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72-1002-C

Instruction

Manual

for

MODEL

5740

MULTIFUNCTION

COUNTER

Specifications

Operation

Theory

of

Operation

Maintenance

Parts

Lists

Schematics

qi

IDATA

PRECISION

72-1002

Model

5740

COUNTER

COPYRIGHT

1975

DATA

PRECISION

CORPORATION

PRINTED

IN

U.S.A.

Second

Edition

-

March

1977

PROPRIETARY

NOTICE

The

information

contained

in

this

publication

is

derived

in

part

from

proprietary

and

patent

data

of

the

Data

Precision Corporation.

This

informa

tion

has

been

prepared

for

the

express

purpose

of

assisting

operating

and

maintenance

personnel

in

the

efficient

use

of

the

Model

5740

Multifunction

Counter,

and

publication

of

this

information

does

not

convey

any

rights

to

reproduce

it

or

to

use

it

for

any

purpose

other

than

in

connection

with

the

installation,

operation,

and

maintenance

of

the

equipment

described

herein.

COPyRIGHT

1975

DATA

PRECISION

CORPORATION

PRINTED

IN

THE

US.A.

72-1002

Model

5740

COUNTER

CONTENTS

1.

INTRODUCTION

1.1

General

1.2

Specifications

2.

OPERATION

S

CALIBRATION

2.1

General

2.2

Controls

£

Indicators

2.3

Measure

Frequency

2.3.1

General

2.3.2

Step-by-Step

Procedure

2.U

Measure

Period

2.4.1

General

2.4.2

Step-by-Step

Procedure

2.5

Totalizing

Events

2.5.1

General

2.5.2

Step-by-Step

Procedure

2.6

Stopwatch

2.6.1

General

2.6.2

Step-by-Step

Procedure

2.7

Ontions

2.7.1

BCD

Outputs

2.7.2

BCD

Interfacing

2.7.3

Remote

STOP/STOP

2.7.4

External

CLOCK

2.8

Calibration

2.8.1

General

2.3.2

Step-by-Step

Procedure

3.

PRINCIPLES

6

THEORY

OF

OPERATION

3.1

General

3.2

Simplified

Block

Diagrams

3.2.1

Measuring

FREQUENCY

3.2.2

Measuring

PERIOD

3.2.3

Counting

Time

Increments

(SECONDS)

3.2.4

Totalizing

EVENTS

3.3

Gating

Controls

3.3.1

Counter

Gate

3.3.2

Divider

Gate

3.4

Counter-Latch-Display

Controls

3.4.1

Intercycle

Control

C

Repetitive)

3.4.2

Manual

Control

3.5

Input

Signal

Conditioning

3

3

3.8

3.9

6

Time

Base

Generation

7

Programmable

Divider

8

Counter

Gating

3.8.1

Counter

Gate

Intercycle

Control

3.9.1

Repetitive

Measurement

3.9.2

Manual

Measurement

10

Counter-Latch-Overflow

11

Display

3.12

BCD

Option

MAINTE5JANCE

4.1

4.2

General

4.1.1

Technician

Qualification

Trouble-Shooting

Strategy

4.2.1

Overall

Flow

Diagram

4.2.2

Display

Symptoms

Test

Equipment

Overall

System

Performance

Check

4.4.1

General

4.4.2

Set-Up

Power

Supply

Check

4.5.1

General

4.5.2

Procedure

Crystal

Time

Base

Check

Counter-Latch-Display

Check

4.7.1

Set-Up

4.7.2

Procedure

Input

Signal

Conditioning,

Pro

grammable

Divider,

and

Decimal

Point

Check

4.8.1

Set-Up

4.8.2

Procedure

5.

PARTS

LISTS

5.1

Display

Assembly

5.2

Main

Assembly

6.

