Iwatsu SS-7821/11, SS-7810/06 Operation Manual

Operation

Manual

Oscilloscope

SS-7821/11

SS-7810/06

IWATSU

Introduction

O Thank you

very

much

for your

purchase

of

Iwatsu

electronic

measuring

instruments.

We

appreciate

your

continued

patronage

of Iwatsu

electronic

measuring

instruments.

O Please use

your

instrument

after

thoroughly

reading

this

instruction

manual

and

understanding

its

contents.

After reading

this

manual, please

keep it

in a

safe place

for

future

reference.

Cautions

for

safe use

Matters

that must

be

observed

for safe

operation

of this

instrument

and for

prevention

of

injury to

humans

and damage

to

property

are described

as

“^warnings”

and

“/K

cautions”

in

this

instruction

manual.

The

symbol to

invoke

caution is

marked on

the panel.

Explanation

of

“^warnings”

and

“/j\

cautions”

columns

in this

instruction

manual

/i\

Warning

Incorrect

operation or

failure to

need

warnings may

result in death or

serious

injury.

/i\

Caution

Incorrect

operation

or failure to

need

cautions may

result in

injury or

damage

to

equipment.

Explanation

of

the

symbols on

the

panel

Warning

symbol

This a

symbol

used

in

reference with

the statements

in the

instruction

manual to

protect

human

against injury and

protect

this

instrument

against damage.

Cautions

O

Parts

of the

contents

of this

instruction manual

may be

modified without

notice

to

accommodate

improvements

in

performance and

function.

O Reproduction

of

the

contents of

this

instruction manual

without previous

consent is

prohibited.

History

O Nov.

1994: Issue

of the 1st

edition

O May.

1998: Issue

of the

5th edition

KML007141

F7401-216501(B)

Be

sure to

read

this

page

to

assure

safety.

Read

the

next

page also.

Warnings

#Do

not

use

this

instrument

in

a

iocation

where

there

is

expiosive

gas

in

the

vicinity.

The

use of

this

instrument

in

a

location

where

there

is

explosive

gas

could

result

In

explosion.

#lf

there

is

any

smoke,

abnormal

odor,

or

abnormal

sound

coming

display

type

this

instrument,

immediately

set

the

power

switch

to

STBY

and

disconnect

the

power

cord.

Use of this

instrument

under

these

conditions

could

result In

electrical

shock

or

fire.

After

setting

the

power

switch

to STBY

and

disconnecting

the

power

cord,

contact

one

of our

service

offices

for

repair.

Repair

by

the

user

is

dangerous

and

should

be strictly

avoided.

#Take

care

to

not

allow

water

to

get

into

this

instrument

or

the

wetting

of

this

instrument.

The

use of

this

instrument

in

a

wet

state

could

result

In

electrical

shock

or fire.

If

water

or other

foreign

matter

has

gotten

into

this

instrument,

first

set the

power

switch

to

STBY

and remove

the

power

cord

and

then

contact

one

of

our

service

offices

for

repair.

#Do

not

place

this

instrument

on

an

unstable

place

such

as on

a shaky

stand

or

on

a

slant.

The

dropping

or turning

over

of this

instrument

could

result

in

electrical

shock,

injury,

or

fire. If

this

instrument

has

dropped

or its

cover

has

been

damaged,

first

set the

power

switch

to STBY

and

remove

the

power

cord

and

then

contact

one

of our

sen/ice

offices

for

repair.

#Do not

allow

any

foreign

matter

such

as

metal

or

inflammable

substance

to

get in

from

the

air

hole,

etc.

The

entrance

of

any

foreign

matter

display

type

the

ventilation

port,

etc.,

could

result in

fire,

electrical

shock,

or

power

failure.

If

any

foreign

matter

has

entered,

first

set the

power

switch

to

STBY

and

remove

the

power

cord

and

then

contact

one

of our

service

offices

for

repair.

-II-

Be sure

to

read

this

page to assure

safety. Read

the next

page also.

/1\

Warnings

(cont’d)

#

Be

sure

to use

a 3-core

power

cord.

Failure

to use

a 3-core

power cord

could

result

in

electrical

shock

or power

failure.

