS

controls

counterclockwise

and

pull

the

POWER

switch

out

to

turn

the

instrument

on.

Set

the

front-panel

controls

as

follows:

Display

Position

Main

Sec/Div

Variable

Seconds/Div

Mag

Main

Trig

Level

Source

D41

Coupling

Mode

Alternate

( utton

out)

Centered

5

ms

Cal

(fully

clockwise)

Off

( utton

out)

Counterclockwise

Left

(or

Right

if

the

amplifier

plug-in

is

in

the

center

compartment)

Auto

Trig,

AC

Coupl,

+

Slope

Main

Sweep

STORE

SAVE

WRITING

SPEED

VARIA LE

PERSIST

(and

Save

Time)

INTENSITY

FOCUS

READOUT

INTENS

GRAT

ILLUM

EAM

FINDER

POWER

Non-Store

( utton

out)

Off

( utton

out)

Midrange

See

text

above

As

is

See

text

above

As

desired

Not

depressed

See

text

above

4.

Advance

the

INTENSITY

control

until

the

trace

is

at

the

desired

viewing

level.

The

trace

should

appear

near

the

graticule

center.

5.

Connect

a

1X

probe

or

test

lead

from

the

CALI



RATOR

loop

to

the

amplifier

plug-in

input

connector.

6.

Turn

the

Main

Trig

Level

control

clockwise

until

a

stable

display

is

obtained.

Adjust

the

vertical

and

horizontal

1-1

Operating

Instructions

—

D41

Position

controls

so

that

the

display

is

centered

vertically

and

starts

at

the

left

edge

of

the

graticule.

7.

Adjust

the

FOCUS

control

for

a

sharp,

well-defined

display

over

the

entire

trace

length.

8.

Disconnect

the

input

signal

and

position

the

trace

vertically

so

that

it

coincides

with

the

center

horizontal

line

of

the

graticule.

9.

If

the

trace

is

not

parallel

with

the

center

horizontal

line,

see

Trace

Alignment

Adjustment

in

this

section.

10.

Rotate

the

GRAT

ILLUM

control

throughout

its

range

and

notice

that

the

graticule

lines

are

illuminated

as

the

control

is

turned

clockwise.

Set

control

so

graticule

lines

are

illuminated

as

desired.

C libr tion

Check

11.

Move

the

trace

two

divisions

below

graticule

center

and

reconnect

the

calibrator

signal

to

the

amplifier

plug-in

input

connector.

12.

The

display

should

be

four

divisions

in

amplitude

with

six

complete

cycles

(five

complete

cycles

for

50-hertz

line

frequency)

shown

horizontally.

An

incorrect

display

indicates

that

the

oscilloscope

mainframe

or

plug-ins

need

to

be

recalibrated.

Re dout

13.

Turn

the

READOUT

INTENS

control

clockwise

until

an

alpha-numeric

display

is

visible

within

the

top

or

bottom

division

of

the

CRT

(reset

the

FOCUS

adjustment

if

necessary

for

best

definition

of

the

readout).

Change

the

Volts/Div

switch

of

the

amplifier

plug-in

that

is

selected

for

display.

Notice

that

the

readout

portion

of

the

display

changes

as

the

deflection

factor

is

changed.

Likewise,

change

the

Sec/Div

switch

of

the

time-base

unit

that

is

selected

for

display.

Notice

that

the

readout

display

for

the

time-base

unit

changes

also

as

the

sweep

rate

is

changed.

14.

Set

the

time-base

unit

for

magnified

operation.

Notice

that

the

readout

display

changes

to

indicate

the

correct

magnified

sweep

rate.

If

a

readout-coded

10X

probe

is

available

for

use

with

the

vertical

unit,

install

it

on

the

input

connector

of

the

vertical

plug-in.

Notice

that

the

deflection

factor

indicated

by

the

readout

is

increased

by

10

times

when

the

probe

is

added.

Return

the

time-base

unit

to

normal

sweep

operation

and

disconnect

the

probe.

15.

Notice

that

the

readout

for

a

particular

plug-in

occupies

a

specific

location

on

the

display

area.

If

either

of

the

vertical

plug-in

units

is

a

dual-trace

unit,

notice

that

the

readout

for

channel

2

appears

within

the

lower

division

of

the

CRT

below

the

readout

for

channel

1.

Be m

Finder

16.

Move

the

display

off-screen

with

the

vertical

posi



tion

control.

17.

Push

the

EAM

FINDER

button

and

observe

that

the

display

compresses

into

the

screen

area.

Reposition

the

display

to

screen

center

and

release

the

EAM

FINDER

button.

Extern l

Intensity

Input

18.

Connect

a

5

volt,

1

kHz

sine-wave

or

square-wave

signal

to

the

EXT

INTENSITY

INPUT

connector

on

rear

panel

of

D41.

Also,

use

the

signal

to

externally

trigger

the

time-base

plug-in.

19.

Slowly

rotate

the

INTENSITY

control

counter



clockwise

until

the

trace

appears

to

be

a

series

of

dimmed

and

brightened

segments.

The

brightened

segments

corre



spond

with

the

tops

of

the

square

waves.

Stor ge

Oper tion

(V ri ble

Persistence)

20.

Disconnect

the

5

volt,

1

kHz

sine-wave

or

square



wave

signal

from

the

EXT

INTENSITY

INPUT

connector.

Reset

the

time-base

plug-in

triggering

controls

for

an

internally-triggered

display

from

the

vertical

plug-in.

21.

After

making

sure

the

calibrator

signal

is

still

connected

to

the

amplifier

plug-in

input

connector,

set

the

controls

on

the

time-base

plug-in

for

single-sweep

opera



tion.

Press

the

STORE

button

and

note

that

the

CRT

will

momentarily

be

flooded

positive

(becoming

quite

bright).

