Tektronix 7S11 Manual de usuario

Tektronix, Inc.

It!ktron~

COMMITTED

EXCELLENCE

WARNING

THE FOLLOWING SERVICING INSTRUCTIONS

ARE FOR USE BY QUALIFIED PERSONNEL

ONLY. TO AVOID PERSONAL INJURY,

NOT

PERFORMANYSERVICING OTHERTHANTHAT

CONTAINED

OPERATING INSTRUCTIONS

UNLESS YOU ARE QUALIFIED TO

SO.

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

7S11

SAMPLING

UNIT

INSTRUCTION

MANUAL

P.O.

Box 500

Beaverton,Oregon 97077 Serial Number:

____

070-0985-00

Product Group 42

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First Printing FEB 1970

Revised FEB 1989

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Contents

this publication may not

reproduced

any

form without the written permission

Tektronix, Inc.

Products of Tektronix, Inc. and its subsidiaries are covered

by U.S. and foreign patents and/or pending patents.

TEKTRONIX, TEK, SCOPE-MOBILE, and

are

registered trademarks

Tektronix, Inc. TELEQUIPMENT

is a registered trademark

Tektronix U.K. Limited.

Printed

U.S.A. Specification and price change privileges

are reserved.

INSTRUMENT SERIAL NUMBERS

Each instrument has a serial number on a

pa~el

insert, tag,

or stamped on the chassis. The first number

letter

deSignates the country of manufacture. The last five digits

the serial number are assigned sequentially and are

unique to each instrument. Those manufactured

the

United States have six unique digits. The country

manufacture is identified as follows:

BOOOOOO

100000

200000

300000

700000

Tektronix, Inc., Beaverton, Oregon, USA

Tektronix Guernsey, Ltd., Channel Islands

Tektronix United Kingdom, Ltd., London

Sony/Tektronix, Japan

Tektronix Holland, NV, Heerenveen,

The Netherlands

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TABLE OF CONTENTS

SECTION 1 SPECIFICATION Page

General

Information

1-1

Electrical 1-1

Environmental

Characteristics

1-2

Physical

Characteristics

1-2

SECTION 2 OPERATING INSTRUCTIONS

General

Information

2-1

Installation

2-1

Mating

2-1

First-

Time

Operation 2-2

Equivalent-

Time

Sampling

Operation 2-2

Controls

and

Connectors

2-2

Basic

Operating

Information

2-2

Basic

Applications

2-9

WARNING'

THE FOLLOWING SERVICEINSTRUCTIONS

ARE

FOR USE

QUALIFIED PERSONNEL

ONLY.

AVOID PERSONAL INJURY, DO

NOT

PERFORM

ANY

SERVICING OTHER

THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS

YOU

ARE

QUALI-

FIED

So.

SECTION 3 BASIC SAMPLING PRINCIPLES

Introduction

3-1

Basic

Sampling Techniques 3-1

Effective

Sampling

Time

3-4

Traveling Wave

Sampling

Gate 3-5

Dot

Response

(Loop

Gain) 3-5

Smoothing

3-5

Smoothing

Random Noise 3-6

Tangential

Noise

3-6

Display

Sensitivity-Deflection

Factor

3-7

Offset

3-7

Real-Time

Sampling

3-8

Sweep

Rates 3-8

REV FEB 1984

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7811

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7S11

TABLE

CONTENTS

(cont)

SECTION 4 CIRCUIT DESCRIPTION Page

Introduction

4-1

Block

Diagram 4-1

Feedback

Loop

and

Pulse

Amplifier

Chain 4-1

Vertical

Output

Amplifier

4-1

Sweep

Unit Drive 4-1

Readout

Logic

4-3

Circuit

Description

4-3

Trigger

Logic

4-3

Post

Amplifier

and

Attenuators

4-3

Memory

4-5

Output

Amplifier

4-8

Real

Time

Oscillator

4-8

Gate

Generator

4-9

Readout

LogiC 4-11

Power

Distribution

and

Decoupling

4-11

SECTION 5 MAINTENANCE

Introduction

5-1

Preventive

Maintenance

5-1

General 5-1

Cleaning 5-1

Lubrication

5-1

Visual

Inspection

5-1

Calibration 5-1

Parts

Identification

5-1

Parts

Replacement

5-2

Troubleshooting

5-4

Introduction

5-4

Troubleshooting

Aids

5-4

Troubleshooting

Techniques 5-5

Transistor

Checks

5-5

Diode

Checks

5-5

Field

Effect

Transistors

(FET) 5-6

Repackaging

for

Shipment

5-7

SECTION 6 PERFORMANCE CHECK/CALIBRATION

Introduction

6-1

Test

Equipment

Required 6-1

Short Form

Procedure

6-2

Preliminary Procedure 6-3

Check

-12.2-Volt

Power

Supply

6-5

Check

Interdot

Blanking

6-6

Check

Dot

Response

and

Smooting

6-7

Adjust

Memory

Gate

Width

(R460)