•

When

supplying

power

display

type

a 2-wire

receptacle

using

a

3-core/2-core

conversion

adapter,

be sure

to connect

the

grounding

terminal

of

the

3-core/2-

core conversion

adapter

to ground.

•

When

supplying

power display

type a 3-wire

receptacle

using

the

attached

3-

core power

cord, the

grounding

wire of

the

power cord

is

connected

to ground.

#Use

this

instrument

with

the

rated

AC

power

supply.

Use of this

instrument

with

a voltage other

than

specified

could

result in

electrical

shock,

fire, or

power failure.

The

usable power

voltage

range

(90

to 132 VAC

or

180 to 250 VAC)

is marked

on the

rear

panel.

#

Be sure

to connect

the ground

side

of

probes

and

input connectors

to the

grounding

potential

of the

object being

measured.

If the grounding

lead

is connected

to

potential

other

than

the

ground,

electrical

shock or

other accidents

(damages

to the

object being

measured,

the

instrument

itself or

other units

connected

to the instrument)

may

occur

(refer

to the

“Example

of improper

configuration”

shown

below).

[Example of improper

configuration]

The chassis assumes

a

voltage of 100 V and is dangerous.

+100

and chassis short circuit.

lead

When

measuring

the floating

potential,

measurement

by the

differential

method

(CHI and

CH2 input) is

recommended

(refer

to the

example

shown

below).

[Example of

recommended

measurement

method]

Main body

-III

Be sure

to read

this

page

to

assure safety. Read

the next

page also.

/K

Warnings

#

Do

not

remove

either the

cover or

panel.

There are

high-voltage

parts inside

the cover and

panel and

touching any

of them

could

result in

electrical shock.

Please contact

one of our service

offices

for any

inspection,

calibration,

or repair.

#Take

sufficient

care

when

measuring

high

voltages.

Touching a

high-voltage part during

measurement could

result in electrical

shock.

#When

carrying this

instrument with a shoulder

bag,

use only

an appropriate bag.

If an

inappropriate

shoulder bag

is

used,

the

instrument may drop and cause

injury.

If

there are any

questions

concerning the safety

of

a

shoulder

bag,

such as

broken seams or

weakened straps, do

not

use

the bag.

#When

handling the power

cord,

strictly observe

the

following:

Failure to

heed this

Inspection

could result in fire or

electrical shock. If the power

cord

has been damaged,

contact

one of our service offices (at

the end of this

volume)

for repair,

•

Do

not modify the

power

cord.

•

Do not pull the power cord.

•

Do

not bend the

power cord

forcibly.

•

Do

not heat the power cord.

•

Do not

twist the

power cord.

•

Do not

moisten the power cord.

•

Do

not bundle the

power cord.

•

Do not place

a

heavy object

on

the

power cord.

#Do not

modify

this instrument.

Modification of this

instrument

could

result

in electrical shock, fire, or power

failure. Repair

of

a

modified

instrument may

be

refused.

-IV-

Be

sure to

read

this page

to

assure

safety.

Read the

next page

also.

A\

Cautions

#

Be

sure to

use a

specified

fuse

(<j>5

x 20 mm, 250

V, 2A, SLOW)

when

replacing

the

fuse.

The use

of a

fuse

other

than a

specified

one could

result in fire or

power

failure.

Disconnect

the

power

cord

when

replacing

the fuse.

#

Be

sure to

use a

three-core

power

cord suitable

for the supply

voltage.

The

use

of

a

cord that

is not

suitable

for the supply

voltage may cause

fire.

Also,

the

use

of a

two-core

power

cord may cause

electrical

shock.

#

Be

sure to

connect

and

disconnect

the

power cord after setting

the power

switch to

STBY.

Connection

and

disconnection

of

the

power cord with power

supplied could

result

in

electrical

shock

or

power

failure.

#

When

disconnecting

the

power

cord

display type the

receptacle,

pull it

by

holding

the

plug.

Pulling by

the

cord may

damage the

cord

and could

result in fire or electrical

shock.

#

Avoid use

of

any

damaged

cable or

adapter.

The use

of

any

damaged

cable

or adapter could

result in fire

or electrical

shock.

