Iwatsu Sc7101 User manual

FREQUENCY

COUNTER

SC7101/SC-7102

INSTRUCTION

MANUAL

FREQUENCY

COUNTER

SC-7I01/SC-7102

F697-816151(L)

F271-816151(L)

SC-7101

/SC-7102

Cautions

on

Operations

When

using

the

Frequency

Counter

SC-7101/SC-

7102,

take

care

on

the

following

items.

Ambient

Temperature

and

Ventilation

The

instrument

operate

normally

in

the

ambient

temperature

of

O°C

to

+40°C.

Be

sure

to

use

the

instrument

within

this

range.

Use

beyond

the

limits

of

this

range

can

result

in

some

trouble.

Do

not

place

anything

near

the

venti-

lating

hole

in

the

cover

to

improve

the

efficiency

of

heat

dissipation.

Check

the

Supply

Voltage

Before

plugging

the

power

cord

to

an

electrical

output,

be

sure

to

check

its

voltage.

The

instru-

ment

can

be

used

on

the

line

voltage

shown

in

Table

1,

which

can

be

selected

with

the

voltage

selector

plug

on

the

rear

panel.

Operating

the

instrument

on

other

than

the

specified

voltages

can

result

in

breakdown.

In

case

of

switching

the

voltage

selector,

remove

the

power

cord.

Then

remove

the

fuse

holder

cap

by

turning

it in

the

direction

shown

by

an

arrow.

Pull

and

remove

the

voltage

selec-

tor,

then

insert

into

the

desired

center

voltage

value.

Table

1

Center

voltage

Voltage

range

AC

100

V

90

to

110

V

AC

120

V

108

to

132

V

AC

220

V

198

to

242

V

AC

240

V

216

to

264

Vv

Do

Not

Apply

Excessive

Voltage

The

maximum

allowable

input

voltage

is

200

V

(DC

+

peak

AC).

Never

apply

any

voltage

beyond

these

voltages.

Connection

of

Input

Signals

Use

a

supplied

coaxial

cable

for

connection

of

input

signals.

Use

of

single

core

wires

may

cause

an

incorrect

measurement

by

electric

noises

due

to

induction.

When

there

is

any

fear

of

mixing

of

noises,

etc.,

check

input

signals

with

the

oscilloscope.

Start

measuring

only

after

confirming

that

there

is

no

mixing

of

noise,

etc.

di

Switch

on

the

Rear

Panel

The

10

MHz STD

OUT-IN

switch

on

the

rear

panel

is

set

to

OUT

side

at

the

time

of

shipment.

When

this

switch

is

set

to

"IN"

side,

no

signal

of

the

internal

reference

oscillator

is

connected.

Be

sure

to

set

this

switch

in

"OUT",

since

setting

in

"IN"

will

not

allow

measurement

without

apply-

ing

external

reference

signal.

Earth

a

Protective

Ground

Terminal

When

supplying

the

line

voltage

from

the

power

consent

using

a

two-conductor

type

power

cord,

ensure

to

connect

the

ground

terminal

on

the

rear

panel

to

the

earth

in

order

to

prevent

a

danger.

When

supplying

the

line

voltage

from

the

power

consent

using

a

supplied

three-conductor

type

power

cord,

grounding

is

provided

with

an

earth-

ing

wire

attached

to

the

power

cord.

Type

of

Input

Circuit

The

input

circuit

of

the

instrument

is

not

of

the

floating

type

but

the

circuit

type

apply-

ing

the

unbalanced

signal

against

the

earth

poten-

tial.

Never

perform

measuring

the

primary

power

source

with

an

unclear

earth

potential,

which

causing

significant

danger.

Ensure

to

Replace

a

Fuse

with

the

Requied

Rated

Current

0.3

A

fuse

is

used

in

the

instrument

in

order

to

prevent

the

damages

to

the

circuit

due

to

excessive

voltage.

If

it is

fused,

make

sure

to

replace

only

fuse

with

the

required

rated

current

after

closely

checking

the

cause

of

fusing

and

repairing

the

defective

portion.

Never

use

those fuses

other

than

the

rated,

as

it

may

result

in

failure

of

the

instrument.

TABLE

OF

CONTENTS

Cautions

on

Operations

..

SECTION

1

SPECIFICATIONS

.

1-1

GENERAL

1-2

SPECIFICATION

.

1-2-1

Frequency

Measurement

.