22.

Press

the

Reset

button

on

the

time-base

plug-in.

One

sweep

will

be

generated,

and

a

display

should

be

visible,

but

will

fade

out

within

a

few

seconds.

Increase

the

VARI



A LE

PERSIST

control

setting

if

a

display

of

longer

retention

is

required.

Increase

the

WRITING

SPEED

setting

to

increase

the

background

level

for

viewing

lightly

written

information.

If

there

is

no

display

visible,

increase

the

INTENSITY

control

setting

and

press

the

Reset

button.

23.

Press

the

ERASE

button;

the

CRT

should

turn

positive

and

erase.

Press

the

Reset

button

on

the

time-base

plug-in

to

obtain

another

stored

display

on

the

CRT.

Press

1-2

Operating

Instructions

—

D41

the

SAVE

button;

the

display

is

stored

and

no

other

sweep

or

change

in

position

will

affect

the

display.

The

SAVE

button,

when

pushed,

locks

out

the

sweep

erase

circuit

and

cuts

off

the

current

to

the

flood

gun

cathode

as

long

as

the

VARIA LE

PERSIST

control

is

turned

fully

clockwise

(display

stored

at

the

maximum

time).

Turning

the

PERSIST

(Save

Time)

control

counterclockwise

will

decrease

the

time

a

stored

display

is

retained

on

the

CRT.

When

the

display

is

not

being

used,

turn

the

PERSIST

(Save

Time)

control

fully

clockwise;

the

display

will

not

be

visible

on

the

screen,

but

the

information

has

not

been

lost

or

destroyed.

Turn

the

PERSIST

(Save

Time)

control

counter



clockwise

until

a

display

is

visible

when

needed.

When

the

instrument

is

in

the

"SAVE

”

mode

and

the

PERSIST

(Save

Time)

control

is

fully

clockwise,

the

instrument

can

be

turned

off

without

losing

any

stored

information.

Turn

the

instrument

on

again

and

turn

the

PERSIST

(Save

Time)

control

counterclockwise

until

display

appears.

NOTE

The

D4

Save

Time

control

and

the

Variable

Persist



ence

control

are

combined

into

one

control.

If

the

PERSIST

(Save

Time)

control

has

been

adjusted

to

view

the

display

in

the

'Save'

mode

and

the

D4

is

then

taken

out

of

the

'Save'

mode,

the

display

will

fade

rapidly,

since

the

persistence

is

now

set

for

a

shorter

time.

Stor ge

Oper tion

(Without

V ri ble

Persistence)

24.

Rotate

the

VARIA LE

PERSIST

control

to

its

fully

counterclockwise

position

and

release

the

SAVE

button

to

its

off

(button

out)

position.

25.

Press

the

Reset

button

on

the

time-base

plug-in.

One

sweep

will

be

generated,

and

a

display

should

be

visible.

Increase

the

WRITING

SPEED

setting

if

a

brighter

display

is

required.

If

there

is

no

display

visible,

increase

the

INTENSITY

control

setting

and

press

the

Reset

button.

26.

Press

the

ERASE

button

and

note

that

the

stored

waveform

is

erased.

Another

display

can

be

stored

by

pressing

the

Reset

button

on

the

time-base

plug-in.

27.

Turn

READOUT

INTENS

control

slowly

clockwise

to

the

point

where

the

stored

readout

information

doesn't

spread.

This

completes

the

description

of

the

basic

operating

procedure

for

the

D41.

Instrument

operations

not

explained

here,

or

operations

that

need

further

explanation

are

discussed

under

General

Operating

Information.

GENERAL

OPERATING

INFORMATION

Gr ticule

The

graticule

of

the

D41

is

internally

marked

on

the

faceplate

of

the

CRT

to

provide

accurate,

parallax-free

measurements.

The

graticule

is

marked

with

eight

vertical

and

ten

horizontal

divisions.

Each

division

is

0.9

cm

by

0.9

cm.

In

addition,

each

major

division

is

divided

into

five

minor

divisions.

The

vertical

gain

and

horizontal

timing

are

calibrated

to

the

graticule

so

that

accurate

measurements

can

be

made

from

the

graticule.

The

illumination

of

the

graticule

lines

can

be

varied

with

the

GRAT

ILLUM

control.

Intensity

Control

The

intensity

of

the

display

on

the

CRT

is

controlled

by

the

INTENSITY

control.

This

control

is

adjusted

so

the

display

is

easily

visible

but

not

overly

bright.

It

will

probably

require

readjustment

for

different

displays

or

sweep

rates.

Particular

care

should

be

exercised

when

only

a

spot

is

displayed.

A

high-intensity

spot

may

burn

the

CRT

phosphor

and

cause

permanent

damage

to

the

CRT

if

allowed

to

remain

too

long.

Displ y

Focus

If

a

well-defined

display

cannot

be

obtained

with

the

FOCUS

control,

even

at

low

intensity

settings,

adjustment

of

the

internal

astigmatism

control

may

be

required.

To

check

for

proper

setting

of

the

Astig

control,

slowly

turn

the

FOCUS

control

through

the

optimum

setting

with

a

signal

displayed

on

the

CRT

screen.

If

the

Astig

control

is

correctly

set,

the

vertical

and

horizontal

portions

of

the

trace

will

come

into

sharpest

focus

at

the

same

position

of

the

FOCUS

control.

Tr ce

Alignment

Adjustment

If

a

free-running

trace

is

not

parallel

with

the

horizontal

graticule

lines,

set

the

Trace

Rotation

adjustment

(internal

adjustment)

as

follows:

Position

the

trace

to

the

center

horizontal

line

and

adjust

the

Trace

Rotation

adjustment

so

that

the

trace

is

parallel

with

the

horizontal

graticule

lines.