REFERENCE

SCHEMATICS

6.1

Main

PC

Board

6.2

Display

6.3

BCD

Option

4.5

4.6

4.7

4.8

ILLUSTRATIONS

2-1

Model

5740

Front

Panel Controls

and

Indicators

2-2

Model

5740

Rear

Panel

3-1

Model

5740

FREQUENCY

Measurement

Simplified

Block

Diagram

3-2

Model

5740

PERIOD

Measurement

Simplified

Block

Diagram

3-3

Model

5740

SECONDS

Measurement

(STOPWATCH)

Simplified

Block

Diagram

3-4

Model

5740

EVENTS

Totalizing

Simplified

Block

Diagram

3-5

Model

5740

Input

Signal

Conditioning,

Schematic

3-6

Model

5740

Programmable

Divider,

Schematic

3-7

Model

5740

Counter

Gating,

Schematic

3-8

Model

5740

Intercycle

Control,

Schematic

3-9

Model

5740

Intercycle

Control,

Timing

Waveforms

3-10

Model

5740

High

Speed

LSD

Timing

Waveforms

4-1

Overall

Trouble-Shooting

Flow

Diagram

4-2

Power

Supply

Trouble-Shooting

Strategy

and

Test

Sequence

4-3

Model

5740

Main

PC

Board

Assembly

Test

Points

and

Components

4-4

Crystal

Time

Base

Check

Test

Sequence

4-5

Input

Signal

Conditioning

6

Decimal

Point

Test

Sequence

4-0

Input

Signal

Conditioning

£

Attenuator

Test

Check

4-7

Programmable

Divider

Test

Sequence

4-8

Intercycle

Control

Test

Sequence

COPYRIGHT

1975

DATA

PRECISION

CORPORATION.

PRINTED

IN

THE

USA.

72-1002

Model

5740

COUNTER

-6

Frontispiece.

Model

5740

Multifunction

Counter

COPYRIGHT

1975

DATA

PRECISION

CORPORATION

PRINTED

IN

THE

U.S.A.

72-1002

Model

5740

COUNTER

1

INTRODUCTION

1.1

GENERAL

Data

PrecisionModel

5740

Multi-Function

Counter

is

a

medium-frequency,

seven

deci

mal-digit

display

unit,

capable

of

opera

ting

in

any

one

of

four

measurement

modes.

The

Model

5740:

1)

Measures

frequencies

of

repetitive

signals

from

5Hz

to

lOOMHz.

2)

Measures

periods

from

0.5usec

to

0

.

2

sec.

3)

Measures

time

intervals

from

0.01

sec

to

99

,

999.99sec,

and

displays

five

integral

decades

and

two

decimals

of

the

total.

9)

Provides

a

front-panel

trigger

level

control

to

adjust

threshold

of

axis

cross

ings

for

low

duty-cycle,

offset,

and

AM-

modulated

inputs.

10)

Incorporates

a

built-in

hysteresis

so

that

noisy

input

signals

may

be

mea

sured

accurately.

11)

With

BCD

option

installed,

provides

four-line

BCD

(1-2-4-8)

output

data

for

each

of

the

seven

digits,

decimal

point

location,

and

counter

status

signals

for

remote

display,

recording,

or

data

pro

cessing

applications.

Also

includes

re

mote

START-STOP

control

for

Time

measure

ments

.

4)

Totalizes

events

from

one

to

9,999,999

and

displays

seven

full

decades

of

that

total.

5)

Provides

four

selectable

time

in

tervals

from

O.Olsec

to

lOsec

over

which

to

average

the

measured

frequency.

6)

Provides

four

selectable

multiples

from

1

to

1000

of

the

number

of

cycles

over

which

to

average

the

measured

period,

7)

Automatically

positions

the

display

ed

decimal

point

to

obtain

direct

readout

of

kilohertz

(Frequency

measurement),

microseconds

(Period

measurement),

hun-

dredths

of

seconds

(Time

interval

measure

ment),

or

units

(Events

measurement).

8)

Makes

its

measurements

with

signal

inputs

as

low

as

lOmV

RMS

(sine

wave)

or

30mV

peak

(pulse),

with

duty

cycles

as

low

as

10%

of

CW

or

AM

modulated

signals.

12)

Has

optional

provision

for

intro

ducing

high

precision

external

crystal-

controlled

time

base

in

addition

to

the

internal,

aged-crystal

controlled

time

base

circuit.

The

instrument

is

self-contained

in

one

portable

case

only

3-1/2"

high

by

8-1/2"

wide

by

7-1/4"

deep,

with

a

car

rying

handle

that

doubles

as

a

tilt

stand.