1-2-2

General

csccescceccceee

1-2-3

Physical

Characteristics

-3

ENVIRONMENTAL

CHARACTERISTICS

-4

ACCESSORIES

..eeeeesseseeee

1

SECTION

2

OPERATING

INFORMATION

..cccccscccccccccccscvccccssccsccscccsssssssecsssssssssssssceees

2-1

FRONT

PANEL

.....

2-1-1

Power

Supply

aa

2-1-2

Display

of

Measured

Results

2-1-3

Input

ceccceee

2-1-4

Measuring

Condition

Setting

2-2

REAR

PANEL

wesccccccccescccesece

.

2-3

DISPLAY

UNIT

sescsscseccccccccscscseces

2-4

HOW

TO

USE

THE

CARRYING

HANOLE

(STAND)

NNNNNNNNN

SECTION

3

MEASURING

PROCEOURES

3-1

POWER-ON

.

3-2

ON

RESET

.

3-3

MEASUREMENT

.

3-3-1

Frequency

Measurement

.

3-3-2

DIFF

Calculation

.

3-4

MEASUREMENT

USING

AN

EXTERNAL

REFERENCE

OSCILLATOR

3-5 USE

AS

THE

SECONDARY

FREQUENCY

STANDARD

UUUwnWwaww

SECTION

4

ADJUSTMENT

OF

REFERENCE

OSCILLATOR

sesseeeseeccccccccenccccecccencesssceassssssesessees

4-1

PREPARATION

FOR

ADJUSTMENT

...

4-1-1

Removing

the

Upper

Cover

.

4-1-2

External

Reference

Oscillator

.

4-2

ADJUSTMENT

PROCEDURE

«.sseeeeeeeeee

SECTION

5

SCHEMATIC

DIAGRAM

.

'

PEEUNNA=

'

OUFENNZA245

'

BE

ENN=AS5

'

Nese

MEMO

iv

SC-7101

/SC-7102

Section

1

Specifications

1-1

GENERAL

The

frequency

counter

SC-7101/SC-7102

are

compact

and

light

weight

electronic

measuring

instrument

which

can

measure

frequency

of

wide

range

from

10

Hz

to

200

MHz.

Use

of

large

and

high

luminousity

LED

in

the

display

makes

reading

easier.

This

instrument

is

provided

with

follow-

ing

features.

Use

of

Easy-to-read

Large

Light

Emitting

Diode

The LED

display

is

decimal

9

digits

+

1

digit

of

exponent

and

employs

Zero-blanking

methode.

Capability

of

Measurement

of

Low

Frequency

Signals

with

High

Resolution

This

instrument

allows

measurement

of

signals

of

low

frequencies

with

high

resolution

(normally

7-digits

per

1

s)

in

a

very

limited

time

by

the

reciprocal

methode

frequency

measurement.

Automatic

change

to

direct

frequency

measure-

ment

for

input

signals

of 10

MHz

or

more

enables

this

instrument

to

perform

measurement

of

input

signals

with

the

heightest

resolution.

Provision

of

DIFF

Calculation

Function

This

instrument

can

calculate

and

display

differences

between

the

values

of

input

signals

and

the

reference

value

by

a

simple

operation.

Allows

Easy

Systemization

of

Measuring

Since

mounting

of

an

optional

GP-IB

interface

or

a

centronix

type

parallel

interface

enables

output

of

measured

results,

external

reset,

remote

control

of

the

time

base, etc.,

this

instrument

can

be

built

into

a

systemized

configuration.

Built-in

Highly

Stabilized

Reference

Oscillator

and

Capability

for

External

Connection

The

SC-7101

and

SC-7102

have

built-in

high

stability

reference

oscillator

of

+3

x

10~’/month

and

#2

x

1078/day

respectively.

In

addition,

external

input

of

reference

sig-

nals

of

high

accuracy

is

possible.

4-Step

Setting

of

Sample

Rate.

(SC-7102)

Sample

rates

can

be

set

in

4-steps

of

200

msec

x1,

x2,

x

4

and

x

8

Improved

Shielding

Effect

The

specially

treated

cases

provide

better

shielding

effect

than

that

of

metal

cases

though

these

cases

are

made

of

light

weight

plastics.

Easy

Mounting

of

Optional

Supplies

Following

optional supplies

can

be

easily

mount-

ed.

(For

the

SC-0108

and

the

SC-0110,

select

either

one

only.

No

mounting

of

both

of

them

is

permitted).