1-3

Operating

Instructions

—

D41

Be m

Finder

The

EAM

FINDER

switch

provides

a

means

of

locating

a

display

that

overscans

the

viewing

area

either

vertically

or

horizontally.

When

the

EAM

FINDER

switch

is

pressed,

the

display

is

compressed

within

the

graticule

area

and

the

display

intensity

is

increased.

To

locate

and

reposition

an

overscanned

display,

use

the

following

procedure:

1.

Press

the

EAM

FINDER

switch,

hold

it

in,

then

increase

the

vertical

and

horizontal

deflection

factors

until

the

display

is

within

the

graticule

area.

2.

Adjust

the

vertical

and

horizontal

position

controls

to

center

the

display

about

the

vertical

and

horizontal

centerlines.

The

READOUT

INTENS

control

determines

the

inten



sity

of

only

the

readout

portion

of

the

display

independent

of

the

other

traces.

The

readout

system

is

inoperative

in

the

fully

counterclockwise

OFF

position.

This

may

be

desirable

when

the

top

and

bottom

divisions

of

the

graticule

are

to

be

used

for

waveform

display,

or

when

the

trace

inter



ruptions

necessary

to

display

characters

do

not

allow

a

satisfactory

waveform

display

to

be

obtained.

Option

3,

Extern lly

Progr mmed

Seventh

nd

Eighth

Re dout

Words

This

option

adds

a

25-pin

connector

to

the

rear

panel

of

the

display

module,

through

which

two

ten-character

readout

words

can

be

displayed

on

the

CRT,

see

Fig.

1

-1.

3.

Release

the

EAM

FINDER

switch;

the

display

should

remain

within

the

viewing

area.

Re dout

(Works

Only

With

5400-Series

Plug-In

Units)

The

readout

system

of

the

power

supply/amplifier

and

display

modules

allows

alpha-numeric

display

of

infor



mation

on

the

CRT,

along

with

the

analog

waveform

displays.

The

information

displayed

by

the

readout

system

is

obtained

from

the

plug-in

units

that

are

installed

in

the

plug-in

compartments.

The

characters

of

the

readout

display

are

written

by

the

CRT

beam

on

a

time-shared

basis

with

the

signal

waveforms.

C re

of

Stor ge

Screen

The

following

precautions

will

prolong

the

useful

storage

life

of

the

CRT

screen

used

in

this

instrument.

1.

Use

the

minimum

beam

intensity

required

to

produce

a

clear,

well-defined

display.

A

too-high

beam

intensity

may

permanently

damage

the

CRT

screen,

particularly

if

a

bright

spot

is

allowed

to

remain

stationary

on

the

display

area.

The

Readout

System

operates

in

a

free-running

mode

to

interrupt

the

waveform

display

to

present

characters.

The

waveform

display

is

interrupted

for

only

about

20

micro



seconds

for

each

character

that

is

displayed.

Left

Vertic l

Ch nnel

1

Horizont l

A

or

M in

B

or

Del yed

Right

Vertic l

Ch nnel

1

The

readout

information

from

each

plug-in

is

called

a

word.

Up

to

six

(eight

with

option

3)

words

of

readout

information

can

be

displayed

on

the

display

module

(a

seventh

and

eighth

word

are

available

when

option

3

is

installed).

The

location

at

which

each

readout

word

is

presented

is

fixed

and

is

directly

the

plug-in

unit

and

channel

from

which

it

originated.

Fig.

1-1

shows

the

area

of

the

graticule

where

the

readout

from

each

plug-in

unit

channel

is

displayed

(external

readout

programming

is

available

only

with

option

3).

Notice

that

the

readout

from

channel

1

of

each

plug-in

unit

is

displayed

within

the

top

division

of

the

graticule

and

the

readout

from

channel

2

is

displayed

directly

below

within

the

bottom

division

of

the

graticule.

Only

the

readout

from

plug-in

channels

that

are

selected

by

display

switches,

or

by

the

mode

switches

of

dual-channel

plug-ins,

appears

in

the

readout

display.

Left

Vertic l

Ch nnel

2

Right

Vertic l

Ch nnel

2

Extern l

Word

(Ch nnel)

1

Extern l

Word

(Ch nnel)

2

Extern l

re dout

inform tion

when

option

is

inst lled.

Fig.

1-1.

Loc tion

of

re dout

on

the

crt

identifying

the

origin ting

plug-in

unit

nd

ch nnel

( nd

extern l,

if

Option

3

is

inst lled).

1-4

Operating

Instructions

—

D41

2.

Avoid

repeated

use

of

the

same

area

of

the

screen.

If

a

particular

display

is

being

stored

repeatedly,

change

the

vertical

position

occasionally

to

use

other

portions

of

the

display

area.

3.

Do

not

leave

a

stored

display

on

the

screen

when

it

is

no

longer

needed.

4.

Operate

the

instrument

in

the

non-store

mode

unless

storage

is

required.

obtained

by

applying

signals

between

these

levels.

Maxi



mum

safe

input

voltage

is

+

or

—

50

volts.

Usable

frequency

range

of

the

Z-Axis

circuit

is

DC

to

two

megahertz.

Time

markers

applied

to

the

EXT

INTENSITY

INPUT

provide

a

direct

time

reference

on

the

display.

With

uncalibrated

horizontal

sweep

or

X-Y

operation,

the

time

markers

provide

a

means

of

reading

time

directly

from

the

display.

However,

if

the

markers

are

not

time-related

to

the

displayed

waveform,

a

single-sweep

display

should

be

used

(for

internal

sweep

only)

to

provide

a

stable

display.

Stor ge

Oper tion

The

storage

feature

greatly

increases

the

versatility

of

the

5403-D41

Oscilloscope.

The

storage

cathode-ray

tube

allows

a

display

to

be

retained

for

a

longer

period

of

time.

