Tektronix 7D14 Manuel utilisateur

INSTRUCTION

MANUAL

Serial

Number

____

7D14

DIGITAl.

COUNTER

Tektronix,

Inc.

Box

500

•

Beaverton,

Oregon

97005

•

Phone

644-0161

•

Cables:

Tektronix

070-1097-00 371

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WARRANTY

All

Tektronix

instruments

are

warranted

against

defective materials

and

workmanship

for

one

year.

Any

questions

with

respect

the

warranty,

mentioned

above,

should

taken

with

your

Tektronix

Field Engineer

representative.

All requests

for

repairs and

replacement

parts

should

directed

the

Tektronix

Field Office

representative in

your

area.

This

procedure

will assure

you

the

fastest

possible service. Please include

the

instrument

Type

(or

Part

Number)

and

Serial

Model

Number

with

all

requests

for

parts

service.

Specifications

and

price change privileges reserved.

@ 1971

Tektronix,

Inc., Beaverton,

Oregon.

Printed

the

United

States

America. All

rights reserved.

Contents

this

publication

may

not

reproduced

any

form

without

permission

the

owner.

U.S.A.

and

foreign

Tektronix

products

covered

U.S. and foreign

patents

and/or

patents

pending.

I t

TABLE

CONTENTS

SECTION 1

SECTION 2

SECTION 3

SECTION 4

SECTION 5

SECTION 6

SECTION 7

SECTION 8

SPECIFICATION

Introduction

Electrical Characteristics

Environmental Characteristics

Physical Characteristics

OPERATING

INSTRUCTIONS

Installation

Display

Controls

and

Connectors

First-Time

Opennion

General

Operating

Information

Measurement

Modes

Operating

Modes

CIRCUIT

DESCRIPTION

Introduction

Block Diagram Description

Detailed Circuit Description

MAINTENANCE

Introduction

Preventive Maintenance

Troubleshooting

Replacement

Parts

Component

Replacement

CALIBRATION

Recalibration Interval

Test

Equipment

Required

Part I -

Performance

Check

Part II -

Adjustment

ELECTRICAL

PARTS

LIST

Abbreviations

and

Symbols

Parts Ordering

Information

DIAGRAMS AND CIRCUIT BOARD

ILLUSTRATIONS

Symbols

and

Reference Designators

Voltage

and

Waveform

Conditions

MECHANICAL

PARTS

LIST

Mechanical Parts List

Information

Index

Mechanical Parts Illustrations

Mechanical Parts List

Accessories

CHANGE INFORMATION

Page

1-1

1-5

2-1

2-4

2-5

2-8

2-10

3-1

3-3

4-1

4-4

5-1

5-4

5-12

Abbreviations

and

symbols

used in

this

manual are based

taken

directly

from

lEE E

Standard

260

"Standard

Symbols

for

Units",

MIL-STD-12B

and

other

standards

the

electronics

industry.

Change

information,

any,

located

the

rear

this

manual.

7D14

7014

•

MII

•

..,III.MIIIfT

INTERVAL

• •

••

•

-I

•

-J

••

_i~1

.--e

••

, f

••

O/CN.

Ii::..

..,...

7D14

TRIGGER

lEVllISlOPE

'""""

SINS

p- p VOLTS

ig.

, ."

7014

Digital

Count

...

PluIHn

Unit

7D14

SECTION

SPECIFICA

TION

Change

information,

any,

affecting

this section

will

found

the rear

this manual.

Introduction

The

7D14

Digital

Counter

plug-in

unit

designed

for

use

with

Tektronix

7000-series

Oscilloscopes

equipped

with

readout

system.

The

uses

the

readout

system

display an eight-digit

readout

the

CRT

the

associated

oscilloscope.

The

7D14

will

measure

frequency

from

525

megahertz,

frequency

ratio

from

lOs:

and

totalize

(count

number

events)

from

The

7D14

features

counting

capability

525

megahertz

without

prescaling,

input

impedance

ohms

megohm,

blanking

all zeros

the

left

the

most

significant digit,

trigger

pickoff

from

vertical amplifier

unit

(which allows

simultaneous

signal viewing and

counting,

and a trigger

indicator

analog

CRT

display

view

the

"shaped"

input

signal.

The

following electrical characteristics are valid for

instruments

calibrated

ambient

temperature

between

+20°C

and

+30°C

after

minute

warmup

period.

The

7D14

should

calibrated every

1000

hours,

every six

months

used

infrequently.

TABLE

1-1

ELECTRICAL

Characteristic

Performance

Requirement

Supplemental

Information

CHANNEL

(Count

Channel)

INPUT SENS

P-P VOLTS

Switch

Setting

50n

lMn

Frequency

Range

Coupled

525

mega-

525

mega-

hertz hertz

Coupled

200

kilohertz

5 hertz

525

megahertz megahertz

Sensitivity

100

millivolts

100

millivolts

peak-to-peak peak-to-peak

Input

Resistance As indicated

INPUT SENS

Switch

within

10%. VSWR

50-ohm

position

~1.5:1

Capacitance

Not

applicable

picofarads

within

20%

when

INPUT

SENS

set

input

impedance.