*

Parallel

interface

SC-0108.

*

GP-IB8

interface

SC-0110.

On

SC-7102,

there

are

further

additional

op-

tions.

*

High

stability

reference

oscillator

the

SC-

0114.

(10

MHz

+

5

x

10-°/day).

*

High

stability

reference

oscillator

the

SC-

0115.

(10

MHz

+

2

x

10-$/day).

Out

of

the

above

options,

when

SC-0114

is

mount-

ed,

on

the

Name

plate

on

the

rear

panel

showing

the

Model

No., "B"

is

printed,

while

when

SC-

0115

is

mounted,

"C"

is

printed.

Section

1

Specifications

SC-7101

/SC-7102

1-2

SPECIFICATION

1-2-1

Input

Frequency

Measurement

Measuring

range

10

Hz

to

200

MHz

1

kHz

to

200 MHz

with

time

base

of

1

ms

100

Hz to

200 MHz

with

time base

of

10

ms

Input

voltage

At

ATTEN

1:

20

mrms

to

1

Vrms

(1

kHz

to

100

MHz)

50

mUrms

to

1

Vrms

(10

Hz

to

200

MHz)

At

ATTEN

1/20

:

0.4.Vrms

to

20

Vrms

(1

kHz

to

100

MHz)

1

Vrms

to 20

Vrms

(10

Hz

to

200

MHz)

Maximum

input

voltage

200

V

(OC

+

peak

AC)

Input

RC

Approximately

1

M2//25

pF

or

less

Attenuator

1

or

1/20

Input

coupling

AC

Sc-7101

SC-7102

Time

base

10

ms,

0.1

s,

1s,

10s

|

ims,

10

ms,

0.1

s,

1s,

105

Resolution

10

MHz

or

more

100

Hz/10

ms,

10

Hz/O.1

s,

|

1

kHz/1

ms,

100

Hz/10

ms,

1

Hz/1

s,

0.1

Hz/10

s

10

Hz/0.1

s,

1

Hz/1

s,

0.1

Hz/10

s

10

MHz

or

less

S

digits/10

ms

4

digits/1

ms

6

digits/0.1

s

5

digits/10

ms

7

digits/

1s

6

digits/0.1

s

8

digits/10

s

7

digits/1

s

8

digits/10

s

Reading

unit

EXPONENT

(0,

#3,

+6,

#9)

Hz

Error

10

MHz

or

more

Accuracy

of

reference

oscillator

+

1

count

10

MHz

or

less

Accuracy

of

reference

‘

Trigger

error

+

1

reference

time

oscillator

Measured

frequency

x

Time base

SC-7101/SC-7102

1-2-2

General

Calculating

function

Display

method

Display

digits

Display

time

Sample

rate

Reference

oscillator

Oscillation

frequency

Aging

rate

Rise

time

Temperature

Vibration

Impact.

Output

of

reference

frequency

Frequency

Released

voltage

50

terminal

Input

of

reference

frequency

Frequency

Input

voltage

Maximum

input

voltage

Input

resistance

Input

coupling

Power

supply

Supply

voltage

Section

1

Specifications

OIFF

$X-Xref

X

:

Measured

value

X-ref

Storage

display

method

At

mantissa

DIFF

Calculation

mal

8

digits

Reference

value

using

the

light

emitting

diode,

zero

blanking

decimal

9

digits

when

the

result

is

negative,

-

sign

and

deci-

At

exponent

21

digit

(0,

+3,

+6,

+9)

Time

base

+

sample

rate

or

infinite

display

SC-7101

Sc-7102

Approximately

200

ms

10

MHz

+3

x

10°7/month,

#10

x

10°?/year

(On

the

basis

of

1

hour

after

Power

on)

+3

x

10%

(On

the

basis

of

1

hour

after

Power

on,

from

immediately

after

power

on)

#3

x

1078/0

°C

to

+40

°C

#1

x

107

or

less

(For

30

minutes

each

in

three

direction

at

frequency

of

10 Hz

to

55

Hz

and

with

am-

plitude

of

1.5

mm)

#1

x

1077

or

less

(Dropping

from

height

of SO

mm

above

a

hard

wood

three

times

each

in

three

directions)

Approximately

200

ms,

400

ms,

800

ms

or

1.6

s

10

MHz

+2

x

10°8/day,

#10

x

10°°/year

(On

the

basis

of 24

hour

after

power

on)