When

the

STORE

button

is

out,

the

instrument

operates

as

a

conventional

oscilloscope.

When

the

STORE

button

is

pressed

in,

the

instrument

operates

in

a

storage

mode.

Two

modes

of

storage

are

available.

They

are

Variable

Persistence,

where

the

persist



ence

of

the

CRT

is

electrically

controlled

by

the

PERSIST

control;

and

a

SAVE

mode,

that

allows

longer

retention

of

the

displayed

information.

When

the

SAVE

button

is

pressed

in,

a

lockout

function

prevents

accidental

erasure

of

the

stored

display.

A

stored

display

is

erased

by

pressing

the

ERASE

switch.

In

the

SAVE

mode,

the

erase

function

is

disabled.

C libr tor

The

internal

calibrator

of

the

D41

provides

a

convenient

signal

source

for

checking

basic

vertical

gain

and

sweep

timing.

The

calibrator

signal

is

also

very

useful

for

adjusting

probe

compensation,

as

described

in

the

probe

instruction

manual.

The

output

square-wave

voltage

is

400

millivolts,

within

1%,

and

the

square-wave

current

is

4

milliamperes,

within

1%.

The

frequency

of

the

square-wave

signal

is

twice

the

power-line

frequency.

The

signal

is

obtained

by

clipping

the

probe

to

the

loop.

Displ y

Photogr phy

A

permanent

record

of

the

CRT

display

can

be

obtained

with

an

oscilloscope

camera

system.

The

CRT

bezel

of

the

D41

provides

integral

mounting

for

a

Tektronix

oscillo



scope

camera.

The

instruction

manuals

for

the

Tektronix

oscilloscope

cameras

include

complete

instructions

for

obtaining

waveform

photographs.

Intensity

Modul tion

Intensity

(Z-Axis)

modulation

can

be

used

to

relate

a

third

item

of

electrical

phenomena

to

the

vertical

(Y-Axis)

and

the

horizontal

(X-Axis)

coordinates

without

affecting

the

waveshape

of

the

displayed

signal.

The

Z-Axis

modu



lating

signal,

applied

to

the

EXT

INTENSITY

INPUT,

changes

the

intensity

of

the

displayed

waveform

to

provide

this

type

of

display.

The

voltage

amplitude

required

for

visible

trace

modulation

depends

on

the

setting

of

the

INTENSITY

control.

About

+5

volts

will

turn

on

the

display

to

a

normal

brightness

level

from

an

off

level,

and

about

—

5

volts

will

turn

the

display

off

from

a

normal

brightness

level.

"Gray

scale"

intensity

modulation

can

be

Oscilloscope

Applic tions

The

5400-series

oscilloscope,

including

its

associated

display

module

and

plug-in

units,

provides

a

very

flexible

measurement

system.

Specific

applications

for

the

indi



vidual

plug-ins

are

described

in

the

manuals

for

those

units.

Refer

to

the

Operating

Instructions

section

of

the

5403

instruction

manual

for

basic

oscilloscope

applications,

including

peak-to-peak

AC

voltage

measurements,

instan



taneous

DC

voltage

measurements,

comparison

measure



ments,

time

duration

measurements,

determining

frequency,

risetime

measurements,

and

phase-difference

measurements.

1-5

Section

2

—

D41

THEORY

OF

OPERATION

Z-AXIS

AMPLIFIER

AND

CRT

CIRCUIT

The

CRT

circuit

produces

the

high

voltage

potentials

and

provides

the

control

circuits

necessary

for

operation

of

the

cathode-ray

tube

(CRT).

The

Z-Axis

amplifier

circuit

is

included

with

the

CRT

circuit

discussion,

since

it

sets

the

intensity

of

the

CRT

display.

Z-Axis

Amplifier

The

Z-Axis

amplifier

is

a

current

driven,

shunt-feedback

operational

amplifier

with

a

voltage

output.

The

amplifier

consists

of

Q345,

Q352,

and

Q356.

The

feedback

path

is

from

the

Q352-Q356

collectors

through

C350-R349-R350

to

the

summing

point

at

the

base

of

Q345.

Q352

and

Q356

are

connected

as

a

collector-coupled

complementary

amplifier

that

provides

a

fast

linear

output

signal

while

consuming

minimum

quiescent

power.

Q356

acts

as

the

pull-up

transistor

and

Q352

acts

as

the

pull-down

transistor

for

the

amplifier.

The

output

voltage

from

the

amplifier

provides

the

drive

signal

to

control

the

CRT

intensity

level

through

the

control-grid

supply.

The

output

voltage

level

of

the

Z-Axis

amplifier

is

determined

by

the

voltage

drop

across

R349

and

R350

in

reference

to

the

voltage

level

at

the

summing

point

for

the

amplifier

(base

of

Q345).

The

current

through

R349-R350

is

determined

by

the

input

current

from

any

combination

of

several

sources,

such

as

INTENSITY

control,

plug-in

interface

(unblanking,

readout

unblanking),

and

from

Q320

and

Q335.

Q320

is

an

operational

amplifier

that

sets

the

EXT

INTENSITY

INPUT

connector

signal

to

a

level

suitable

for

proper

Z-Axis

amplifier

response.

Q335

acts

as

an

electronic

switch

to

cause

the

CRT

display

intensity

to

increase

when

the

EAM

FINDER

switch

is

pushed.

Q340

acts

as

an

impedance-matching

and

bias-setting

transistor

for

the

Z-Axis

amplifier.

CR352

and

current

limiting

resistor

R352

act

as

a

protection

circuit

for

the

Z-Axis

amplifier

in

case

of

a

high-voltage

short.

High-Voltage

Regulator

High-Volt ge

Prim ry.

