Tektronix 585 User manual

Table of contents

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INSTRUCTION

MANUAL

NOTICE

This

oscilloscope

has

been

improved

over

in



struments

manufactured

before

Serial

No.

2585.

The

improvements

are

within

the

ertical

Ampli



fier

system

and

are

required

by

the

user

of

plug



in

units

with

type

numbers

above

Type

80.

The

improvements

can

be

put

into

any

instrument

before

Serial

No.

2585

by

ordering

Tektronix

Field

Modification

No.

040-275.

See

your

local

Tektronix

Field

Engineer

for

details

and

avail



ability.

Tektronix,

Inc.

S.W.

Millikan

Way

•

P.

O.

Box

500

•

Beaverton,

Oregon

•

Phone

Ml

-0161

•

Cables:

Tektronix

Tektronix

International

A.G.

Terrassenweg

1A

•

Zug,

Switzerland

•

PH.

0 2- 9192

•

Cable:

Tekintag,

Zug

Switzerland

•

Telex

53.57

070-171

WARRANTY

All

Tektronix

instruments

are

warranted

against

defective

materials

and

workman



ship

for

one

year.

Tektronix

transformers,

manufactured

in

our

own

plant,

are

war



ranted

for

the

life

of

the

instrument.

Any

questions

with

respect

to

the

war



ranty

mentioned

above

should

be

taken

up

with

your

Tektronix

Field

Engineer.

Tektronix

repair

and

replacement-part

service

is

geared

directly

to

the

field,

there



fore

all

requests

for

repairs

and

replace



ment

parts

should

be

directed

to

the

Tek



tronix

Field

Office

or

Representative

in

your

area.

This

procedure

will

assure

you

the

fastest

possible

service.

Please

include

the

instrument

Type

and

Serial

number

with

all

requests

for

parts

or

service.

Specifications

and

price

change

priv



ileges

reserved.

Copyright

©

1959.

New

material

copy



right©

1962

by

Tektronix,

Inc.,

Beaverton,

Oregon.

Printed

in

the

United

States

of

America.

All

rights

reserved.

Contents

of

this

publication

may

not

be

reproduced

in

any

form

without

permission

of

the

copy



right

owner.

Warranty

Section

1

Characteristics

Section

2

Operating

Instructions

Section

3

Applications

Section

4

Circuit

Description

Section

5

Maintenance

Section

6

Calibration

Procedure

Section

7

Accessories

Section

8

Parts

List

and

Schematics

CONTENTS

SECTION

1

CHARACTERISTICS

General

The

Tektronix

Type

585

Oscilloscope

is

a

wide

range,

general

purpose

laboratory

instrument

which

provides

accurate

measurements

in

the

d

c

to

approximately

95

mega



cycle

range.

Plug-in

amplifiers

are

used

in

the

vertical

de



flection

system,

permitting

the

instrument

to

be

used

in

many

specialized

applications.

Any

of

the

Tektronix

Eighty

Series

Plug-In

Units

can

be

used

with

the

oscilloscope

to

satisfy

many

types

of

wide-band

uses.

Use

of

the

Type

81

Plug-In

Adapter

permits

use

of

any

of

the

Tektronix

letter

series

plug-ins

for

applications

involving,

among

others,

dual

trace

operation,

low

level

signals,

differential

signals,

pulse

sampling,

and

transistor

risetime

checking.

High

calibrated

sweep

rates

allow

full

use

of

the

rise-time

capabilities

of

the

instrument.

Special

circuits

incorporated

in

the

Type

585

Oscilloscope

allow

accurate,

continuously

variable

delay

in

the

pre



sentation

of

a

sweep

from

1

microsecond

to

10

seconds

after

the

receipt

of

a

triggering

impulse.

The

delayed

sweep

feature

permits

highly

magnified

displays

of

a

small

portion

of

an

undelayed

sweep;

accurate

measurements

of

wave



form

time

jitter;

precise

time

measurements,

as

well

as

many

other

uses.