+5

x

107°

(On

the

basis

of

1

hour

after

power

on,

from

10

minutes

after

power

on)

+5

x

10°8/0

°C

to

+40

°C

+5

x

1078

or

less

(For

30

minutes

each

in

three

direction

at

frequency

of

10 Hz

to

55

Hz

and

with

am-

plitude

of

1.5

mm)

+5

x

1078

or

less

(Dropping

from

height

of

50

mm

above

a

hard wood

three times

each

in

three

directions)

10

MHz

2

Vp-p

or

more

350

mVp-p

or

more

10

MHz

1

Vrms

to

5

Vrms

10

Vrms

Approximately

10

k®

AC

Center

voltage

Voltage

range

AC

100

V

90

to

110

V

AC

120

V

108

to

132

V

AC

220

V

198

to

242

V

AC

240

V

216

to

264

V

Selected

with

the

voltage

selector

plug

Section

1

Specifications

SC-7101

/SC-7102

Frequency

range

50

Hz

to

400

Hz

Power

consumption

Approximately

11

w

(SC-7101)

Approximately

15

w

(SC-7102)

1-2-3.

Physical

Characteristics

Weight

Approximately

2.5

kg

Dimension

(210#2)W

x

(1002)H

x

(310+2)L

[mm]

1-3.

ENVIRONMENTAL

CHARACTERISTICS

Operating

temperature

0

°C

to

+40

°C

Operating

humidity

85

$RH

or

less

(0

°C

to

+40

°C)

Storage

temperature

-20

°C

to

+70

°C

Storage

humidity

90

#RH

or

less

(0

°C

to

+70 °C)

1-4

ACCESSORIES

Power

cord

+s.

Coaxial

cable

Fuse

(FSA-0.3A)

Accessory

bag

.-

Instruction

manual

Figure

1-2-4.

Dimension

(SC-7102)

r

230

-

|

21022

=

10H

|

oe

aaa

1

:

31082

+

[=

gesgeesee

6

<|'

|

el

(SC-7101

and

SC-7102

are

of

the

same

dimensions)

SC-7101

/SC-7102

Section

2

Operating

Information

CAUTION

©

Check

mode

and

measurement

mode

In

this

manual,

the

status,

where

LED

located

above

the

|CHECK|

key

is

turned

on,

is

called

a

“check”

mode

and

the

status,

where

such

LED

turns

out,

is

called

a

“measurement”

mode.

With

the

“check’””

mode

selected,

performs

self-check

and

displays

the

frequency

(10MHz)

of

the

internal

refer-

ence

oscillator.

With

the

“measurement”

mode

selected,

measures

a

signal

applied

to

INPUT

A

or

B.

©

Hold

mode

and

sample

mode

In

this_manual,

the

status,

where

LED

located

above

the

|HOLD|

key

is

turned

on,

is

called

a

“hold”

mode,

and

the

status,

where

such

LED

is

turned

out,

is

called

a

“sample”

mode.

With

the

“hold”

mode

selected,

measurement

is

stopped,

while

such

measurement

already

started

be-

fore

the

|HOLD]

key

is

pressed,

is

continued

until

completion.

With

the

“sample”

mode

selected,

the

SC-7101

repeats

measuring

at

the

rate

of

approximately

200

msand

the

SC-7102,

at

the

preset

sample

rate.

2-1

FRONT

PANEL

This

paragraph

describes

the

switches

and

keys

on

the

front

panel

and

the

display

which

indi-

cates

measured

results.

See

to

Figure

2-1-1-(1)*(2)

2-1-1

Power

Supply

@

POWER

ON-OFF

Selects

line

voltage

on

or

off.

2-1-2

Display

of

Measured

Results

@

Numerical

display

LED

Indicates

the

measured

results

in

9

digits

of

the

mantissa

(or

8

digits

with

a

negative

sign)

and

one

digit

of

the

exponent

with

-

sign.

@

STATUS

LED

Indicates

operating

status,

which

are

REMOTE,

OVER,

GATE

and

OVEN

(for

SC-7102)

statuses.

REMOTE

:

Turns

on

in

only

GP-IB

remote

status.

OVER

Turns

on

when

the

measured

results

causes

overflow.

GATE

+

Turns

on

at

the

measuring

gate

open.

QVEN

+

Indicates

to

use

a

high

stability

crystal

oscillator

with

thermostat

(for

SC-7102

only).

Iwatsu SC7101 User manual

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