A

three-wire

line

power

cord

is

integral

with

the

unit,

and

the

power

line

is

protected

with

a

rear-panel

ac

cessible

line

fuse.

All

operating

con

trols,

indicators,

and

input

connec

tions

are

front-panel

mounted.

Each

instrument

is

designed

for

one

of

the

standard

115

or

230V,

47

to

430

Hz

power

mains,

and

the

particular

source

for

which

the

instrument

is

wired as

it

leaves

the

factory

is

shown

on

the

rear

panel

label.

COPYRIGHT

1976

DATA

PRECISION

CORPORATION.

PRINTED

IN

THE

US.A.

11

72-1002

Model

S740

COUNTER

1.2

SPECIFICATIONS

1.2.1

Mode

Performance

jj

c

o

B

0)

u

3

cn

>1

o

c

<D

0)

U

Ranges:

Sinewave:

Pulse:

Gate

Times/Resolution:

5Hz to

lOOMHz

0

pps

to

100,000,000

pps

(Double

Pulse

Resolution:

15

nanosec.

between

consecutive

pulses)

.01

sec/lOOHz

.1

sec/

lOHz

1

sec/

iHz

10

sec/0.iHz

Accuracy:

±1

count

±

time

base

uncertainty

Readout:

Directly

in

Kilohertz

(7

decimal

digits)

c

(1)

B

C

u

3

W

c

s

•H

<u

0.

Ranges:

Sinewave:

0.5

to

200,000.0

^sec.

(5Hz

to

2MH2)

Pulse:

0.5

to

9,999,999

psec.

(0

pps

to

2,000,000

pps)

(Max.

Resolution:

1

nanosec.)

Periods

Averaged/

Resolution:

Accuracy:

Readout:

1/

1

usec.

10/

0.1

usec.

100/

0.01

usec.

1000/0.001

usec.

Trigger

Uncertainty

('^

20

nanosec.)

No.

of

Periods

Averaged

Directly

in

microseconds.

+

time

base

uncertainty

±1

count

.j

c

c

-H

0)

N

>

W

IB

■P

o

Eh

Ranges:

Signal:

Sinewave:

Pulse:

0

to

9,999,999

to

Overflow

(counting

continued

after

overflow)

5Hz

to

2MHz

0

to

2M

pps

x:

B

p

o

"O

c

P

B

u

g o e

S

u

0)

a

o

El

o

W

3

P

U)

cn

Id

Ranges:

Resolution:

0

to

99,999.99

seconds

(27.78

Hrs.)

0.01

seconds

1-2

COPYRIGHT

1975

DATA

PRECISION

CORPORATION

PRINTED

IN

THE

U.SA.

72-1002

Model

5740

COUNTER

1.2.2

Instrument

Performance

Time

Base

Type:

Frequency:

Uncertainty:

Stability:

Temperature:

Power

Supply

Sensitivity:

Warm-up

Time:

High-Stability

Crystal

lOMHz

±0.1

ppm.

Field

adjustable

±0.01

ppm/sec.

(Jitter)

±0.6

ppm/month

±4.0

ppm/year

±5

ppm,

oven

0°C

to

40°C

<0.1

ppm

at

all

modes

<

10

minutes

to

rated

performance

Input

Characteristics

Coupling:

Impedance:

Sensitivity

(@

xl

Atten):

Trigger

Level:

AC

(RC:i<0.05

seconds)

1

Megohm

||

25pf

(Input

2V

@

xl

Atten)

68

kilohm

(Input

2V

@

xl

Atten)

Sinewave:

lOmV

RMS

5Hz

to

20MHz

linearly

to

50mV

RMS

(?

lOOMHz

Pulse:

30mV

p-p

@

.25

nanosec.

width

linearly

to

150mV

p-p

@

7.5

nanosec.

width

Rise

Time:

for

adequate

sensitivity

after

RC=

0.05

sec.

coupling

Dwell

Time:

>

200

nanosec.

(Period)

5

nsec.

(Freq.