and

Memory

Gain (C275) With

Normalizer

Head 6-7

Adjust

Memory

Gate

Width

(R460)

and

Memory

Gain (C275) With

Sampling

Head 6-8

REV FEB 1984

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REV FEB 1984

TABLE OF CONTENTS (cont)

SECTION 7

SECTION 8

SECTION 9

Adjust

Variable

Balance

(R30S) and

Smooting

Balance

(R24S)

Check

Deflection

Factor

Accuracies,

Variable Control Range

and

Adjust

GAIN

Check

Memory

Overdrive Recovery

Check

Vertical Signal Out

Check

Vertical Gain

Change

in SMOOTH

Check

Memory

Slash

Check

Delay

Check/Adjust

Real

Time

Sampling (R41S)

Check

Offset

and

Adjust

Position (R32S)

Check

Real-Time Trigger

Amplifier

Output

ELECTRICAL PARTS LIST

Abbreviations

and

Symbols

Parts Ordering

Information

Index

Electrical

Parts

List

Electrical

Parts

List

DIAGRAMS AND MECHANICAL PARTS ILLUSTRATIONS

Diagrams

Mechanical

Parts

Illustrations

Repackaging

Instructions

MECHANICAL PARTS LIST

Mechanical

Parts

List

Information

Index

Mechanical

Parts

Illustrations

Mechanical

Parts

List

Accessories

CHANGE INFORMATION

Page

6-9

6-10

6-11

6-12

6-14

Abbreviations

and

symbols

used

this

manual are

based

taken

di-

rectly

from

IEEE

Standard

260

"Standard

Symbols

for

Units",

MIL-STD-12B

and

other

standards

the

electronics

industry.

Change

information,

any,

located

the

rear

this

manual.

Scans by

ARTEK

MEDIA

7511

iii

Scans by ArtekMedia => 2010

7S11

SAFETY

SUMMARY

The general safety information contained

this summary is for servicing personnel. Specific warnings and cautions will

found throughout the manual where they apply, but may not appear

this summary.

TERMS

IN THIS MANUAL

CAUTION statements identify conditions or practices that could result

damage

the equipment or other property.

WARNING statements identify conditions or practices that could result

personal injury or loss of life.

AS MARKED ON EQUIPMENT

CAUTION indicates a personal injury hazard not immediately accessible

one reads the marking, or a hazard

property

including the equipment itself.

DANGER indicates a personal injury hazard immediately accessible as one reads the marking.

SYMBOLS

IN THIS MANUAL

® Static-Sensitive Devices

This symbol indicates where applicable cautionary or other information is

found.

AS MARKED ON EQUIPMENT

DANGER-High

voltage.

Protective ground (earth) terminal.

ATTENTION-refer

to manual.

WARNINGS

POWER SOURCE

This product

intended to operate from a power source that will not apply mare than 250 volts rms between the supply

conductors or between either supply conductor and ground. A protective ground connection by way of the grounding conduc-

tor

the power cord is essential for safe operation.

USE THE PROPER POWER CORD

Use only the power cord and connector specified for your product. Use only a power cord that is

good condition.

GROUNDING THE PRODUCT

This product

grounded through the grounding conductor of the power cord.

avoid electrical shock, plug the power cord

into a properly wired receptacle before making connections to the product input or output terminals. A protective ground

connection

way of the grounding conductor

the power cord

essential for safe operation.

iv ADD FEB 1984

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ARTEK

MEDIA

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7511

DANGER ARISING FROM LOSS OF GROUND

Upon loss of the protective-ground connection,

all

accessible conductive parts (including knobs and controls that may appear

insulating), can render

electric shock.