A

repetitive,

sinusoidal

signal

is

produced

by

a

regenerative

feedback

oscillator

in

the

primary

of

T410

and

induced

into

the

secondary.

Current

drive

for

the

primary

winding

is

furnished

by

Q410.

The

conduction

of

Q410

is

controlled

by

the

collector

voltage

of

Q400.

High-Volt ge

Regul tion.

Regulation

is

accomplished

by

sampling

the

—

1.5

kV

across

voltage

divider

R395A-R395 .

If

the

output

level

of

the

cathode

supply

goes

above

the

nominal

—

1.5kV

(goes

more

negative),

the

input

base

of

Darlington

transistor

Q390

goes

negative

from

its

quiescent

0

V.

The

output

of

Q390

goes

more

positive,

reducing

the

conduction

of

Q400

and

Q410.

This

reduces

the

peak-to-peak

sinusoidal

signal

amplitude,

resulting

in

a

reduced

voltage

in

the

secondary

of

T410.

Conversely,

if

the

output

decreases

below

—

1.5

kV

(goes

more

positive),

Q410

will

conduct

more,

i.e.,

have

a

larger

sinusoidal

signal

amplitude.

CR395

and

C395

form

a

delay

turn-on

circuit

to

prevent

the

CRT

beam

from

coming

on

immediately

at

instrument

turn-on.

The

delay

time

is

controlled

by

the

time

it

takes

the

(+)

end

of

C395

to

charge

to

+30.6

V

through

R392

from

the

+200

V

power

supply.

At

the

moment

the

top

of

C395

reaches

+30.6

V,

diode

CR395

will

turn

on

and

clamp

the

CR395-C395-R397-R395A

junction

at

+30.6

V.

R402

and

C402

limit

the

bandwidth

of

the

regulator

to

prevent

oscillations.

High-Voltage

Outputs

The

secondary

winding

of

T410

provides

the

negative

and

positive

accelerating

potentials

for

the

CRT

and

the

bias

voltage

for

the

control

grid.

Positive

accelerating

voltage

for

the

CRT

screen

is

supplied

by

voltage

doubler

U410.

The

applied

voltage

to

the

input

of

U410

from

the

T410

secondary

winding

is

about

+1.5

kV

peak-to-peak.

The

output

voltage

of

U410

is

about

+7

kV

at

the

CRT

anode.

The

negative

accelerating

voltage

for

the

CRT

cathode

is

also

obtained

from

the

T410

secondary

winding.

CR412

half-wave

rectifies

the

transformer

output

and

supplies

the

—

1.5

kV

to

the

CRT

cathode.

R419

connects

the

CRT

cathode

voltage

to

the

CRT

filament

to

prevent

cathode-to-filament

breakdown.

Diodes

CR420

and

CR422

provide

the

rectified

negative

control

voltage

for

the

CRT

control

grid.

The

output

level

of

this

supply

is

set

by

the

Intens

Range

adjustment

R435.

Diodes

CR428

and

CR430

clip

the

CRT

grid

bias

voltage

from

the

T410

secondary,

to

determine

the

operating

level

at

the

control

grid.

CR428

limits

the

negative

excursion

of

the

bias

voltage,

depending

upon

the

output

voltage

of

the

Z-Axis

amplifier.

The

positive

clipping

level

at

the

cathode

of

CR430

is

set

by

the

Intens

Range

adjustment.

CR420

acts

as

a

DC

restorer

and

CR422

as

a

rectifier.

This

results

2-1

Theory

of

Operation

—

D41

in

a

DC

level

across

R422

equal

to

the

peak-to-peak

excursion

at

the

anode

of

CR430.

CRT

Control

Circuits

In

addition

to

the

INTENSITY

control

discussed

previously,

front-panel

FOCUS

and

internal

astigmatism

controls

have

been

incorporated

for

arriving

at

an

optimum

CRT

display.

FOCUS

control

R440

provides

the

correct

voltage

for

the

second

anode

in

the

CRT.

Proper

voltage

for

the

third

anode

is

obtained

by

adjusting

Astig

control

R370.

In

order

to

obtain

optimum

spot

size

and

shape,

both

the

FOCUS

and

Astig

controls

are

adjusted

to

provide

the

proper

electrostatic

lens

configuration

in

the

CRT.

The

Geom

adjustment

R365

varies

the

positive

level

on

the

horizontal

deflection

plate

shields

to

control

the

overall

geometry

of

the

display.

The

trace

rotation

control,

R375,

permits

adjustment

of

the

DC

current

through

beam-rotation

coil

L375

to

align

the

display

with

the

horizontal

graticule

lines.

HORIZONTAL

AMPLIFIER

The

horizontal

amplifier

amplifies

the

push-pull

horizontal

deflection

signal

from

the

interface

circuit

board

and

applies

it

to

the

horizontal

deflection

plates

of

the

CRT.

Input

Amplifier

The

horizontal

signal

from

the

interface

circuit

board

is

connected

to

the

bases

of

Q200

and

Q215.

Under

no-signal

conditions,

the

bases

of

Q200

and

Q215

are

within

150

mV

of

ground.

Resistive

network

R205-R207-R210-R212-R213,

between

the

emitters

of

Q200

and

Q215,

controls

the

emitter

degeneration

of

this

stage.

R212

provides

a

means

of

adjusting

the

emitter

degeneration

of

the

input

amplifier

and

thereby

controls

the

gain

of

the

horizontal

amplifier,

within

±10%.

To

compress

an

off-screen

display

so

that

it

may

be

viewed

on

the

CRT,

the

EAM

FINDER

reduces

the

dynamic

range

of

the

input

amplifier.

This

is

done

by

disconnecting

CR208

in

the

emitter

circuitry

of

Q200-Q215,

and

supplying

a

reduced

current

through

current

setting

resistors

R205,

R208,

and

R213.