® 1-'

Specification-7D

TABLE

1-1

(cont.)

Characteristic Performance Requ

irement

Supplemental

Information

Maximum

Input

Voltage 10 volts RMS

200

volts

(DC +

Peak AC)

megahertz.

volts

(DC + Peak

AC)

525

mega-

hertz

TRIG

SOURCE

Sensitivity

1.5 divisions

vertical

deflection

minimum

Frequency Range Depends

upon

amplifier

plug-in

unit

TRIG

SOURCE

AC coupled.

and oscilloscope being used.

BW-5

MHz

Limits

upper

bandwidth

(-3

point)

5 megahertz

within

1 megahertz.

Trigger

PRESET Triggers on the positive slope

volt

level.

VAR

LEVEL

SLOPE

control

selects positive

nega-

tive slope triggering.

Range

INPUT

SENS

Switch

Setting

100

+0.5

volt

-0.5

volt

1 V

volts

-5

volts

10 V

+50

volts

-50

volts

MEASUREMENT

INTERVAL

Internal

Time

Base

Crystal

Oscillator

Frequency 5 megahertz

Accuracy

O°C

+50°C

Within

0.5

part

per

million

Long

Term

Drift

part

less

in 107 per

month

1-2 ®

Specification-7D

TABLE

1-1

(cont.)

Characteristic Performance

Requirement

Supplemental

Information

Internal

Gate

Range 1 millisecond

through

10 seconds Selectable in decade steps

Resolution

0.1

hertz

Accuracy

Within

±~±

Time

Base

Accuracy

ota

Count

CH B

Frequency

Range 10 hertz

2 megahertz AC Coupled

Only

Sensitivity

least

0.8

volt

peak-to-peak Sine wave

pulse

with

30%-70%

duty

cycle

Input

R 10

kilohms

within

20%

picofarads

within

30%

-~-

Max

Input

Voltage

volts

(DC + Peak

AC)

2 mega-

hertz

EXT

GATE

Input

Requirements

Compatible

with

TTL

Logic.

Turn

On Level

Logic

"1"

least

Volts

Turn

Off

Level Logic

"0"

+500

millivolts

less

Risetime

500

nanoseconds

(Maximum)

Falltime

500

nanoseconds

(Maximum)

Minimum

Off

Time

500

nanoseconds

Minimum

Time

200

nanoseconds

Propagation Delay

Transition

nanoseconds

within

nano-

seconds

Transition

seconds

within

nano-

seconds

Input

Resistance 8.2

kilohms

within

20%

Capacitance 35 picofarads

within

20%

® 1-3

Specification-7D

Characteristic

EXT

GATE

(cont)

Max

Input

Voltage

DISPLAY

TIME

Range

Detent

Position

RESET

Input

Requirements

Amplitude

Duration

Input

Resistance

Capacitance

Max I

nput

Voltage

MONITOR

INT

MHz

Signal

Amplitude

Open

Circuit

Source Impedance

ms-l0s

Signal

Amplitude

Open

Circuit

1-4

TABLE

1-1

(cont.)

Performance

Requirement

±15

volts (DC +

Peak

AC)

10 mega·

hertz

least 2 volts positive-going pulse.

Compatible

with

TTL

Logic,

Logic

"0"

+500

millivolts

less

Logic"

least

volts

least

500

nanoseconds

±20

volts

(DC + Peak AC)

10 mega-

hertz

OUTPUT

SIGNALS

Positive-going

pulse

from

internal

crystal

oscillator

volts

within

10%

Time

marker pulses

from

internal gate.

TTL

Logic

compatible.

5 volts

within

10%

Supplemental

Information

Continuously

variable

from

less

at least 5 seconds

(infinite)

8.2

kilohms

within

10%

picofarads

Logic

"0"

kilohms

Logic

"1"

2.2

kilohms

0.1 seconds

Characteristic

1 ms -10 s

(cont)

Polarity

Source Impedance

TABLE

1-1

(cont.)

Performance Requirement

Positive-going

Specification-7D

Supplemental Information

Logic

"0"

kilohm

Logic

"1"

""5.7

kilohms

Trigger

Indicator

CRT

analog

display

trigger

output

------------------------------~---

Display

Amplitude

0.2

div

within

25%

Position

Range

Usable

Frequency

Range

Signal Delay

TABLE

1-2

ENVIRONMENTAL

CHARACTERISTICS

Refer

the

Specification

for

the

associated

oscillo·

scope.

Size

Weight

Positionable

over 8

div

internal

control

System

Dependent

""5

nanoseconds

TABLE

1-3

PHYSICAL

Fits

all 7000-series plug-in

compartments.

2 Pounds 6 Ounces

(1075

grams)

'-5

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