#

Avoid

placing

any

object

on this

instrument.

If any

object

is

placed

on

this

instrument,

the cover may

contact the

internal

circuity

and

could result

in

electrical

shock, fire,

or power failure.

#

Do not

place

any

object

in the

vicinity of the

air hole or fan

of this

instrument.

Placing

any

object

in

the

vicinity

of the

air hole or fan may

generate internal heat

and

could

result

in fire or

electrical

shock.

#

Do

not

place

this

instrument

in a

location

with

a

high

degree of moisture

or

dust.

Placing

this

instrument

in a

location

with

a

high degree of

moisture or

dust

could

result

in

fire or

electrical

shock.

#

When

using

this

instrument

in

an upright

position, take

care

not to

allow it

fall

over.

The

falling

over of this

instrument

could result

in injury, fire, or electrical

shock.

#

When

probes

or measuring

cables, etc.

are connected to

this instrument,

take

care not to

cause

this

instrument

to

fall over

by

pulling them.

The

falling

over of

this

instrument

could

result in injury, fire,

or electrical shock.

#

Do

not use

this

instrument

if it has

failed.

The use

of this

instrument in a

state

of failure

could result in fire or electrical

shock.

In

the case

of failure,

contact

one of our

service offices for repair.

-

V-

Be sure to

read

this page to

assure

safety.

/?\

Cautions

#

Always use

this

instrument

only

within the rated

operating

range.

The use

of this

instruction out

of the rated

operating range

could result in power

failure. The

temperature

and

humidity ranges

that allow the use

of this

instrument

are as

follows:

Operation

: Indoor use

only

Temperature

; 0°Cto+40“C

Relative

humidity : 90%

or less (at O'C to +40“C)

#

Do

not apply

voltage

to an input

terminal exceeding

the posted rating.

Applying

a

voltage

exceeding

the

posted

rating

could result in power

failure. The

maximum voltage

than can be

applied is as

follows:

•

SS-7821

Direct

:

±400 V

(DC+ACpeak)

With probes

equivalent

to

SS-082R

(10:1)

: ±600

V

(DC+ACpeak)

•

SS-78

11/7810/06

Direct

:

±400 V (DC+ACpeak)

With

probes

equivalent to

SS-0130R

(10:1)

: ±600

V (DC+ACpeak)

[Note]

The

maximum input

voltage derates

depending on frequency and high

voltage

pulse

of an Input signal.

#

Do

not raise trace

or

character intensity

beyond what is necessary.

The

use

of

an Intensity

beyond what is

necessary could result in eye fatigue or

burn in of the

CRT.

#

Leave

space

side

and

rear.

When using this

instrument

in

a

cabinet or

putting on the other instruments, the

scope

may overheat,

it could result

failure of operation and

specifications,

contact

our Service

Office.

#

To

assure safety, be

sure to

disconnect the power cord if the instrument is

not to be used

for a

long period.

#

When

transporting

this

instrument,

be

sure to use the original packing

material that came

with the

instrument or

other

packing material that is

equal or

superior.

Large vibrations

and/or

shocks applied to

the instrument during transpiration

could result in

power failure and

fire. If there is no

appropriate

packing material

and/or

cushion

material, consult

one of our service offices.

When using

a

carrier,

label “precision machine”

on

each face of

the

packing box.

-VI-

Contents

Cautions

for safe

use

Warnings

Cautions

Unpacking

Components

Replacement

of

built-in

battery

Section

1 .

Controls,

Connectors

and

Indicators

1.1

Front

Panel

1 .2

RearPanel

3

Section

2.

Basic

Operation

4

2.1

Displaying

CAL

signal

with

AUTO

SET

6

2.2

Probe

Compensation

T

2.3

Display

Adjustment

8

2.4

Vertical

and

Horizontal

Positioning

9

2.5

Vertical

Deflection

System

9

2.5.1

Deflection

Factor

9

2.5.2

Input

Coupling

10

2.5.3

Display

Channels

1

1

2.5.4

ALT

and

CHOP

11

2.5.5

Sum

(ADD)

and

Difference

(IN

V)