Resistors

R202

and

R217

provide

thermal

compensation

for

the

input

amplifier,

while

R222

provides

a

means

of

correcting

for

differential

unbalance

in

the

amplifier

or

CRT.

Output

Amplifier

Transistors

Q240-Q244-Q250

and

Q270-Q274-Q280

are

connected

as

two

separate

current-driven

feedback

amplifiers.

Input

transistor

Q240

(in

the

left

output

amplifier)

is

an

NPN

transistor

for

better

response

to

positive-going

signals,

while

input

transistor

Q270

(in

the

right

output

amplifier)

is

a

PNP

transistor

for

better

negative-going

signal

response.

Negative

feedback

is

provided

from

the

collectors

of

output

transistors

Q244-Q250-Q274-Q280

to

the

base

of

input

transistors

Q240

and

Q270

through

feedback

networks

C242-R242

and

C272-R272.

Variable

capacitors

C242

and

C272

adjust

the

transient

response

of

the

feedback

networks

to

provide

good

linearity

at

fast

sweep

rates.

The

Zener

diode-fast

switching

series

diode,

CR242-VR240

and

CR272-VR270

(across

each

of

the

feedback

networks

in

the

output

amplifier),

turn

on

when

the

sweep

passes

the

right

edge

of

the

CRT.

This

action

stops

the

collectors

of

the

output

transistors

and

shunts

out

the

feedback

networks,

thus

current

limiting

the

output

amplifier.

Capacitors

C240,

C250,

and

C280

are

speed-up

capacitors

to

improve

the

amplifier

response

to

fast

changes.

Diodes

CR246

and

CR274

prevent

Q244

and

Q274

from

going

into

saturation.

VERTICAL

AMPLIFIER

The

vertical

amplifier

provides

the

final

amplification

for

the

vertical

signal

before

it

is

applied

to

the

vertical

deflection

plates

of

the

CRT.

The

vertical

amplifier

circuitry

includes

the

delay

line

and

part

of

the

beam

finder

circuit,

which

reduces

the

final

drive

to

compress

an

over-scanned

display

to

within

the

viewing

area

of

the

CRT.

Del y

Line

Delay

line

DL100

provides

approximately

140

ns

of

delay

for

the

vertical

signal.

This

allows

the

time-base

circuits

time

to

initiate

a

sweep

before

the

vertical

signal

reaches

the

CRT

deflection

plates.

This

delay

of

the

vertical

signal

allows

the

leading

edge

of

the

signal

originating

the

trigger

pulse

to

be

displayed

when

using

internal

triggering.

2-2

Theory

of

Operation

—

D41

The

delay

line

has

a

characteristic

input

impedance

of

about

75

ohms,

or

about

150

ohms

from

side-to-side.

Amplifier

The

vertical

amplifier

consists

of

a

high

bandpass

three-stage

paraphase

amplifier

having

an

input

sensitivity

of

approximately

35

mV/division

and

a

voltage

gain

of

about

115.

The

amplifier

is

differentially

driven

at

the

bases

of

Q100

and

Q125

by

the

input

signal

from

the

delay

line.

R100

and

R125

terminate

the

delay

line.

The

first

amplifier

stage

consists

of

Q100,

Q106,

Q125,

and

Q130.

The

gain

of

this

stage

is

determined

by

the

ratio

of

the

feedback

resistors

R104-R103

or

R128-R129

and

the

emitter

resistor

R111.

The

networks

parallel

to

the

emitter

resistor

compensates

for

the

signal

losses

in

the

delay

line.

R135

acts

as

a

DC

centering

control,

which

compensates

for

resistive

tolerance

errors

and

CRT

electrical

center

error

in

the

vertical

amplifier,

and

allows

the

mainframe

input

to

be

standardized.

The

of

amplification

consists

of

Q148,

Q170,

Q165,

and

Q172.

Thermistor

RT157

resistor

R157

varicap

CR146

and

capacitor

C1

60

between

the

emitters

of

Q148

and

Q165

comprise

a

thermal

compensation

network

to

correct

for

frequency

loss

with

temperature

changes.

The

two

RC

networks

(R151-C156

and

R155-C153-C155)

in

the

emitters

of

Q148

and

Q165,

and

the

RCL

network

in

the

collectors

of

Q148

and

Q165

provide

high

frequency

compensation.

The

final

amplifier

stage

consists

of

Q180,

Q188,

Q182,

and

Q190.

R175

provides

a

means

of

adjusting

the

vertical

amplifier

gain

within

a

±20%

range.

Pushing

the

EAM

FINDER

compresses

an

off-screen

display

to

determine

its

location.

This

is

accomplished

by

turning

off

Q140,

when

the

EAM

FINDER

is

pushed,

which

reduces

the

standing

current

in

the

second

amplifier

stage.

This

lowers

the

voltage

drop

across

R172and

R176,

which

lowers

the

standing

current

in

the

final

amplifier

stage.

The

lower

final

amplifier

stage

standing

current

reduces

the

possible

scan

on

the

CRT.

STORAGE

CIRCUIT

The

cathode-ray

tube

is

a

transmission

halftone

storage

tube.

The

collector

mesh

is

a

coarse

mesh,

which

accelerates

electrons

toward

the

target

area.

The

target

(storage

mesh)

is

a

fine

mesh

with

a

highly

insulative

dielectric

layer

deposited

on

it.

It

is

in

the

dielectric

layer

that

storage

occurs.

The

flood

guns

cover

the

entire

storage

target

with

a

continuous

stream

of

low

velocity

electrons;

these

electrons

are

prevented

from

reaching

the

phosphor

screen

unless

a

display

has

been

written

on

the

storage

mesh.

The

collimation

bands

(electrodes)

are

used

as

a

lens

which

uniformly

distributes

flood-gun

electrons

over

the

storage

target

area.