VERTICAL

DEFLECTION

SYSTEM

Characteristics

for

the

vertical

deflection

system

of

the

Type

585

Oscilloscope

depend

upon

the

plug-in

unit

and

probe

used

with

the

instrument.

The

following

character-

3.7

nanoseconds

Fig.

1-1.

Vertical

risetime

of

the

Type

585

Oscilloscope

and

Type

80

Plug-In

combination.

Bandpass

1

Risetime

2

erical

Deflection

Factor

Input

Characteristics

DC

to

approximately

95

megacycles

Better

than

3.9

nsec,

10%

to

90%,

nominal



ly

3.7

nsec.

0.1

volts

per

centime



ter.

A

function

of

the

indiv



idual

plug-in

or

probe

used.

HORIZONTAL

DEFLECTION

SYSTEM

Sweep

Rates

Time

Base

A

0.05

microseconds

(50

nsec)

to

2

seconds

per

centimeter

in

24

accurately

calibrated

steps.

An

uncalibrated

control

permits

sweep

rates

to

be

varied

continuously

between

50

nsec

and

approximately

5

seconds

per

centimeter.

Calibrated

sweep

rates

are

typically

within

2%

and

in

all

cases

within

3%,

of

the

indicated

rate.

Time

Base

B

2

microseconds

to

1

second

per

centimeter

in

18

accurately

calibrated

steps.

All

sweep

rates

are

typically

within

1

%,

with

the

.2,

.5,

and

1

second

per

centimeter

ranges

within

3%

of

the

indicated

rates.

Magnifier

Provides

a

5

times

horizontal

expansion

of

the

center

2-

centimeter

portion

of

the

oscilloscope

display.

It

extends

the

fastest

Time

Base

A

sweep

rate

to

10

nsec

per

centi



meter

with

a

typical

1

%

linearity.

Triggering

Modes

Time

Base

A

and

B

External,

Internal,

and

Line.

Triggering

SLOPE

and

LE EL

are

adjustable.

1-1

istics

are

given

for

the

Type

585

when

used

with

a

Type

80

Plu

g

-ln

Unit

and

a

Type

P80

Probe.

Characteristics

—

Type

585

Triggering

Signal

Requirements

Time

Base

A

Internal

—

a

signal

producing

4

mm

of

vertical

deflection

from

15

cps

to

10

m

c

.

a

signal

producing

1.5

cm

of

vertical

deflection

from

10

to

30

m

c

.

a

signal

producing

2.5

cm

of

vertical

deflection

from

30

to

50

m

c

.

a

signal

producing

4.0

cm

of

vertical

deflection

from

50

to

100

m

c

.

NOTE

See

page

2-9

for

operating

instructions

to

syn



chronize

the

A

sweep

with

signals

of

less

than

4.0

cm

amplitude

from

50

m

c

through

150

m

c

.

External

—

a

signal

of

0.2

volts

to

30

volts

peak-to-peak.

(The

A

sweep

will

trigger

on

larger

signals,

but

the

TRIG



GERING

LE EL

control

operates

only

over

a

—

15

volt

to

+

15

volt

range.)

Time

Base

B

Internal

—

4

mm

of

c

rt

display

through

500

kc,

increasing

to

2

cm

ert

display

at

4

megacycles.

External

—

AC

or

DC:

a

signal

of

±0.4

volts

through

500

kc,

increasing

to

1

volt

at

1

m

c

,

and

2.5

volts

at

2

m

c

.

External-Horizontal

Signal

Input

Deflection

Factor

—

approximately

0.2

to

15

volts

per

centi



meter,

continuously

variable.

Frequency

Response

—

depends

on

the

amount

of

deflection.

The

product

of

frequency

response

and

deflection

in

centi



meters

is

approximately

4.8

megacycle

centimeters.

Input

Characteristics

—

1

megohm

paralleled

by

approximate



ly

50

pf.