,

Events)

Adjustment

Range

@

xl

Atten

=

±0.5V

@

x20

Atten

=

±10V

Maximum

Inputs

w/o

Damage:

Sinewave:

Pulse:

DC

to

50KHz:

250V

RMS

50KHz

to

lOOMHz:

V

x

F

Product

=

12.5

x

10^

(Or

5V,

whichever

is

the

greater)

Peak

AC

+

DC

500V

(AC

component

limited

as

above)

Display

7

LED

decimal

digits,

0.43"

high

5

LED

decimal

point

2

LED

Annunciators

(Gate,

Overflow)

COPYRIGHT

1975

DATA

PRECISION

CORPORATION.

PRINTED

IN

THE

US.A.

13

72-1002

Model

S740

COUNTER

Power,

Physical,

Environmental

Powers

115V,

50/60Hz,

or

230V

SO/SOHz,

factory

connected;

12

Watts

Dimensions:

aS"

H

x

W

x

7-3/4"

D

(without

handle),

or

89cm

x

216cm

X

185cm

Weight:

6"!

lbs.

(shipping),

5

lbs.

(net);

or

2.27)cg

or

2.951cg,

respectively

o

o

Operating

Temperature:

0

C

to

40

C

Storage

Temperature:

-25°C

to

+75°C

Humidity:

0

to

80%

RH,

non-condensing.

1-4

COPYRIQHT

197B

DATA

PRECISION

CORPORATION

PRINTED

IN

THE

US.A.

72-1002

Model

5740

COUNTER

OPERATION

2.1

GENERAL

Data

Precision

Model

5740

Electronic

Counter

is

operated

using

clearly

marked

front

panel

controls

and

indicators.

Displayed

values

are

read

out

directly

in

engineering

units

of

kilohertz

and

microseconds,

and

annunciator

lamps

in

dicate

counter

OVERFLOW

and

GATE

opera

ting

status.

Remote

display

of

data,

counter

status,

gate

status

and

user

control

signals

(e.g.

printer

enable)

are

available

from

the

rear

panel

connector

when

the

BCD

option

is

factory

installed.

Any

or

all

options

may

be

installed

in

any

one

Counter

configuration.

Power

source

for

the

Model

5740

Counter

may

be

either

of

two

universally

standard

levels,

...

115

or

230,

(47

to

63Hz),

and

each

instrument

is

factory

wired

for

the

nominal

voltage

expected

in

the

area

in

which

the

instrument

is

to

be

shipped.

See

Paragraph

for

instructions

to

modi

fy

the

connections

if

required

for

other

local

conditions.

2.2

CONTROLS

AND

INDICATORS

Figure

2-1

locates

and

identifies

Model

5740

front

panel

controls

and

indicators.

Figure

2-2

locates

and

identifies

Model

5740

rear

panel

features.

Table

2-1

describes

these

controls

and

indicators

and

their

COUNTER

functions.

-

BEFORE

YOU

OPERATE

YOUR

MULTIFUNCTION

COUNTER

-

The

Model

5740

Multifunction

Counter

is

shipped

in

a

pro

tective

fitted

plastic

container.

This

manual

is

packed

in

its

own

wrapper

and

is

placed

outside

the

container.

It

should

be

read

very

carefully

before

operating

the

counter.

Your

shipment

should

contain:

(1)

One

Model

5740

Multifunction

Counter,

with

attached

line

cord

and

power

fuse

(2)

Certificate

of

Conformance

(3)

Warranty

Card

(4)

Authenticated

Factory

Acceptance

Test

Data

Sheet

(5)

One

Instruction

Manual,

containing

information

of

Specifications,

Operating

Instructions,

Theory

of

Operation,

Maintenance,

Parts

Lists,

and

Ref

erence

Schematics.

Inspect

the

packing

case

and

the

instrument

for

any

signs

of

damage

during

shipment;

report

immediately

to

the

car-

rier

if

any

apparent

damage.

COPYRIGHT

1975

DATA

PRECISION

CORPORATION.

PRINTED

IN

THE

US.A.

2-1

72-1002

Model

5740

COUNTER

♦

Ci»ac

5740

/\S

■>s

nitr

V

to

u

>

90i

1

0

1

,

.

(j«OATAy

I

TZZI

Lzr

:y

Fig.

2-1.

Model

5740

Front

Panel

Controls

and

Indicators

Fig.

2-2.

Model

5740

Rear

Panel

2

2

COPYRIGHT

1975

DATA

PRECISION

CORPORATION

PRINTED

IN

THE

U.S.A.