In

the

non-store

mode,

the

collimation

bands

have

no

control

over

the

CRT.

Switching

from

the

non-store

mode

to

the

store

mode

is

done

by

pushing

in

the

STORE

pushbutton.

When

changing

modes

from

non-storage

to

storage

operation,

an

erase

cycle

is

generated

automatically.

Flood-Gun

Fil ments

The

flood-gun

filament

supply

for

the

CRT

consists

of

VR690-VR691

and

emitter

follower

Q690.

The

power

to

heat

the

filaments

is

derived

from

the

—

20

V

power

supply.

VR690-VR691

sets

the

base

voltage

of

Q690

and

provides

regulation.

Flood-Gun

C thode

The

flood-gun

cathode

is

switched

either

on

or

off

by

switching

transistors

Q675,

Q680

and

Q685.

Two

signals

control

whether

the

flood-gun

cathode

is

turned

on;

they

are:

a.

The

STORE

switch

pushed

in

signal

turns

on

the

flood-gun

cathode.

b.

The

SAVE

pushbutton,

S675,

when

depressed

either

turns

the

flood-gun

cathode

completely

off

(PERSIST

control

fully

clockwise),

or

if

the

PERSIST

control

is

turned

away

from

its

fully

clockwise

position,

allows

the

flood-gun

cathode

to

be

pulsed

at

a

low

duty

factor.

When

the

D41

power

is

turned

off,

in

less

than

a

microsecond

Q700

turns

off.

This

eliminates

the

negative

voltage

that

would

result

from

the

slow

decay

of

the

power

supply

filter

capacitors,

leaving

only

the

positive

voltage

present

at

the

base

of

Q675.

Q675

is

turned

on

causing

Q680

and

Q685

to

be

off.

This

prevents

damage

to

any

stored

information

if

the

save

mode

is

being

utilized,

since

there

is

not

any

flood-gun

cathode

current

available.

Flood-Gun

Anode

The

flood-gun

anode

circuit

consists

of

operational

amplifier

Q670-Q672.

The

operational

amplifier

is

used

as

a

2-3

Theory

of

Operation

—

D41

current-to-voltage

conversion

amplifier.

A

composite

erase

pulse

is

supplied

to

the

base

of

Q670

to

hold

the

flood-gun

anode

high

during

the

erase

cycle.

Collim tion

Electrodes

(CE)

The

CE

1

and

2,

and

the

CE

3

circuits

consist

of

an

emitter

follower,

Q655

and

Q600,

with

base-emitter

reverse

voltage

protection

furnished

by

CR655

or

CR600.

R655,

CE

1

and

R600,

CE

3

adjustments

control

the

voltage

level

of

the

CE

1

and

2,

and

CE

3

respectively.

CE

1

and

2

voltage

varies

between

store

and

non-store

modes

of

operation.

R655,

CE

1

adjustment

sets

the

CE

1

and

2

level

in

the

store

mode,

while

R654

and

VR655

sets

the

CE

1

and

CE

2

level

in

the

non-store

mode.

R655-R657

divider

is

allowed

to

float

in

the

non-store

mode.

Collector

Mesh

Emitter

follower

Q595,

base-emitter

reverse

voltage

protection

diode

CR595

and

Zener

diode

VR595

make

up

the

collector

mesh

circuitry.

VR595

sets

the

base

voltage

for

Q595.

Stor ge

Mesh

Q580,

Q575

and

Q585

form

an

operational

amplifier

that

is

used

as

a

current-to-voltage

conversion

amplifier.

Internal

adjustments,

R572,

Prep

Level,

and

R590,

Op

Level,

set

the

quiescent

operating

levels

for

the

CRT

in

the

storage

mode.

R585,

WRITING

SPEED

control,

allows

a

small

adjustment

to

be

made

in

the

operate

level,

which

increases

the

CRT's

ability

to

store

a

fast

waveform.

During

the

erase

cycle

the

storage

mesh

is

made

a

high

positive

for

50

ms,

returned

to

its

operate

level

for

10

ms,

then

made

a

slightly

positive

level

for

440

ms.

The

two

positive-going

erase

signals

(see

Fig.

2-1)

are

supplied

to

the

storage

mesh

by

the

collectors

of

Q515

(50

ms)

and

Q555

(440

ms).

Er se

Gener tor

Pushing

the

ERASE

pushbutton

creates

a

negative

pulse

at

the

base

of

Q510.

R665-R500-C500

is

a

contact

bounce

remover

network

for

the

ERASE

pushbutton

with

R500

used

to

dampen

any

ringing.

Q510

and

Q515

form

a

50

ms

monostable

multivibrator;

C514

and

R507

are

the

timing

components.

Coupling

capacitor

C528

couples

the

50

ms

multivibrator

to

the

input

of

the

10

ms

monostable

multivibrator

consisting

of

Q530-Q535.

The

timing

components

for

Q530-Q535

are

C534

and

R530.

The

output

from

the

10

ms

multivibrator

is

coupled

to

the

input

of

the

440

ms

monostable

multivibrator

by

C538.

Q550-Q555,

along

with

timing

components

C554

and

R545

form

the

440

ms

monostable

multivibrator.

The

monostable

multivibrators

are

cascaded

to

provide

a

sequential

pulse

train.

Diodes

CR560,

CR562

and

CR564

make

up

an

OR

gate

to

supply

a

composite

erase

signal

to

the

flood-gun

anode

circuit.

The

signal

available

from

the

collector

of

Q550

is

used

to

retrigger

the

erase

generator

when

the

ERASE

pushbutton

is

held

depressed.

V ri ble

Persistence

nd

S ve

Q625

and

Q640

form

a

monostable

multivibrator

that

is

triggered

by

the

output

of

the

10

ms

pulse

generator

consisting

of

programmable

unijunction

transistor

Q610.