Delayed

Sweep

Sweep

delay

continuously

variable

from

1

microsecond

to

10

seconds.

Actual

delay

steps

within

1%

of

indicated

delay

from

2



sec/cm

to

0.1

sec/cm;

0.2

sec/cm

to

1

sec/

cm

typically

within

1%

but

never

more

than

3%.

Incre



mental

delay

accuracy

is

within

0.2%.

Jitter

—

not

more

than

1

part

in

20,000.

1-2

Characteristics

—

Type

585

OTHER

CHARACTERISTICS

Cathode-Ray

Tube

Type

—

T581P31;

P

1

,

P2,

P7,

and

P

11

phosphors

optional.

Other

phosphors

available

on

special

order.

Unblanking

—

DC

coupled.

Accelerating

potential

—

10,000

volts.

Deflection

system

—

electrostatic.

Beam

deflected

vertically

by

6

pairs

of

distributed

deflection

plates.

Beam

deflected

horizontally

by

1

pair

of

deflection

plates.

Usable

viewing

area

—

4

centimeters

by

10

centimeters.

ertical

Deflection

Factor

—

4.6

to

5.6

volts

per

centimeter.

Horizontal

Deflection

Factor

—

18

to

21

volts

per

centimeter.

Graticule

Illumination

—

variable

edge

lighting.

Markings

—

marked

in

4

vertical

and

10

horizontal

1

-centi



meter

divisions

with

2-millimeter

markings

on

the

center



lines.

Amplitude

Calibrator

Waveform

—

square-waves

at

approximately

1

kc.

Output

voltage

—

0.2

millivolts

peak-to-peak

to

100

volts

peak-to-peak

in

18

steps.

Accuracy

—

peak-to-peak

amplitude

of

square-waves

within

3%

of

indicated

voltage.

Output

Loading

—

33

k

load

will

reduce

100

volts

output

2%.

500

k

load

will

reduce

50

volt

output

2%.

100

k

load

will

effect

voltages

1

volt

or

below.

Power

Supplies

Electronically

regulated

for

stable

operation

with

widely

varying

line

voltages

and

loads.

Line

voltage

requirements

—

105

to

125

volts,

or

210

to

250

volts.

Power

—

approximately

630

watts.

Line

frequency

—

50

to

60

cycles.

Output

Waveforms

Available

Positive

Gate

A

—

approximately

30

volts

peak-to-peak

with

same

duration

as

A

sweep.

Approximately

200

ohms

output

impedance.

Positive

Gate

B

—

approximately

30

volts

peak-to-peak

with

same

duration

as

B

sweep.

Approximately

300

ohms

output

impedance.

Delayed

Trigger

pulse

—

approximately

5

volts

in

amplitude,

occuring

at

end

of

the

delay

period.

Sawtooth

A

—

sweep

A

sawtooth

waveform,

approximately

150

volts

peak-to-peak.

Maximum

allowable

load,

18

k.

MECHANICAL

SPECIFICATIONS

Ventilation

Forced

filtered

air.

Thermal

relay

interrupts

instrument

power

in

the

event

of

overheating.

Will

operate

satisfactorily

up

to

approximately

120°

F

ambient

air

temperature.

Construction

Aluminum-alloy

chassis

and

three-piece

cabinet.

Photo-etched

anodized

panel,

blue

vinyl

covered

textured

aluminum.

Dimensions

—

see

Figure

1-3.

Weight

—

74

pounds.

Fig.

1-3.

Type

585

Oscilloscope

dimensions.

Accessories

Included:

2

Binding-post

adapters

(013-004)

1

Test

lead

(012-031)

1

Green

Filter

(378-514)

1

Power

cord

(161-010)

1

Adapter,

3

wire

to

2

wire

(103-013)

2

Instruction

Manuals

1-3

NOTES

SECTIOIXI

2

OPERATING

INSTRUCTIONS

General

Information

The

Type

585

Oscilloscope

is

an

extremely

versatile

instrument

which

is

adaptable

to

a

great

number

of

applica



tions.