12

2.5.6

Bandwidth

Limiter

12

2.6

Sweep

Rate

and

Magnification

13

2.6.1

Sweep

Rate

13

2.6.2

Magnification

2.7

Sweep

Mode

2.7.1

Repetitive

Sweep

2.7.2

Single

Sweep

2.8

Triggering

2.8.1

Trigger

Source

15

2.8.2

Trigger

Coupling

15

2.8.3

Trigger Slope

16

2.8.4

Trigger

Level

16

2.8.5

TV

Signal

17

2.9

Horizontal

Display

18

2.10

Trace

Separation

19

2.11

Delayed

Sweep

20

2.11.1

Continuous

Delay

20

2.11.2

Triggered

Delay

21

2.12

Holdoff

22

-VII-

Section

3.

Cursor

Measurement

and

Counter

23

3.1

Time

Difference

(At)

and

Frequency

(1/At)

23

3.2

Voltage

Difference

(AV)

25

3.3

Counter

26

Section

4.

Save/Recall

27

4.1

Save

27

4.2

Recall

27

Section

5.

Daily

Inspection

28

Sections.

Specifications

21

SS-500/501/502/505(CH2

0UT,

ZAXISIN)

36

Probe

SS-082R

37

Probe

SS-01

30R/01

31 R

38

-VIII-

Unpacking

The figure

below depicts

the unpacking

procedure.

•

SS-7821/7811/7810/06

1

•

Accessories

Power cord (three-core type)

1

Probe

(10:1)

2

For SS-7821

: SS-082R

For SS-781

1/10/06

:

SS-0130R

Front cover

1

Fuse

2

Instruction

manual 1

Replacement

of built-in battery

•

The built-in battery is not

commercially available. Please

contact

your

nearest

sales

representative to obtain a

replacement.

•

If the battery

is exhausted, the setup

conditions

are initialized

when

the

power is

turned

on.

-IX-

Memo

Section

1

.

Controls,

Connectors and Indicators

1.1

Fronipanel

See

Figure

1.1.1.

Figure

1.1.1 Front

Panel

I

0

Adjustment

of the

power source

and

screen

i

POWER

I

: Used to

set

the AC

power

source

to

ON/STBY.

[INTEN] :

Adjusts

the

intensity of traces

(refer to

"2.3

Display Adjustment").

[READOUT]

: Adjusts

the

intensity

of characters

(refer to

"2.3

Display Adjustment").

[FOCUS]

: Adjusts

the

focus

(refer

to

"2.3

Display

Adjustment").

[SCALE]

: Adjusts

the

intensity

of the scale

(refer to

"2.3

Display Adjustment").

[TRACE

ROTATION]

:

Adjusts

the

rotation of traces

(refer to

"2.3

Display Adjustment").

(DCalibration

voltage

output

and grounding

terminals

CAL

connector

: Outputs

calibration voltage

signals.

This terminal

is

used

for operation check of this instrument

and

adjustment

of probe

waveform

(refer

to

"2.1

Displaying CAL

Signal with AUTO SET").

1

(grounding)

connector

:

This is

the grounding

for

measurement.

(DVertical

axis

INPUT

connectors

(CHI to

CH3) :

Connections

for input

signals.

[VOLTS/DIV]

(CHI

,

CH2)

:

Select the

voltage

deflection factor (refer to

"2.5.1

Deflection

Factor").

1

50mV,1

00m

V,

500m

V I

(CHS)

:

Selects the voltage

deflection

factor (refer

to

"2.5.1

Deflection Factor").

[POSITION?]

(CHI

to

CHS) :

Move the

position in the

vertical direction (refer

to

"2.4

Vertical and Horizontal

Positioning").

I

DC/AC

I

(CHI to

CHS),

I

GND

I

(CHI

,

CH2) :

Select the

input coupling (refer

to

"2.5.2

Input Coupling").

I

CHI

I

,

I

CH2

1,I

CH3

1

:

Select the

channel to be

displayed

on the screen (refer

to

"2.5.3

Display Channels").

I ADDI

:

Displays

the sum

of CHI and

CH2 (refer to

"2.5.5

Sum

(ADD)

and Difference (INV)").

I

INV

I

:

Displays

the

input of CH2

in

reversal (refer to

"2.5.5

Sum (ADD) and Difference (INV)").