The

timing

components

for

the

monostable

multivibrator

are

C625,

R622

and

R620

PERSIST

control.

The

10

ms

pulse

generator

timing

components

are

C610,

R608

and

R609.

Q635

acts

as

a

switch

for

R620

PERSIST

control.

When

S610

STORE

pushbutton

is

pushed

in,

the

10

ms

pulse

generator

feeds

pulses

to

the

storage

mesh

to

increase

the

background

level

slightly

for

better

storage

and

to

the

Q625-Q640

monostable

multivibrator

for

triggering.

Fig.

2-1.

Er se

cycle

w veform

s

seen

t

the

stor ge

mesh-connection

to

the

crt.

2-4

Theory

of

Operation

—

D41

If

S675

SAVE

pushbutton

is

not

pushed

in

(out

position),

then

the

output

of

Q640

(Fig.

2-2)

is

supplied

via

CR640

to

the

storage

mesh.

When

S675

SAVE

pushbutton

is

pushed

in,

then

the

output

of

Q640

(Fig.

2-2)

is

supplied

to

the

flood-gun

cathode.

Pushing

S675

in

forward-biases

CR650

and

holds

pins

16A

and

17A

of

the

time-base

plug-in

high,

preventing

a

sweep.

Fig.

2-2.

V ri ble

Persistence

nd

S ve

circuit

output

w veform.

2-5

Section

3

—

D41

SERVICE

INFORMATION

SPECIFICATIONS

The

electrical

specifications

are

valid

only

if

(1)

the

instrument

has

been

calibrated

at

an

ambient

temperature

between

+20°C

and

+30°C;

(2)

the

instrument

is

operating

at

an

ambient

temperature

between

0°C

and

+50°C,

unless

otherwise

noted;

(3)

each

plug-in

must

be

operating

(fully

installed)

in

a

calibrated

system.

Unless

otherwise

stated,

specification

are

referenced

to

the

plug-in

connectors

of

the

5403.

Any

conditions

that

are

unique

to

a

particular

specification

are

stated

as

part

of

that

specification.

TABLE

3-1

5403-D41

Vertic l

Amplifier

Ch r cteristics

Perform nce

Requirements

Supplement l

Inform tion

Input

Signal

Amplitude

(Differential)

50

mV/division

±2%.

Less

than

0.5%

difference

between

left

and

right

verti



cal

plug-in

compartments.

andwidth

(6-Division

Reference)

D

C

to

at

least

90

MHz

with

a

067-0680-00

Calibration

Fixture.

D

C

to

at

least

60

MHz

with

a

calibrated

5A48.

Risetime

(6-Division

Reference)

3.9

ns

or

less

with

a

067-0680-00

Cali



bration

Fixture.

5.8

ns

or

less

with

a

calibrated

5A48.

Aberrations

(6-Division

Reference)

6%

or

less

measured

with

a

067-0680-00

Calibration

Fixture.

3%

or

less

measured

with

a

calibrated

5A48.

Position

Effect

on

Aberrations

(6-

Division

Reference

with

a

067-

0680-00

Calibration

Fixture.

Front

corner

aberrations

of

+step

or

—

step

response

signal

should

not

ex



ceed

±6%

when

the

waveform

is

posi



tioned

not

more

than

1

division

beyond

graticule

center.

Vertical

Centering

Within

±0.5

division

of

graticule

center.

Delay

Line

Length 140

ns

Modes

Chop

and

alt.

Rate

Chop

50

kHz

+50%

—

30%;

3

µs

on,

2

µs

off.

Alt

Once

every

two

sweeps.

TABLE

3-2

5403-D41

Horizont l

Amplifier

Ch r cteristics

Perform nce

Requirements

Supplement l

Inform tion

andwidth

DC

to

at

least

2

MHz

.

Eight

division

signal

used

as

a

refer



ence.

Horizontal

Centering

X-Y

Operation

Less

than

2°

phase

shift

from

DC

to

at

least

20

kHz.

Within

0.5

division

of

graticule

center.

REV.

,

MAR.

1977

3-1

Service

Information

—

D41

TA LE

3-3

D41

Z-Axis

Amplifier

Characteristics

Performance

Requirements

Supplemental

Information

External

Input

Voltage

+5

V

turns

CRT

beam

on

from

off

condition

—

5

V

turns

CRT

beam

off

from

on

con



dition

Usable

Frequency

Range

DC

to

2

MHz

Input

Impedance

Resistance:

10

k

Capacitance:

40

pF

Maximum

Safe

Input

50

V

(DC

+

Peak

AC)

TA LE

3-4

D41

Cathode-Ray

Tube

Characteristics

Performance

Requirements

Supplemental

Information

Geometry

owing

or

tilt

<

0.1

division

Orthogonality

90°

±0.7°

Stored

Writing

Rate

5

div/µs

at

15

second

viewing

time

1

div/µs

at

60

second

viewing

time

Phosphor

P31

standard

Deflection

Electrostatic

Acceleration

Potential

8.5

kV

TA LE

3-5

5403-D41

Power

Supply

and

Calibrator

Characteristics

Performance

Requirements

Supplemental

Information

Power

Line

Input

Line

Voltage

(RMS)

Nominal

100

V,

110

V,

120

V,

200

V,

220

V,

240

V

±10%

Line

Frequency

50

to

400

Hz

Input

Power

100

W

maximum

at

120

VAC,

60

Hz

Fuse

Data

1.25

A

slow

blow

(120

VAC)

0.7

A

slow

blow

(240

VAC)

Calibrator

Voltage

400

mV,

±1%

Current

4

mA,

±1%

Frequency

Twice

the

power

line

frequency

3-2

REV.

B,

MAR.

1977

Tektronix 5441 User manual

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