USE

THE

PROPER

FUSE

avoid hazard, use only the fuse specified

the parts list for your product,

and

which is identical

type, voltage rating,

and

current rating.

NOT OPERATE

EXPLOSIVE ATMOSPHERES

avoid explosion, do not operate this product

atmosphere of explosive gases unless it has

been

specifically certified for

such operation.

NOT SERVICE ALONE

not perform internal service or adjustment

this product unless another person capable

rendering first

aid

and

resuscitation

present.

USE CARE WHEN SERVICING WITH POWER ON

Dangerous voltages exist at several pOints

this product.

avoid personal injury, do not touch exposed connections and

components while power

on.

Disconnect power before removing protective panels, soldering, or replacing components.

SILICONE GREASE HANDLING

Handle silicone grease with care. Avoid getting the silicone grease

your eyes. Wash hands thoroughly after using silicone

grease.

ADD FEB 1984 v

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ARTEK

MEDIA

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DElAV

......

"#Io

QII

•.

..-.

SAMPUNO

UNIT

7511

Fi9. 1·1.

7511

Sim

pli

Unit.

ScOffS

ARTEK

MEDIA

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7811

SECTION

7S11

SPECIFICA

TION

Change

information,

any, affecting this section will

found

the rear

the manual.

General

Information

The 7S11 Sampling

Unit

a single channel vertical

amplifier plug-in

unit

designed

for

operation in

Tektronix

7000-Series Oscilloscopes. The 7S11 accepts the S-Series

Sampling Heads. The Sampling

Head

determines the

input

characteristics and the availability

a trigger

pickoff.

The S-Series Sampling

Head

used

can

plugged

into

the

7S11

used

remotely on

optional extender cable

unit.

The

7S11

provides the power

for

the sampling head.

Interconnections

the sampling head circuits are provided

the connector in the sampling head

compartment

the

7S11.

The

7S11

and a

7Tll

Sampling Sweep

Unit

operated in

the center plug-in compartments

a 7000-Series

oscilloscope provide a single channel sampling system.

Two

7S11's and one

7Tll

provide dual-trace sampling, using the

electronic switching in the oscilloscope vertical amplifier.

X-Y

operation

provided

two

7S11's operated in the

center plug-in compartments

the oscilloscope.

a trigger

pickoff

provided in the sampling head,

interconnections between

two

7S11's and the

7Tll

through the

fixed

and movable

shoes

provide a trigger

selection

circuit

trigger the

7Tl1.

internally

reconstructed signal

provided

trigger a real-time

time-base

such

the

7850.

Sampled signals are presented

both

the oscilloscope

vertical

amplifier

and

the

front

panel connectors

for

external

use

with

auxiliary equipment

such

pen

recorders.

Characteristic

Deflection Factor

Units/Division

Range

®I

TABLE

1-1

ELECTRICAL

Performance

200

seven

steps in

2, 5

sequence. The Units/Division are

those labeled on the sampling head.

TABLE

1-1

(cont)

Characteristic Performance

Gain Accuracy

Within

when

NORMAL/

(Ratio

add SMOOTH

function

I\IORMAL,

accuracies

with

GAl

N adjusted

any

Units/

source, oscillo- Division switch setting.

Within

scope, attenu- when

NORMAL/SMOOTH

func-

ators, etc.)

tion

SMOOTH.

Units/Division Extends deflection

factor

from

Variable Range

unit/division

less

least

400

units/division.

GAIN

Range

Permits adjustment

deflection

factor

at any Units/Division switch

setti

for

all 7000-series oscillo-

scopes.

DELAY

Range

least 10

ns.

Memory

Slash

0.1

division

less

for

ambient temperature

O°C

less

than 30°C.

DC OFFSET

volt

-1

volt

more.1

Range

OFFSET

OUT

Range +10 volts

-10

volts

more.

Relation

Actual

Offset

= (0.1) (Offset Out)

actual Offset

within

2%.

Source resistance 10

within

1%.

(related

actual Offset)

VERTical SIGnal

OUT

Amplitude

in (Signal

input

in volts) (U

2?0

/0'

)

volts

nits

within

2%.

2.4 volts peak-to-peak

( Referenced maximum.

input)

Deflection

factor

200

mV/displayed division

within

(Referenced

in +UP

INVERT.

CRT)

Source resistance 10

within

0.5%.

1Unless

otherwise

stated

sampling

head

front-panel.

1-1

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