^Horizontal

section,

etc.

[TIME/DIV] :

Selects

the sweep

rate

(refer

to

"2.6.1

Sweep Rate").

[POSITIONS]

. 1 FINE I :

Move the

position in the

horizontal direction (refer

to

"2.4

Positioning").

Magnifies

ten times

horizontally

(refer to

"2.6.2

Magnification").

Selects

ALT or

CHOP (refer to

"2.5.4

ALT

and CHOP").

Limits

the

bandwidth

(refer

to

"2.5.6

Bandwidth Limitation").

Vertical and Horizontal

1

Figure

1.1.2

Front

Panel

II

(DTriggering

section

I

AB

I

:

Selects

A sweep

or B sweep

(refer

to 2.1

1 Delayed

Sweep").

The indicator

lights

when

B sweep

is

selected.

[TRIG LEVEL]

:

Selects

the trigger

level

(refer

to

"2.8.4

Trigger

Level").

I

SLOPE

I

: Selects the trigger

slope

(+,

-

)

(refer

to

"2.8.3

Trigger

Slope").

I SOURCE I

: Selects

the trigger

signal

source

(CHI, CH2, CHS, LINE,

VERT), (refer

to

"2.8.1

Trigger Source").

I

COUPL

I

:

Selects the

trigger

coupling mode

(AC,

DC, HF REJ,

or LF

REJ)

(refer

to

"2.8.2

Trigger

Coupling").

\W\

:

Selects triggering

with TV

(BOTH,

ODD,

EVEN,

or TV-H)

(refer

to

"2.8.5

TV

Signal").

TRIG'D

indicator :

Lights

when a trigger

pulse

has

been generated.

READY

indicator

:

Lights while

waiting

for

signals.

(D=horiz display

-

C.A..J

,

I

B

I

,

I

X-Yl

: Select

the displa

y

m

ode

(

refer

to

"2.9

Horizontal

Display").

ALT

sweep

can

be

selected

by pressing

rAland

m

simultaneously.

(Z)

“

SWEEP MODE

=

I

AUTO

I.

[NORM

I

:

Select repetitive

sweep

(refer

to

"2.7.1

Repetitive

Sweep").

I

SGL/RST

I : Selects

single sweep

(refer

to

"2.7.2

Single

Sweep").

(DFUNCTION,

autoset,

etc.

I

AUTO

SET

I

:

Measuring

conditions

are

set automatically,

(refer

to

"2.1

CAL

wave

display

with

AUTO

[FUNCTION]

=

CURSORS

=

I

AV-At-OFF

I

I

TCK/C2

I

SAVE/RECALL

I :

HOLDOFF

I

DELAY/TRACE

SEP

SET.")

The delay

time, cursor

position,

etc. can be

set

by turning

or

pressing

this

knob.

Fine

adjust-

ment can

be effected

by turning this

knob.

Coarse

adjustment in

the

direction

this

knob

has

been turned

so far can

be effected

each time

this

knob is

pressed or

continuously

held

down.

Selects

At (time

difference

measurement),

AV

(voltage

difference

measurement),

or

OFF (re-

lease

of measurement)

(refer

to "Section 3.

Cursor

Measurement

and

Counter").

Selects

the

type of cursor

to

be moved

(Clor

C2 or

tracking)

(refer

to

"Section

3.

Cursor

Measurement and

Counter").

Selects Save

or Recall

(refer

to "Section

4.

Save/Recall").

Selects

HOLDOFF

(refer

to

"2.12

Holdoff").

]

:

Selects DELAY (refer

to

"2.1

1 Delayed

Sweep")

or

TRACE

SEP

(refer

to

"2.1

0 Trace

Sepa-

ration").

2

Section

2. Basic Operation

A

Cautions

#

Be sure to

connect or remove the power

cord after setting the power switch to STBY.

#

Use

this

instrument with the rated AC

power suppiy.

Voltage range

: 1 00 to 1 20 VAC

Frequency : 50/60

Hz

Power consumption :

1

1 0

VA max.

#

Be sure to use a

3-core power cord

appropriate to the suppiy voitage.