However,

to

make

use

of

the

full

potentialities

of

the

instrument,

it

is

necessary

that

you

understand

completely

the

operation

of

each

control.

This

portion

of

the

manual

is

intended

to

provide

you

with

the

basic

information

you

require.

PRELIMINARY

INSTRUCTIONS

Cooling

A

fan

maintains

safe

operating

temperature

in

the

Type

585

by

circulating

filtered

air

over

the

rectifiers

and

other

components.

When

in

operation,

the

instrument

must

be

placed

so

that

the

air

intake

at

the

back

is

clear

of

any

obstruction

that

might

impede

the

flow

of

air.

Side

panels

should

also

be

in

place

for

proper

air

circulation.

The

air

filter

should

be

kept

clean

in

accordance

with

cleaning

instructions

found

in

the

Maintenance

Section

of

this

Manual.

Under

no

circumstances

should

your

Type

585

oscilloscope

be

operated

without

the

fan

running.

Without

the

fan,

inside

temperature

of

the

oscilloscope

will

rise

to

a

dangerous

level

in

five

to

ten

minutes.

In

this

event,

the

thermal

cutout

switch

will

disconnect

the

power

and

keep

it

disconnected

until

the

temperature

drops

to

a

safe

level.

Power

Requirements

Unless

tagged

otherwise,

this

instrument

is

connected

at

the

factory

for

operation

at

105

to

125

volts,

50

to

60

cycles

AC

(117

volts

nominal.)

However,

provisions

are

made

for

easy

conversion

to

operate

at

210

to

250

volts,

50

to

60

cycles

(234

volts

nominal).

The

power

transformer

has

eight

primary

terminals

making

possible

operation

from

six

different

input

voltages.

The

Type

585

can

be

operated

from

primary

voltages

of

110,

117,

124,

220,

234

and

248

volts,

50

or

60

cycles.

Figure

2-1

illustrates

proper

connections

to

permit

operation

on

any

one

of

the

listed

voltages.

Fan

Connections

When

connecting

the

power

transformer

for

operation

with

a

supply

voltage

of

200

volts

or

more,

be

sure

to

leave

the

fan

wires

connected

at

terminals

1

and

3

of

the

primary.

This

is

to

insure

that

the

fan

motor

will

not

be

supplied

more

than

125

volts.

Figure

2-2

shows

a

typical

high

line

voltage

connection

assuring

proper

fan

operation

when

the

line

voltage

is

248

volts.

Fig.

2-1.

The

power

transformer

has

two

extra

windings

permitting

nominal

primary

voltages

of

1

10,

1

17,

12 ,

220,

23 ,

2 8

volts,

50

or

60

cycle

operation.

2-1

Operating

Instructions

—

Type

585

Fuse

Data

Fuse

data

is

silk-screened

on

the

rear

panel

of

the

instru



ment

adjacent

to

the

fuse

holder.

Use

only

the

recom



mended

fuses

for

maximum

over-current

protection.

proper

contact.

Tighten

the

plug-in

unit

locking

control

to

hold

the

unit

securely

in

place

and

turn

the

oscilloscope

INTENSITY

control

fully

counterclockwise.

Connect

the

power

cord

to

the

rear

of

the

instrument

and

to

the

power

line

and

place

the

POWER

switch

in

the

ON

position.

OSCILLOSCOPE

OPERATING

INFORMATION

If

you

are

familiar

with

other

Tektronix

Oscilloscopes,

you

should

have

very

little

difficulty

in

understanding

the

opera



tion

of

the

Type

585.

The

function

of

many

controls

is

the

same

as

the

function

of

corresponding

controls

on

other

Tektronix

instruments.

Plug-In

Units

The

Type

585

Oscilloscope

is

designed

to

operate

with

the

Tektronix

Eighty

Series

Plug-In

Units.

In

addition,

the

Type

81

Plug-In

Adapter

permits

use

of

all

of

the

Tektronix

Letter-Series

plug-in

units.

The

particular

plug-in

unit

used

must

be

selected

to

satisfy

the

application

requirements.

In

selecting

the

plug-in

unit

for

any

particular

application,

consider

the

bandpass,

sensitivity,

the

type

of

input

required

for

that

application.

The

plug-in

units

now

available

and

those

presently

under

development

will

satisfy

the

require



ments

for

most

applications.

Preparation

for

Use

When

the

plug-in

unit

to

be

used

has

been

selected,

insert

the

unit

into

the

plug-in

compartment

of

the

Type

585

oscillo



scope

and

press

firmly

to

insure

that

the

connectors

make

Fig.

2-2.

A

typical

high-voltage

fan

connection,

using

as

an

example

the

wiring

for

a

2 8-volt

supply.

Time

Delay

A

time

delay

relay

used

in

the

Type

585

Oscilloscope

delays

operation

of

the

instrument

for

approximately

25

seconds

after

the

POWER

switch

is

turned

on

to

allow

a

brief

tube

warmup

period.

The

delay

allows

the

tubes

sufficient

time

to

heat

before

the

d

c

operating

voltages

are

applied.

If

the

ac

power

is

off

for

only

an

instant,

the

normal

25

second

delay

will

occur

before

the

instrument

returns

to

full

operation.

This

delay

will

occur

regardless

of

whether

the

ac

power

is

off

because

of

momentary

power

failure

or

is

turned

off

with

the

POWER

switch.

INTENSITY

Control

The

INTENSITY

control

is

used

to

adjust

the

brightness

of

the

oscilloscope

display.

This

permits

compensation

for

changes

in

brightness

resulting

from

changes

in

the

sweep

or

triggering

rate.

The

INTENSITY

control

is

rotated

clock



wise

to

increase

brightness

and

counterclockwise

to

decrease

brightness.

Care

must

be

taken

when

using

the

INTENSITY

control

that

the

brightness

is

not

turned

up

to

the

point

where

the

face

of

the

cathode-ray

tube

is

permanently

damaged.

If

the

intensity

of

the

beam

is

turned

up

too

far,

the

phosphor

on

the

face

of

the

c

rt

may

be

burned.

FOCUS

and

ASTIGMATISM

Controls

The

FOCUS

and

ASTIGMATISM

controls

operate

together

to

allow

a

sharp,

clearly

defined,

spot

or

trace

to

be

ob



tained.

FOCUS

adjustments

need

to

be

made

after

each

change

of

the

INTENSITY

control.

For

slow

sweep

rates,

proper

adjustment

of

the

ASTIGMATISM

control

will

produce

a

circular

spot,

then

adjust

the

FOCUS

control

for

as

small

a

spot

as

possible.

For

fast

sweep

rates

with

low

repetition

rates

that

produce

a

dim

trace,

best

focus

can

be

obtained

by

looking

at

the

waveform

and

simultaneously

adjusting

the

ASTIGMATISM

and

the

FOCUS

control.

There

is

a

maxi



mum

setting

of

the

INTENSITY

control

above

which

a

good

focus

is

not

possible.

Best

definition

for

all

signals

will

be

obtained

by

using

the

horizontal

center

six

centimeters

of

the

graticule.

Graticule

and

Scale

Illumination

Control

The

graticule

used

with

the

Type

585

Oscilloscope

is

accurately

marked

with

10

horizontal

and

4

vertical

1-

centimeter

divisions

with

2-millimeter

markings

on

the

center



lines.

These

graticule

markings

in

conjunction

with

the

cali



brated

scale

factors

of

the

Type

585

allow

time

and

voltage

measurements

to

be

made

directly

from

the

oscilloscope

crt.

The

graticule

is

illuminated

by

two

lamps

located

at

the

top

edge

of

the

graticule.

This

illumination

can

be

con



trolled

so

that

the

graticule

markings

appear

either

red

or

2-2

A

A