#

Do not piace

any object in the

vicinity

of

the air hoie or fan of this instrument.

#

Use this

instrument within the rated

operating range.

Temperature:

0 to

+40

°C,

humidity:

90%RH

(at

40

°C)

#

Power is appiied to this

instrument if the power switch is set to STBY. Disconnect the

power cord from the

receptacle if the

instrument

is

not

to be used for a long time.

#

Do not apply voltage

to the input terminal

exceeding the posted rating.

•CH1,

CH2,

CHS

input

Direct

:

±

400

V max.

With the

SS-082R/SS-0130R

(10

:

1)

or

equivalent :

±

600

V

max.

[Note]

The maximum input

voltage derates depending on frequency and high voltage pulse of an

input signal.

#

Do not raise

trace or character intensity beyond what is necessary.

This instruction

is for two purposes:

1)

to

protect

the user's

eyes

from

eye

strain

and fatigue, and

2)

to

protect the

CRT from burn-in.

General

Perform basic

operation using

CAL output and a

signal generator

so as to become familiar with this instrument.

The Iwatsu FG-350

is

used

for

the signal generator.

O

Symbols

on the panel

•

A Warning symbol

This symbol calls the

users' attention to the

description in the instruction

manual. This symbol is marked

near the

CHI, CH2, and CH3

INPUT terminals.

O

Symbols in the

instruction manual

Expression

of keys and knobs

I I

: Indicates a key.

[ ]

: Indicates a

knob.

O

Power switch

Indicates a state

wherein

this instrument is ready for ON operation with

power supplied

to

every

circuit.

Indicates a

standby

state

of this

instrument wherein

the STBY main power supply is off.

When AC power is

connected

to

AC LINE INPUT, power is supplied

to

the only

microprocessor

in

this instrument.

When AC

power is not connected to

AC LINE INPUT, panel

setup conditions are backed

up by

the

built-in battery.

4

0

How to read the

screen

•

Main

contents of display

A

CWPPP

RATP

^

trigger

i

A TRIGGERiA TRIGGER

AbWbbRHAlb;

30URCE

i

SLOPE

i

COUPLE

A TRIGGER

LEVEL

—

HOLDOFFTIME

o o-T,.

:B

TRIGGERisTRIGGER :B

TRIGGER

B SWEEP

RATE

j

;

g^^p^

|

COUPLE

B TRIGGER

LEVEL

DELAY TIME

FUNCTION MODE

Measurement of AV or At

Frequency

measured

CH1

i

Range

Setting

of ADD

Coup-

ling

CH3 jRange

iCoup-

i

ling

Sweep

enlarge-

ment

Limit of

band-

width

•

An example

of the display

A ^0|JS

CH1

+DC -t.OOmV

B

1

ps

CH2

-

DC

3.00mV

HO

:

100%

DLY

99.00

/7S

f:B-DELAY

A

1:

At=

5.00

^JS 1/At

=

200.0kHz

f

=

200.00 kHz

lOOmV

+

2:

i

200mV 3; 500mV

±

MAG BW

O

Loading

effect

of the probe

If a

cable, etc.

is directly

connected to

the circuit under

measurement, the input impedance

of the measuring

instrument works as a

load

and may cause

hindrance in

measurement. The RC

of this unit is

“1

MQ,

20

pF.” If

a

10:1

probe is used,

it becomes

the following

value, where the

loading effect

is largely reduced and highly

accurate

measurement

is enabled.

SS-7821

:10MQ, 13pF

SS-7811

;10MQ,

12.5pF

O

Grounding

Connect

the measurement

grounding

terminal

(left side of CHI INPUT) to GND of the circuit being measured.

Grounding

is

particularly

important

to

measure

high-frequency signals accurately. Connect the grounding lead

of

the

probe

as

closely

as

possible

to

the

grounding terminal

near the signals.

O

Settings

when power is

set STBY or

OFF

When

power is

set

STBY or

OFF, the panel

setup

immediately before such setting is stored. When

power is

turned

on

again, operation

restarts

with the panel setup

immediately before the

setting

to STBY or OFF. When

power

is

set

to OFF,

the

panel setupis backed up by

the built-in batteries.

The

state where

the power

cord is disconnected.

5